Pumps and Valves Jan-Feb 2018

ENDORSED BY SAPMA, SAPSDA, SAVAMA AND VAMCOSA

JAN/FEB 2018

IF IT’S NOT INVAL®, IT’S NOT INVINCIBLE

Pumps & Valves Product Guide

Pipes, Pumps and Valves Africa - Jan/Feb 2018

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APE Pumps Pumps at the heart of Africa Mining Institutions

Manufacturers of: Vertical industrial turbine pumps Multi-stage high pressure pumps Split casing pumps End suction pumps Water Processing Utilities

Vertical sump pumps API 610 pumps

Power Generation Authorities

Petrochemical Industries

26 Nagington Road, Wadeville Germiston 1400, South Africa Tel +27 11 824 4810 | Fax +27 11 824 2770 PO Box 14733, Wadeville 1422, South Africa Email: apepumps@mweb.co.za Website: www.apepumps.co.za

Leaders in pump innovation

CONTENT COVER STORY

Invincible Valves – Striving for diversification and Equality in the industry

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HOSES

Chick Henderson celebrates 50 years in business Why Verderflex hoses outlast competitor hoses?

6 7

PUMPS

Sustainable productivity improvements through quality maintenance Vesconite borehole spiders continue to perform Zonke Engineering Welcomes LEWA Innovation in today’s pumping technology Pumps to the rescue

VALVES

8 9 10 11 59

Replace the sleeve on a pinch valve in 80 minutes Refurbishment by Thermaspray helps extend life span of valves for SA Coal fired power plant New Venturi valve cuts retraction time for single acting cylinders after lifting BMG has recently been appointed by SAFi Thermoplastic Valve Solutions

PIPES

DPI Trading supplies pipe fittings to Ruwacon Civils for Nduli Reservoir

13 14 16 18 19

PUMPS & VALVES PRODUCT GUIDE ANSI Process Pumps AODD Pumps API Process Pumps Axial Flow Pumps Booster Pumps Canned Motor Pumps Centrifugal Pumps Chopper Pumps Circulator Pumps Concrete Pump Cryogenic Pumps Diaphragm Pumps Drum Pumps End Suction Pumps Fire Pumps Flexible Impeller Pumps Gear Pumps Grinder Pumps Helical Rotor Pumps Horizontal Split Case Pumps Jet Pumps Lobe Pumps Magnetic Drive Pumps Metering Pumps Multistage Pumps Peristaltic Pumps(Hose Pump) Plunger Pumps Positive Displacement Pumps Piston Pumps

20 21 21 22 22 23 24 23 26 26 27 27 28 28 29 29 30 30 32 31 32 33 33 34 34 36 35 39 35

Progressive Cavity Pumps 38 Regenerative Turbine Pumps 39 Screw Pumps 40 Self-Priming Pumps 40 Slurry Pumps 42 Submersible Pumps 41 Trash Pumps 42 Vane Pumps 43 Vertical Sump Pumps 43 Vacuum Pumps 44 Vertical Turbine Pumps 46 Well Pumps 46 Air Valves 48 Ball Valves 49 Butterfly Valves 50 Check Valves 48 Control Valves 51 Diaphragm Valves 51 Fire Hydrants 52 Gate Valves 53 Knife Gate Valves 52 Manual Actuators 54 Plug Valves 54 Pinch Valves 55 Pneumatic Actuators 55 Pressure Reducing Valves (PRV) 56 Rotary Valves 57 Safety Valves 56 Sleeve Valves 58

BUYERS GUIDE - PUMPS

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BUYERS GUIDE - VALVES

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ENDORSED BY SAPMA, SAPSDA, SAVAMA AND VAMCOSA

JAN/FEB 2018

IF IT’S NOT INVAL®, IT’S NOT INVINCIBLE

Pumps & Valves Product Guide

On the cover

Invincible Valves Tel: +27 (0) 11 822-1777 Email: enquiries@invalve.co.za Web: www.invalve.co.za

Pumps & Valves Africa

Managing Editor: Surita Marx Tel: +27 (0) 11 475-0010 Cell: +27 (0) 83 281-5761 Email: info@pumpsandvalves.co.za Web: www.pumpsandvalves.co.za Sales: Lusana Mrkusic Email: lusana@pumpsandvalves.co.za Sales: Chantelle Smith Email: chantelle@pumpsandvalves.co.za Production: Jeanette Jordaan Sub-Editor: Debbie van Rensburg

Index to Advertisers AC Valves 17 Ainsworth Engineering 53 AMD Rotolok 57 APE IFC Bauma ConExpo 58 Chick Henderson 13 Ernest Electro 41 Industrial Valves & Engineering 7 Invincible Valves OFC, OBC, 47, 49, 50 Kew Foundry 44 KSB IBC Pamodzi / Unique 9 Pipes, Pumps & Valves Africa 16 Quantum Foundry 59 Rapid Allweiler 20, 25, 31, 38 Sam Engineering 12 Tectra 15 Vac-Serve 45 Watson Marlow 37

Disclaimer

Opinions in this Publication are those of the authors and do not necessarily reflect those of this publication, its editorial board, its editor or its Publishers SAPMA. or VAMCOSA The mention of specific products in articles and advertisements does not imply that they are endorsed or recommended by this Publication or its publishers in preference to others of a similar nature, which are not mentioned or advertised. Reliance on any information contained in this journal is at your own risk.

While every effort is made to ensure the accuracy of editorial board makes no representations or warranties, express or implied, as to the correctness or suitability contained and/or the products advertised in this publication. The Publisher shall not be liable for any damages or loss, howsoever arising, incurred by readers of this publication or any other person/s. The Publisher disclaims all responsibility and liability for any damages, includes pure economic loss and any consequential damages, resulting from the use of services or products advertised in this publication. Readers of this publication indemnify and hold harmless the publisher, its officers, employees, and servants for any demand action, application or other proceedings made by any third party and arising out or in connection with the use of any services and/or products or the reliance on any information contained in this publication.

Pipes, Pumps and Valves Africa - Jan/Feb 2018

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COVER STORY

Invincible Valves – Striving for diversification and Equality in the industry The African continent has an abundance of mineral resources which plays a huge role in the Global economy. Globally we are seeing a mining crisis, which has affected mining regions, operations, equipment manufacturers, service providers, negative economic growth, just to name a few. Due to the many global pressures we are finding a steady decline in production and manufacturing figures. The first step to resolving such would be the Investments that are required, locally and internationally for ongoing profitable, successful and sustainable mining in Africa.

As these pressures continue to build on the mining industry, mine operators are pressed to identify solutions that maintain, or even, improve their bottom line. Many mines around the world are looking at their equipment and focusing on maximizing efficiency and productivity to get more with less, by partnering with one stop shop suppliers such as Invincible Valves, who are committed to doing their part to understand the global economy and supply quality products and ancillary equipment backed by service excellence and flexibility.

The success of Invincible Valves is due to the fact that, having successfully identified a gap in the market, they then took an innovative step and developed their own brand of valve, more commonly known as the Inval Range, a range of butterfly, ball and non-return valves, to alleviate the stress of customers having multiple suppliers. These are specially manufactured for Invincible Valves and readily available directly from their factory and or agents in all major centres around South Africa and service all four corners of the globe, while at the same time offering the mining and other industrial sectors, as the largest stockist in Africa a full range of Saunders, Insamcor, ClaVal and Chainwheels products. These include: Ball Valves; Butterfly Valves; Diaphragm Valves; Gate Valves; Knife Gate Valves; Non-return Valves; Pinch Valves; Pressure Reducing and Relief Valves; Actuators and all other add-on items such as positioners, switches etc.

Their strong track record in the industry over many decades esteems the trust they have built up with clients and stakeholders, how well they've been able to adapt the business model for ongoing

success, the invaluable knowledge they've accumulated over the decades and the lessons they've learnt.

“We are passionate about the mining industry and the servicing thereof”, Pamela du Plessis, Managing Director of Invincible Valves, explains, “hence the reason for our on-going creation and innovation of industry solutions.

Our sales office is equipped to quote on any valve and ancillary requirements as well as offer technical feedback with regards to the operation and installation thereof. We

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Pipes, Pumps and Valves Africa - Jan/Feb 2018

Invincible Valves is also striving for diversification within the business, expanding their markets, adding additional ancillary services and product range, directed to the mining, petro chemical, power generation, water, sewerage, gas works and general industries which will enhance customer experience and business expansion throughout Africa and beyond.

are able to offer manual and or control valves in a variety of packages. We also offer a fully operational workshop on site for valve repairs and or reconditioning, along with that you will find a fully operational rubber lining division which rubber lines according to your specification on valves, pipes, fittings and tanks.”

“Additionally, price is an issue in any business” Pamela du Plessis, clarifies, “with the current economic climate Invincible Valves has undertaken to look for ways to ease the financial pressure on clients because we do not want to sacrifice the quality of our products, so that proves to be our biggest daily challenge, the solution has been to create an additional range made from a lower grade of stainless steel in order to give customers options to balance quality and price to suit their specific needs, while still ensuring that customers receive a top-quality product, since compromising on service excellence is not an option.”

COVER STORY

stakeholders and esteemed customers to create a proactive approach to the way we do business from one day to the next.

We are ever evolving and make it a priority of our business.

Constantly assessing the risks and mitigating such is just another way we evolve on a constant basis. Our business model makes provision to recognise achievements inside and outside of our business, giving our staff empowerment opportunities going forward. Part of our empowerment program includes upliftment within the organisation as well as an intern program that gives disadvantaged scholars an opportunity to gain hands-on experience and earn a wage whilst studying.” Says Pamela Du Plessis.

As an approved and proud supplier of quality valve products and ancillary equipment backed by service excellence to all major industries within South Africa and worldwide, Pamela du Plessis says, “We maintain expertise and experience across a broad spectrum of industries and applications with a wide range of products, because it's extremely important for our business model to show that we have years of experience, and it does not only prove our commitment to the industry, but It is the combination of these values that allows us to form lasting business relationships” Du Plessis attributes her incredible drive to her dad, who was a business owner for most of her life. Growing up, she witnessed how he worked with great ethics, passion, dedication, accountability and ownership. He studied all his life, and shared his knowledge, he just loved what he was doing and that was and still is the key to his success.

Pamela du Plessis concludes “My advice for all the ladies out there is to get up, get dressed, put the big girl pants on, show up, and work hard,” she says, adding that “A leadership role can only be achieved by learning every aspect of the business, by knowing and understanding the people, being proactive, innovative, by learning a lesson with every encounter and by educating instead of over-compensating.”

“Furthermore, in order to keep ourselves in the current market trends we engage with our

Contact Pamela du Plessis, Invincible Valves, Tel: +27 (0) 11 822-1777, Fax: +27 (0) 11 822-3666, enquiries@invalve.co.za www.invalve.co.za Pipes, Pumps and Valves Africa - Jan/Feb 2018

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Chick Henderson celebrates 50 years in business HOSES

Principles and core values are a major contributor to the success and longevity of any business and for a company to survive a time span of some fifty years speaks volumes for the founder and the dedication of the personnel.

Chick Henderson Company, established in 1968, celebrates its 50th anniversary this year and looking back on its history, the late founder John Hamilton (Chick) Henderson would be justifiably proud of this milestone which was built on the moral and upstanding principles that typified the man, thus investing his characteristics into a lasting legacy. These principles of business ethics and correctness have been embraced by the employees themselves over the years, resulting in a loyal and trustworthy workforce.

Chick Henderson was a man of great moral fibre and his dedication to the sporting arena, either as a rugby player, administrator and commentator, gave him an insight into the lives of many, especially the under privileged community where he used the platform of sport to introduce a system of transformation. His passion for change shone through when he assembled a team of SA Barbarian rugby players to play in England. The team consisted of eight white, eight black and eight coloured players which caused a great deal of controversy but Chick’s astute leadership and passion for rugby avoided any backlash.

“With the 50th anniversary celebrations on the horizon, we are in for exiting times as far as the future of the company is concerned highlighting the importance of becoming more visible in the market. The holding company, Winhold Group, has achieved a 100% black holding, raising the (BEE) certificate to a level 5 BEE score. This latest development and re-vamp will build a lot more value into the brand and bring back the person and his values, which in the long term will ease the burden of ascending to the next level,” said Robert Dye, Branch Manager.

The evolution of transformation by the company has been a long term objective as a result of pressure from parastatals that have exerted enormous pressure on the group over the years. Management has changed the corporate structure to accommodate transformation and regard this as not mere window dressing but a genuine step towards future sustainability. Staff selection will be on merit, especially advantageous for those with long term exposure to the industry in order to complement the several members who have already reached a high level in the company structure. In total, as many as 60% of the company’s management, are from disadvantaged backgrounds.

“The hose industry is not fully transformed as yet as it rates as a small industry by comparison. In the light of our recent developments we are taking the lead in the industry by assisting young black professionals who wish to enter the hose industry by providing a starting point and supporting their growth into sustainable entities,” added Dye. 6

Pipes, Pumps and Valves Africa - Jan/Feb 2018

“’Chick Henderson has, during its history maintained a lead in the industrial and mining hose market with the quality of its products on offer, focussing on rubber and PVC hose and allied equipment sourced from a worldwide network of principle manufacturers that offer the widest range of superior products and support to enable us to resolve the most challenging application. The growth of the company has now necessitated the move to a bigger distribution centre, vacating the existing facility that has housed the business for the past 50 years. The new centre will combine the two existing Johannesburg facilities- head office as well as the bulk receiving and assembly facility. The sojourn into the new phase of our development will streamline our business and provide efficiencies that will service our market well into the future,” concluded Robert Dye. Contact Chick Henderson, Tel: +27 (0) 11 640-1400, Fax: +27 (0) 11 624-1432, rob@chickhenderson.co.za, www.chickhenderson.co.za

Why Verderflex hoses outlast competitor hoses?

Why do some hose pumps have short hose life and what unique features does Verderflex have that offer extended hose life beyond that of our competitors?

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Verderflex’ Dura pump series has several design features that provide longer hose life than our competitors. The first and most important of which is that the Verderflex hose construction.

Verderflex’ manufacturing process allows 3x more nylon reinforcing fibers into the hose. Hoses have to be compressed with hundreds and sometimes thousands of pounds of force.

The force is absorbed into the hose’s reinforcing fibers, therefore since the Verderflex hose have more fibers, it can spread that load out over a greater number of elements, thus reducing the stress per fiber and extending fatigue life. It’s remarkably simple, but Verder Pumps is the only ones who do it. Some manufactures machine the OD of their hoses but unfortunately their manufacturing process leaves the OD variable. Verderflex hoses are handmade to the correct tolerances and do not require any machining.

Verderflex hoses are made with 100% EPDM as oppose to some manufacturers using a thin EPDM liner bonded to natural rubber. The advantages higher quality EPDM hoses is a higher temperature resistance and no liner weak point, as there is no liner in the hose bonding between the dissimilar rubbers. This also leads to longer hose life.

In addition to the best hose available, the Dura pump incorporates an air-gap design, unique to Verderflex. Whereas

HOSES

oses fail for one main reason: fatigue. “Although there can be many reasons for a hose to failure, fatigue is one of the main seasons. Speed, discharge pressure and temperature are all influencing factors that increase hose fatigue.” Elaine van der Westhuizen at Verder Pumps explained. After 8-12 million cycles, the hose fails to return to round after compression. This is evidenced first by a reduction in flow, then physical deterioration of the hose. traditional-style hose pumps flange-mount their gearboxes to the pump housing, Verder use a torque arm connection so that there exists a physical separation between the pump and drive.

This way, all the heat that builds up in the drive does not conduct into the pump housing the way it can on traditional hose pumps.

The Dura pump hose is a little different than the traditional VF pump series hose. The wall is about 25% thinner. This means less compression force to occlude the hose. Less compression force = less stress = longer fatigue life. It gave up a little discharge pressure capability, but can still hit 175 psi continuous.

Two more quick points: The Dura pump rotor profile provides a more gradual compression of the hose lessening the effects of fatigue, and lastly the Dura hose is about 30% shorter than VFseries, so there is less stretching and elongation which can lead to wear and fatigue “Superior Verderflex hoses are available for many competing pumps, ” van der Westhuizen concludes.

Contact Elaine van der Westhuizen, Verder Liquids, Tel:+27 (0) 11 704-7500, www.verderliquids.com, elaine.vanderwesthuizen@verder.co.za

Pipes, Pumps and Valves Africa - Jan/Feb 2018

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Sustainable productivity improvements through quality maintenance PUMPS

Choosing an appropriate maintenance package from an original equipment manufacturer is a key step in the journey towards sustainable productivity enhancements.

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ccording to Willie van Wyk, general manager at FLSmidth, the company’s range of Krebs slurry pumps come with a range of maintenance options that drive productivity and reduce plant downtime.

“Pump audits are important, as these create benchmarks for improvement programmes, using indices like inlet and discharge pressure, flow rate and solids concentration to indicate problem areas and measure performance improvements,” he says.

“Condition monitoring also helps avoid unscheduled maintenance, and includes the systematic documenting of vibrations and recording of pump maintenance activities.”

FLSmidth Krebs mill discharge pumps.

Van Wyk says this approach also can reduce power consumed by pumps, and achieve longer lifespan for gland seals and bearings. As part of the maintenance programme, he highlights the features of the Krebs millMAX™ slurry pump range which allows fine-tuning while the units are still running thereby enhancing productivity.

“These adjustments to the millMAX™ range of pumps, for heavy duty output and abrasive slurries, are done on the suction side sealing through an adjustable wear ring. This avoids any recirculation and grinding of slurry which could lead to power loss,” he says. “This fine-tuning means that the pump does not have to speed up to maintain higher levels of production.

By closing the gap between the impeller and suction liner, the flow and head stays constant in the pump.”

By remaining operational through the fine-tuning process, plant stoppages are avoided so efficiency and throughput can continuously be 8

FLSmidth Krebs pump in tailings application.

optimised. Van Wyk emphasises the value of performance-based pump maintenance and servicing agreements, which contain specific measures to document results.

“In implementing these agreements, customers have access to the expertise of FLSmidth’s Pump Technical Group, who bring their experience in a vast range of applications around the world,” he says.

FLSmidth’s focus on lifecycle cost aims to improve pump performance and cut operating costs. Essentially, choosing the right maintenance package will lower the total cost of ownership of vital pumping equipment.

Contact Terence Osborn, FLSmidth (Pty) Ltd, Tel: +27 (0) 10 210-4820, marinda.kerr@flsmidth.com, www.flsmidth.com

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Vesconite borehole spiders continue to perform Spiders that were manufactured from Vesconite continue to be used to support the shafts of two borehole pumps installed on a Meyerton, South Africa, vegetable farm.

Farm owner Roland Gaberthuel designed the pump configuration that is able to pump 2-million litres of water a day.

He chose Vesconite as a replacement for bronze spiders since bronze was deemed to be heavy and likely to be stolen for its resale value should they be out the borehole during maintenance.

The spiders have an outer diameter of 100mm and a shaft of one inch, with

8mm radiating spokes - the spider’s legs that give the part its name.

Vesconite has often been used as a line shaft bushing that supports borehole pump shafts.

PUMPS

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ome 28 spiders were manufactured at Sima Turners, of Johannesburg, South Africa, for the owner’s farm some 15 years ago and these are still functioning to support two borehole pump shafts that reach 78m into the ground.

Its self lubricating properties and good wear characteristics mean that it is a suitable for the wear mating surface.

However, in this application, the spider is used to centralise the shaft.

Gaberthuel notes that the Vesconite is likely to last as long as the pumps, and it is expected that there will be no need to replace the spiders.

Contact Juan van Wyk, Vesconite, Tel +27 (0) 11 616 1111

Roland Gaberthuel, at the factory in which he manufactured the spiders

100% South African BEE Compliant

Different operations producing great results Support and save with local manufacture Range of Eco progressive cavity pumps and spares including explosive emulsion dispensing pump units.

Wilflo DD25 and DD50 Eco friendly, non-hazardous lube free double diaphragm pumps and spares.

The Eco BG Deep Lineshaft Borehole pump range including spares for agricultural, municipal and dewatering on mines.

Tel: +27 (11) 826 6111 Fax +27 (11) 826 6162 Email: sales@uniqueeng.co.za Website: www.uniqueeng.co.za

Pipes, Pumps and Valves Africa - Jan/Feb 2018

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Zonke Engineering Welcomes LEWA Zonke Engineering has been a specialist supplier of rotating equipment since early 2012 to provide a wider scope of supply to better service our customers.

Zonke engineering has been working diligently in securing key global agencies to further develop an exciting and innovating Fluid Transfer Division to add to our niche products and services.

We would like to take this opportunity to welcome LEWA as our newest Principal.

Founded in 1952 in Leonberg, Germany, LEWA has for the past 60 years been the global technology leader in positive displacement diaphragm pumps.

With various patented diaphragm pump heads and the innovative drive systems, “LEWA is able to model the suction and pressure strokes of pumps individually to reduce the pulsation to a minimum ensuring maximum process reliability and a long service life”.

With experience in different fluids as well as exotic process technologies and physical parameters, LEWA aim not only to supply a pump but to optimize your process.

For this reason LEWA are able to provide solutions to a wide variety of applications to deliver optimized systems

and turnkey solutions throughout a wide range of industries.

Zonke works on an exclusive basis with the following principals in our Rotating Equipment Division: • Abel Positive Displacement Pumps • Börger Rotary Lobe Pumps • Bungartz Centrifugal Pumps • CP Magdrive Pumps • Kamat Plunger Pumps • Shanghai Kaiquan Centrifugal Pumps • SIAD Macchine Impianti Reciprocation Compressors • Teikoku Canned Motor Pumps Lewa Positive Displacement Diaphragm Pumps Although we can provide excellent solutions for most applications with the above mentioned range of products, Zonke has many additional strategic partners to provide the correct solution required in the case that we cannot provide the correct solution with our exclusive partners.

Contact Zonke Engineering, Tel: +27 (0) 11 234-1770/1, sales@zonkesa.co.za, www.zonkesa.com

Innovation in today’s pumping technology Improving system performance, reducing energy consumption and meeting regulatory requirements remain the three biggest challenges facing today’s pumping industries.

A recent international webinar hosted by Nicole George, product manager at Eaton, explored some modern technologies to help address these challenges easily, effectively and quickly.

PUMPS

The pumping industry is growing. “It is not a small market sector and spans many industries from utilities to mining and metals, oil and gas, buildings and agriculture to name a few. In the US alone it was just shy of a $8 billion industry last year,” says George.

There are, however, some real challenges that impact on the opportunities the industry might present.

“Around the world pumping industries are battling with high energy costs,” says George. “Water facilities account for up to 40% of a city’s energy usage. Another market trend we are seeing is the challenge of dealing with aging infrastructure while more pump users are under pressure to find ways to protect their equipment more efficiently.”

She says research has indicated that while pump applications might vary these challenges are remarkably the same across industries.

“Pumps and systems are not inexpensive and so much effort and resources are going into keeping this equipment running.”

According to a study by the American department of energy 30 – 50% of energy consumed by pumping systems could be saved through effective equipment and/or control systems.

“It’s a pretty staggering number,” says George who states that energy optimization algorithms are increasingly being used to achieve energy savings on variable torque loads by reducing the output power while maintaining the speed.

“So, assume there are 20 motors (230V, 0,16A) operating at 30 Hz for the majority of the run time. If the motors run eight hours a day, five days a week for 50 weeks out of the year, one could save approximately $3 450 annually through energy optimization algorithms.”

This is because as the motor voltage decreases, the motor current also decreases in proportion to the voltage.

“The end result is an optimized state in which both voltage and current are at the lowest possible values to maintain the required speed,” she says. “We are seeing customers who are saving anything between 2 and 10% without changing any other systems or features on their pump systems, but only introducing energy optimization algorithms.”

She says it is all about maximizing up time.

According to the American Society of Civil Engineers the useful life of electrical components in a treatment plant is about 15 to 20 years.

“But unexpected things happen, failures occur and one does not always capture the whole lifespan,” says George.

“More often than not aspects of Variable Frequency Drive (VFD) such as these algorithms are being used to maximize equipment and gain on infrastructure lifespan.

Even leveraging just one year extra for a pump can make a major difference.”

Another way to save energy is introducing a multi-pump function to operations.

“It is used in process applications where multiple pumps or fans are used to maintain pressure or flow,” explains George. “A single proportional-integral-derivative (PID) loop in the VFD is used to maintain a process set point.

If a single pump or fan is not able to meet the demand, additional fans or pumps are used to boost the system.

Two types of multi-pump controls are available – a single Pipes, Pumps and Valves Africa - Jan/Feb 2018

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P -C E DL N

• Horizontal Split Water Pumps • CPX/HMX Type • SP Type • Vertical Turbine • CPW Type • CSR Type

CP 7

George says the multi-pump function is an external control system that provides cube feet per minute set point to VFD. “Pressure feedback measures the air flow and VFD adjusts the speed of the fan motor to maintain the desired CFM. “

Protect pumping systems CP S MP PU

HM

drive which is effectively one VFD used with one motor or a multi drive where each motor has a VFD.”

VERTICAL SP I

Our range of pump products include: • CP/CPO Series • CP7 Type • Vertical Spindle/ Cantilever Pump • HM Process Pumps • CSW Type • CSY Type • Process Pumps

C

PO

PUMPS

Over 25 years of experience in designing and manufacturing a complete range of centrifugal pumps for a broad spectrum CSO/CP of industrial, process and general applications.

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Another industry challenge currently being seen around the world is preventative maintenance, says George.

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MP PU

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“Maximizing uptime and protecting equipment is crucial for operations. Achieving energy saving and reducing maintenance and repair possibly are the best opportunities for improving pump systems,” she says. “Critical systems components require proactive maintenance such as impeller inspections and pipe cleaning.”

www.sam eng.co.za

One way VFD can protect a pump is when it comes to deadhead and dry run protection.

Providing customised pump solutions to various industries

Pump design techniques that ensure our pumps are manufactured to last

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Alloys to suit all applications Proud Manufacturers of SAMCO® Pumps

One can also protect the fan motor with broken belt protection or protect the contents and people in a building with fire mode.

“Deadhead is a condition where the system pressure (head) exceeds the pressure the pump is able to produce,” explains George. “Water is unable to leave the pump circulating inside the impeller generating heat and damaging the pump. VFD detects this without sensors and automatically shuts down the pump for inspection.”

VFD can also cut off pumps or slow pumps down in cases of loss of prime or dry well, says George.

“This is primarily used with well pumps. It compares current draw or torque at speed variables for significant changes. If the torque drops off or is erratic, no water is running through the propeller. The pump is then cut off or slowed own to allow the water level to rise.”

George says ultimately VFD has the features built in to improve efficiency and reliability of pumping systems ultimately saving costs and addressing many of the challenges industry face.

Nicole George, Eaton, www.eaton.com

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Pipes, Pumps and Valves Africa - Jan/Feb 2018

Replace the sleeve on a pinch valve in 80 minutes The standard practice for replacing a sleeve in any pinch valve is to remove the valve from the line, which requires the use of a crane for all but the smallest valves. The valve is then stripped – the sleeve replaced – and the valve rebuilt. It is then reinstalled in the line, a process that can take several hours at best requiring the attention of several fitters and millwrights.

VALVES

The standard practice for replacing a sleeve in any pinch valve is to remove the valve from the line, which requires the use of a crane for all but the smallest valves. The valve is then stripped – the sleeve replaced – and the valve rebuilt.

It is then reinstalled in the line, a process that can take several hours at best requiring the attention of several fitters and millwrights.

With the patented Red Roc Hi-Lift feature, the valve remains in the line and the sleeve can be replaced in a much shorter time with only two fitters.

On 15 September 2017 at a nickel mine in Mpumalanga a Red Roc valve sleeve was changed in 80 minutes and reduced the plant downtime by at least 10 hours.

“The process is simple and only involves removing the bolts holding the top half of the body in the line and slackening the ones in the bottom half. Jacking bolts on the valve flanges spread them from the pipe flanges, loosening the sleeve, so that it can be removed in line. The quick release clamps holding the two halves together are removed. The top half is then raised using the two hydraulic cylinders mounted on the bridge and operated by a hand pump. In the raised position the old sleeve can be lifted out and the new one fitted in position. The process is then reversed with

the body being allowed to drop by releasing the oil in the cylinders back to the reservoir – the clamps are refitted and line bolting replaced,” said Gregor Hopton, Afrivalve’s group marketing manager.

The Red Roc Hi-Lift pinch valves are manufactured by Afrivalve, a division of eDART Slurry Valves at its facilities in Jet Park. The range includes sizes from DN150-DN600 with larger sizes available on request.

Contact Gregor Hopton, Afrivalve, Tel: +27 (0) 11 791 1411, gregh@afrivalve.co.za, www.afrivalve.co.za

Pipes, Pumps and Valves Africa - Jan/Feb 2018

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VALVES

Refurbishment by Thermaspray helps extend life span of valves for SA coal fired power plant Thermaspray applied the proven technologies of thermal spray coating and PTA (plasma transferred arc) welding to successfully refurbish 2-way-3way valves at one of South Africa’s coal fired power generation plants.

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epending on plant size, up to 15,000 valves can operate at a single power generation plant. In the steam cycle, components such as steam generators, pumps and turbines that handle steam and water require a variety of control, safety and shut off systems. High pressure steam, high temperatures and metal-to-metal wear at seating areas are the main contributors of wear in steam and water valves.

Thermaspray was approached by a power station to refurbish 2way-3way valves that have been in operation for many years.

Philip van Wyk, Engineering Support Manager at Thermaspray, explains that over the years the valves had been repaired by different companies and, while not all the repair methods used are known, Thermaspray was able to determine that thermal spray coatings and welding processes were used on some of the valves. “Subsequent to material analysis it was found that a variety of different materials was used on the valve seats which were not necessarily the recommended Stellite 6 coating.

Furthermore the split rings were manufactured from a range of materials and not the specified cast iron.”

Van Wyk adds that of major concern was the preparation method used for the spraying of the spindles and piston bores as well as the required seat face weld thickness required to refurbish the parts to original specification.

“Historically, it seems that the minimum weld thickness was applied on the seat faces and, the seat’s overall width was never refurbished to the original size. This meant that in some cases welding thicknesses of more than 10mm were required.”

Van Wyk adds that as previous thermal spray repair preparation made use of a ‘thread finish’, underneath the coating which had to be completely removed resulting in coating thicknesses of more than 2,0mm.

After receipt, numbering and stripping of the valves, Thermaspray conducted a complete inspection which includes non-destructive testing on all the valve parts. This involved material analysis on the valve seat face as well as the outer diameter to establish what welding material was used for the previous repair and what the substrate material is for the Thermaspray Stellite 6 repair. Analysis was also performed on the outer body, inner body and spindle.

Van Wyk notes that they do not use old rings and bushes as part of the refurbishment process regardless of their condition.

Using the correct grade cast iron, Thermaspray manufactured new spindle rings, outer body cylinder rings and bushes for

14

Pipes, Pumps and Valves Africa - Jan/Feb 2018

each valve to the power utility’s specification.

Explaining the refurbishment process in greater detail, Van Wyk says that to enable a thermal spray coating and PTA repair, all the old coatings, whether thermal spray, plated coatings or welding, had to be removed by machining and grinding. Nondestructive testing was repeated on the parts after coating removal to ensure substrate material integrity.

All areas to be sprayed were then prepared using international best practice techniques. Locating diameters were sprayed using a metal alloy. Where wear resistance was required, Carbide coatings were applied which was final-ground using diamond wheels. In most cases, due to the multiple repairs and techniques used for the past repairs on the valves, both the bores and the piston spindle outer diameter required material build-up in excess of 1,0 mm. A metal alloy build-up layer was applied first, followed by the application of the wear resistant

chemicals and corrosion as well as wear resistance (resulting from erosion, abrasion and sliding wear). Thermal spray is the method of spraying materials onto a prepared substrate material by heating particles in the stream of a heat source to create a semi-molten state. Particles are then propelled by high velocity onto a prepared substrate where they adhere to the base surface via a mechanical bond. Particles then continue to build until a specified thickness is attained.

On completion of all repairs, NDT was done by a third party inspector to ensure that there were no coating defects. Final assembly work was done at Thermaspray. Each valve was tested and signed off by the responsible engineer from the power station.

Contact Dr Jan Lourens, Managing Director, Thermaspray, Tel: +27 (0) 11 316-6520/8/9, Fax: +27 (0) 11 316-7527, jlourens@thermaspray.co.za, www.thermaspray.co.za

VALVES

Thermaspray also refurbished the valve spares to a standard set of dimensions to ensure interchangeability if required. These sizes were developed together with engineers from the power station and Van Wyk confirms that they have proven to be successful.

coating. Van Wyk confirms that all the coatings used for the refurbishment were finished at the Thermaspray facility.

Repair of the seat faces were done using Stellite 6 material applied with the PTA welding process. In some cases up to 10mm thick layers were applied to restore the seating area to the correct dimension. Van Wyk points out that a stainless steel butter layer can be applied when greater thickness coatings are required. “The Stellite 6 thickness after machining will typically be 3-4mm minimum.� The valve seats were stress-relieved and final machined at the Thermaspray facility.

PTA weld hardfacing is a welding process used to produce high-quality weld hardfacings of Ni, Co and Fe alloys.

The PTA hardfacings are metallurgically bonded to the parent material and are able to handle impact and point loading that a thermal spray coating cannot do. The advantages of PTA welding over other weld hardfacing techniques are that PTA weld deposits are characterised by low levels of inclusions, oxides and discontinuities and the weld hardfacing closely mimics the corrosion resistance of the equivalent monolithic alloy. Most critically, the careful control of heat input makes it possible to control weld dilution to less than 5%, which is critical for many high-performance alloys.

Thermal spraying provides increased resistance to high temperatures and oxidation, traction, cavitation, 73757_Tectra Automation_Pump and Valves.indd 1

2016/08/11 4:27 PM

Pipes, Pumps and Valves Africa - Jan/Feb 2018

15

VALVES

New Venturi valve cuts retraction time for single acting cylinders after lifting

Leading high pressure, hydraulic cylinder maker, Enerpac, announces a new Venturi valve to speed up the retraction time for single-acting, spring and load return cylinders after lifting projects. Attached to an electric pump, the valve allows cylinder retraction as much as three times faster than conventional manual methods; independent of load.

Until now, retracting single acting cylinders to their original closeda position has been time consuming and laborious using a combination of gravity, applying a load, and (optional) spring, to force the hydraulic oil out of the cylinder and back into the reservoir.

By routing pump flow through the Venturi valve, it creates a vacuum-like effect in the pump system drawing the oil from the cylinder back to the pump’s reservoir at a much faster rate and increasing the retraction speed of the plunger by up to three times.

“The Venturi valve has been developed by Enerpac in response to users requests for a quicker way of retracting hydraulic cylinders especially on-site. Often there is little available space above the cylinder once the load has been removed which can mean waiting for gravity to take effect.

The Venturi valve is a far quicker alternative,” says Fred Weber, commercial marketing manager, Enerpac EMEAI. Venturi valves are supplied as retrofit kits to upgrade Enerpac pumps and available in both manual and electric configurations.

High Tonnage Cylinders Venturi valves are an excellent choice for improving the efficiency of high tonnage cylinders where the retraction

16

Pipes, Pumps and Valves Africa - Jan/Feb 2018

speed may be slower than desired. Also, for those instances when the load is removed from a cylinder and the plunger will not fully retract without additional equipment to force the plunger back into the base of the cylinder.

Contact Enerpac Europe, Middle East, Africa, India: Karel R. van Galen, Marketing Communications, karel.van.galen@enerpac.com, Tel: 0031 318 53 5916. www.enerpac.com.

A.C. Valves cc: 20 years in action

Locally Manufactured

Valves

The owners Andrew Bergstorm and Collin Scott established A.C. Valves cc from very humble beginnings in 1998 with the aim to recondition valves, and since has grown into a medium sized enterprise, based in Knight, Germiston.

A.C. Valves cc, manufacture and supply Knife Gate Valves to the Mining Industries, Department of Water and Sanitation, Paper and Pulp, and Chemical Industries. We also manufacture on customer request and specification.

At A.C. Valves cc we are constantly striving for product excellence, working hand in hand with customer at all times.

Local Manufacturing: A.C. Valves cc manufacture all of its valves locally.

3 Staal Road, Knights, Germiston P.O. Box 13557 Elspark 1418 Tel: +27 (0)11 822 2358 Fax: +27 (0)86 504 2119 Cell: +27 (0)82 467 1200 Andrew Cell: +27 (0)82 467 1196 Collin E-mail: acvalvescc@mweb.co.za Website: www.acvalvescc.co.za

Quality Control: To provide quality products and services, we have very strict internal quality control, there for testing is done to all valves manufactured by us.

BMG has recently been appointed by SAFi Thermoplastic Valve Solutions VALVES

BMG has recently been appointed by SAFi Thermoplastic Valve Solutions as sole distributors of SAFi thermoplastic industrial valves in sub-Saharan Africa.

“BMG’s strategy to enhance its fluid technology division, incorporates the introduction of new products, with the latest developments in design technologies, materials and coatings, that meet exact market demand,” explains Willie Lamprecht, national product manager, Industrial Valves, BMG. “Extreme care is taken in premium brand selection, to ensure product reliability, standardisation, flexibility, low maintenance and extended service life.”

“The company’s 24-hour process support services for production efficiency and reliability-centred maintenance, ensure optimum efficiency and increased service life of every system. With broad technical capabilities, the team is able to solve problems in applications where conventional components have failed after short periods of service.

“BMG’s expansion programme in the fluid technology sector also involves increasing product stockholdings through more than 130 BMG branches and a wide distribution network in sub-Saharan Africa.”

New to BMG’s extensive valves portfolio, are SAFi thermoplastic industrial valves, designed to handle corrosive and abrasive materials in demanding industries, including chemical and petrochemical plants, mining, water treatment, transport and logistics, marine, food production, energy and agriculture.

The SAFi range, which conforms to stringent international quality specifications, incorporates ball, butterfly, diaphragm and non-return valves, as well as strainers and tank fittings – all manufactured from high quality non-corrosive materials.

SAFi’s lightweight polymer materials are integrated with a robust valve design for reliable performance, easy installation and low maintenance, reduced operational costs and extended service life.

These materials all have features for high corrosion and abrasion resistance. Glass reinforced Polypropylene (GRPP) with excellent mechanical and UV resistance, is suitable for use in water treatment and recycling.

Polyvinylidene Fluoride (PVDF) has a smooth surface which prevents the development of micro-organisms, which is necessary in food production. Polypropylene (PPH) materials, suitable for use in marine applications, have good chemical resistance, particularly to salts, acids and alkali. PPH thermoplastic materials, with carbon fibres, are semi-conductive and are compliant 18

Pipes, Pumps and Valves Africa - Jan/Feb 2018

BMG distributes a wide range of valves that ensures reliable and continuous performance in the most demanding industries, including corrosive and hazardous environments. New to this portfolio are SAFi thermoplastic industrial valves, designed to handle highly corrosive and abrasive materials.

with ATEX specifications for safe use in hazardous environments and potentially explosive atmospheres.

A critical advantage of thermoplastic materials over conventional alloy metals, is resistance to corrosion of the most aggressive chemicals.

BMG specialists recommend SAFi thermoplastic ball valves for use in on/off regulation applications. These thermoplastic ball valves are maintenance-free and have the ability to close faster, also ensuring extended service life.

Typical applications for SAFi products in the mining sector are in heap leaching, electrowinning, solvent extraction and acid plants.

Contact Willie Lamprecht, National Product Manager, Industrial Valves, BMG, Cell: +27 (0) 72 326 4832, Tel: +27 (0) 11 620 1581 or +27 (0) 11 955 1119, williaml@bmgworld.net, www.bmgworld.net

DPI Trading supplies pipe fittings to Ruwacon Civils for Nduli Reservoir DPI Trading has supplied a range of pipe and fittings to Ruwacon Civils of Bloemfontein, the main contractor on the Nduli Reservoir project in Ceres for the Witzenberg Municipality.

PIPES

T

he 4.5 megalitre reservoir will not only supply water to the existing Nduli community, but also cater for future low-cost housing developments, Ruwacon Civils Construction Manager Adriaan Liebenbergh highlights.

The project commenced in March, and is scheduled for completion at end January 2018.

DPI Trading’s component of the project comprised the supply of Grade 316 steel pipe and fabricated fittings (200 mm, 250 mm, and 400 mm diameters). In addition, it supplied a small quantity of HDPE and uPVC pressure pipes.

“We were successful in securing this contract due to the fact that we were able to supply a full basket of products, which means no need to deal with multiple suppliers. Our pricing is also highly competitive, in addition to offering technical advice and support where needed, such as alternative jointing options, depending on the materials and requirements,” DPI Trading Sales Agent Clayton van der Nest explains.

The project posed various technical challenges, including the connection from a larger to a smaller reservoir, which required water levels to be balanced. In addition, a variation on the original contract called for the upgrade and replacement of corroded steel piping.

Ruwacon Civils is one of a few construction companies with 51% black ownership, and a 9GBPE CIDB rating. It has a yearly turnover of over R1 billion, a workforce of about 1 500, and is currently engaged on about 70 active sites across

Southern Africa. Projects completed recently include the R199 million St Patrick’s Hospital in Bizana for the Eastern Cape Department of Health, and the R189 million Busamed Harrismith Private Hospital in the Free State.

DPI Trading has a longstanding relationship with Ruwacon Civils, having collaborated with the civil contractor on various water and sewer projects through the years. Based at Bellville in the Western Cape, DPI Trading is a division of the larger national Incledon Group.

Contact Martine Goodchild, DPI Plastics, Tel: +27 (0) 21 957-5600, Fax: +27 (0) 86 505-6484, mgoodchild@dpiplastics.co.za, www.dpiplastics.co.za Pipes, Pumps and Valves Africa - Jan/Feb 2018

19

Basic Description

ANSI Process Pumps

ANSI Process pumps are the only dimensionally standard pump type (e.g., comparable sizes of all manufacturers have identical envelope and interface dimensions.)

ANSI process pumps are, by definition, a horizontal, end suction, single stage pump.

Key Features

Considered an end suction pump, frame mounted.

Normally supplied with open impellers. Dimensionally standard sizes supplied by all manufacturers. Available in a wide variety of alloys and non-metals for many corrosive services.

Applications Used

Transfer and process applications in chemical plants, pulp and paper mills, refineries, food processing plants, and general services in manufacturing plants of all types.

Recommended Media (Fluid)

Transfer and process applications in chemical plants, pulp and paper mills, refineries, food processing plants, and general services in manufacturing plants of all types.

Advantages

Flow Rate Ranges

Dimensional standardisation allows the complete piping, foundation, and building design to be completed before the pump supplier is chosen. Also, this permits the pump brand to be switched in the field without having to re-pipe or modify the motor, coupling, or bedplate. This pump type has more material options than other types.

19 - 757,080 lpm

Total Head (Pressure) Ranges 3 - 2,286 m

Horse Power Ranges 0.125 - 5,000 hp

CHEMICAL PROCESS PUMPS ANSI • Semi open impeller • Handle solids up to 25mm.

• Back pull out feature • Horizontal suction and Vertical discharge • Suitable for standard & heavy duty applications

CLT

MAXIMUM FLOW (m3/h)

ANSI

2

900

3

140

260˚C

CLT

2

1050

3

140

180˚C

CLB

2

450

3

140

180˚C

CLT & CLB • High interchangeability of parts • Suitable for clean liquids & highly aggressive chemicals.

• Excellent hydraulic performance with low N.P.S.H required values.

Est. 1932 Pipes, Pumps and Valves Africa - Jan/Feb 2018

MINIMUM HEAD (m)

• • • •

MAXIMUM HEAD (m)

CLB

MINIMUM FLOW (m3/h)

RA PUMP RANGE

20

ANSI

MAXIMUM TEMPERATURE

Horizontal suction and Vertical discharge Standard flanges conform to DIN 2543 PN16.

The wet end components made out of high grade Cast Stainless Steel The entire range offers a high interchangeability, thus reducing spares stock holding.

08600 RAPID www.rapidallweiler.co.za

AODD Pumps

Basic Description

AODD pumps are any type of reciprocating diaphragm pump containing two diaphragms and driven by air instead of by electric motor.

Key Features

Air section with shuttle valve applies air alternately to the two diaphragms. Each diaphragm has a set of check valves.

Applications Used

Many applications in general plant service where electricity isn’t available, or where the liquid being pumped has high solids content or high viscosity.

Recommended Media (Fluid)

Wide range of liquids, including liquids containing solids, and corrosive liquids.

Advantages Flow Rate Ranges 1 - 1,136 lpm

Total Head (Pressure) Ranges

Can be used where no electricity is available, if compressed air is available. Available in a variety of metal and non-metallic materials depending on the fluid pumped. Able to pump liquids containing large solids. Pump is sealless and can run dry.

.7 - 9 bar

Horse Power Ranges 0.25 - 30 hp

API Process Pumps

Basic Description

The API pump type applies to pumps built to the API 610 standard for pumps for refineries, pipelines, and other hydrocarbon processing applications. It includes end suction, horizontal split case, vertical turbine, and other types.

Key Features

Meets API 610 standard for hydrocarbon services.

Includes closed impellers, with locked wearing rings.

Normally centerline mounted to minimise thermal movement

Applications Used

Hydrocarbon transfer and processing services in refineries, pipelines, and hydrocarbon processing plants.

Recommended Media (Fluid) Crude oil and all types of hydrocarbons.

Flow Rate Ranges 38 - 37,854 lpm

Total Head (Pressure) Ranges

Advantages

Meets API 610 requirements, assuring safety and reliability for high pressure, high temperature hydrocarbon services.

22 - 3251 bar

Horse Power Ranges 1 - 5,000 hp Pipes, Pumps and Valves Africa - Jan/Feb 2018

21

Axial Flow Pumps

Basic Description

Axial Flow pumps are a very high flow, low head type of pump. Also called a propeller pump.

Key Features

Single stage, high specific speed impeller for high flow low head.

Applications Used

Flood dewatering, power plant circulating water pump, evaporator services, and irrigation.

Recommended Media (Fluid)

Water and relatively thin liquids. Can pump liquids with or without solids if proper impeller type is chosen.

Advantages Flow Rate Ranges

This pump type is the best type to achieve very high flow rate with very low head, a hydraulic requirement needed for certain applications such as flood dewatering.

18,927 - 757,08 lpm

Total Head (Pressure) Ranges 4 - 13 psi

Horse Power Ranges

Booster Pumps

10 - 1,500 hp

Basic Description

Booster pumps are used to further boost the pressure in a system. It may be an end suction, in-line circulator, horizontal split case, or vertical turbine in a can type of pump.

Key Features

Booster pumps are almost always a multi-stage pump (has more than one impeller). All other features are quite specific to the application.

Applications Used

Potable water distribution, irrigation booster, cooling water booster, process booster service

Recommended Media (Fluid)

Water and relatively thin liquids (won’t pump thicker oils). Normally not used for liquids containing solids.

Available in alloys for corrosive services.

Flow Rate Ranges 19 - 37,854 lpm

Total Head (Pressure) Ranges 87 - 3,251 psi

Horse Power Ranges 1 - 5,000 hp 22

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Advantages

Allows the building up of additional pressure that is required to move liquid a long distance or to use the high pressure for spraying or other services.

Canned Motor Pumps

Basic Description

Canned Motor pumps are sealless centrifugal pumps.

The impeller is directly attached to the moter rotor, with a can separating the wetted rotor from the motor stator.

Key Features

Pump and motor are close coupled, so no mechanical seal. Pump rotor includes a circulating path of pumped liqued to lubricate sleeve bearings and thrust surfaces.

These wear areas are made of ceramic, silicon carbide, or tungsten carbide.

Applications Used

Pumping chemicals, hydrocarbons, or other liquids that are difficult to seal. or where the consequences of leakage are serious. Pumping heat transfer fluids which are high temperature of which are prone to costly evaporative losses with traditional mechanical seals.

Recommended Media (Fluid) Flow Rate Ranges 19 - 5,678 lpm

Total Head (Pressure) Ranges 11 - 173 psi

All types of thin (non-viscous liquids).

Advantages

Eliminates the mechanical seal, one of the largest components of pump maintenance cost. Plus, the pump is assured to be leak-free.

Horse Power Ranges 0.5 - 300 hp

Chopper Pumps

Basic Description

Chopper Pumps are a type of centrifugal pump that is designed to chop up solids and stringy material as it pumps. It is available in a vertical column and end suction configuration.

Key Features

Pump impeller contains heavy duty grinding teeth, and many have replaceable wear plates in the casing, to allow chopping of solids as the pump operates.

Applications Used

Chopper pumps are used in applications that plug conventional solids handling wastewater pumps in industrial, chemical, and fool processing facilities.

Recommended Media (Fluid)

Liquids containing solids and stringy material that would otherwise be difficult to pump.

Flow Rate Ranges 189 - 37,854 lpm

Advantages

Able to pump liquids containing long stringy materials or other solids that would plug up in other pump types.

Total Head (Pressure) Ranges 7 - 87 psi

Horse Power Ranges 1 - 500 hp Pipes, Pumps and Valves Africa - Jan/Feb 2018

23

Centrifugal Pumps Basic Description

General name for pumps with one or more impellers. Many types and configurations for different applications.

Key Features

One or more impellers. Casing is volute or diffuser type. Normally electric motor driven, but other drive types available.

Applications Used

All sorts of liquids can be pumps with centrifugal pumps. Highest flow rates of all pump types. Handles clean or dirty liquids, and liquids with low viscosity. Liquid should not contain air or vapors.

Recommended Media (Fluid)

Water and relatively thin liquids (won’t pump thicker oils). Can pump liquids with or without solids if proper impeller type is chosen. Available in alloys for corrosive services.

Advantages

Best pump choice for lower viscosity (thin) liquids and high flow rates. No pulsations that may be found in some positive displacement pumps.

24

Flow Rate Ranges

Total Head (Pressure) Ranges

Horse Power Ranges

19 - 757,080 lpm

3 - 2,286 m

0.125 - 5,000 hp

Pipes, Pumps and Valves Africa - Jan/Feb 2018

TO EN733 (DIN 24255)

END SUCTION CENTRIFUGAL PUMPS

NSHD

NT

NB

MINIMUM FLOW (m3/h)

MAXIMUM FLOW (m3/h)

NT & NSHD

2

1100

3

140

160˚C

NB

2

530

3

140

160˚C

NTT / NIT

2

530

3

140

160˚C

RA PUMP RANGE

MINIMUM HEAD (m)

NTT

NT, NSHD & NB MONOBLOCK • Suitable for clean liquids which are not chemically aggressive to the pump materials.

• Standard as single stage pumps with a variety of sizes offering a two stage options.

• Interchangeability - The entire range offers 40 different sizes, utilizing only 5 bearing brackets, therefore allowing for less stock holding.

• Pump Flanges are rated for 10 bar and drilled to EN 1092.1 (PN 10/DIN 2532).

•

• •

Two Stage Centrifugal Pumps • Two stage pumps are able to achieve much higher pressures and require substantially lower NPSH. • The versatility of this design allows for conversion from single stage to two stage, or vice versa without the need for machining of the parts.

MAXIMUM HEAD (m)

MAXIMUM TEMPERATURE

Equipped with a safety stuffing box and throttling area in front of the mechanical seal. In case of a seal failure this prevents the pumped liquid from emerging in a hazardous quantity or manner. With drain connection adequate piped up, the safety requirements of DIN 4754 are exceeded. (The pumps have a drain connection to ensure that any seepage past the shaft sealing can be safely drained through this connection).

High temperature bearings are fitted where applicable).

No special motor or coupling guard required due to unique heat dissipation design.

HIGH PRESSURE MULTISTAGE - L • This pump design simulates pumping in series at a fraction of the cost, utilizing closed impellers separated by interstage casings and diffusers.

• The shaft is sealed by packed gland or mechanical seal arrangement.

• Replaceable shaft sleeves are fitted as standard.

• Suction flanges PN16/DIN 2533, delivery flanges PN40/DIN 2535.

• Pumps are driven from the suction end and the direction of rotation is clockwise.

• Grease lubricated grooved ball bearings are arranged on each side of the bearing housing brackets to absorb any residual forces.

THERMAL OIL - NTT • Thermal oil pumps capable of handling temperatures up to 350˚C in heat transfer plants without the necessity for external cooling of the pump.

• The fluids pumped must have lubricating properties and should not contain any solids or abrasive particles, as the non drive end bearing and mechanical seal is lubricated by the pumped liquid.

• The unique heat dissipation design of the bearing housing ensures a reduced temperature at the mechanical seal faces and the bearings.

• Back pull out for ease of maintenance.

L

RA PUMP RANGE L

MINIMUM FLOW (m3/h) 3

MAXIMUM FLOW (m3/h)

MINIMUM HEAD (m)

1000

Est. 1932

6

MAXIMUM HEAD (m) 1000

MAXIMUM TEMPERATURE

SUCTION PRESSURE

INTERNAL PRESSURE

160˚C

Up to 10 bar

Up to 25 bar

SPEED Up to 3500 rpm

08600 RAPID Pipes, Pumps and Valves Africa - Jan/Feb 2018 www.rapidallweiler.co.za

25

Circular Pumps

Basic Description

Circulator pumps is generally a pump with in-line suction and discharge flanges.

Key Features

In-line suction and discharge piping connections. Pump may be equipped with a traditional motor and coupling, or may have a wetted rotor motor that eliminates the seal.

Applications Used

Circulator pumps are used in HVAC systems in buildings (chilled water circulation, hot water circulation, potable water circulation). Also circulation of cooling water in plants.

Recommended Media (Fluid) Water and relatively thin liquids.

Flow Rate Ranges

Advantages

In-line design saves on floor space.

19 - 2,839 lpm

Total Head (Pressure) Ranges 9 - 78 psi

Horse Power Ranges

Concrete Pumps

1 - 50 hp

Basic Description

Concrete pumps are a type of reciprocating positive displacement pump that is specially designed to pump concrete and other mixed aggregate solutions.

Key Features

High pressure discharge for pumping concrete long distances or up high elevations. Materials of construction that can handle the abrasive aggregate.

Applications Used

Concrete pouring, construction projects.

Recommended Media (Fluid) Concrete and other aggregate solutions.

Advantages Flow Rate Ranges  38 - 3,785 lpm

Total Head (Pressure) Ranges 2 - 69 bar

Horse Power Ranges 10 - 500 hp 26

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Best way to move concrete long distances and up heights during pour.

Cryogenic Pumps

Basic Description

Cryogenic pumps are used to handle very low temperature liquids.

Key Features

Special materials, seals, and clearances to tolerate very low temperatures.

Applications Used

Low temperature applications in process industries, LNG supply, and semiconductor manufacturing.

Recommended Media (Fluid) Ideal for very low temperature liquids.

Advantages Flow Rate Ranges

Able to tolerate the low temperatures found in certain applications.

19 - 3,785 lpm

Total Head (Pressure) Ranges 11 - 434 psi

Horse Power Ranges 0.5 - 500 hp

Diaphragm Pumps

Basic Description

Diaphragm pumps are a type of reciprocating positive displacement pump in which liquid is pumped by a reciprocating diaphragm, which is driven by a solenoid, a mechanical drive, or a fluid drive. Other versions are air operated (see AODD type below). Pump has inlet and outlet check valves.

Key Features

Pump contains reciprocating diaphragm and inlet and outlet check valves.

Applications Used

Many applications in general plant service where the liquid being pumped has high solids content or high viscosity.

Recommended Media (Fluid)

Wide range of liquids, including liquids containing solids, and corrosive liquids.

Flow Rate Ranges 4 - 6,814 lpm

Total Head (Pressure) Ranges

Advantages

Handles a wide range of liquids, including liquids containing solids. Pump is sealless, and can run dry without damaging the pump.

2 - 1,034 bar

Horse Power Ranges 0.5 - 2,000 hp Pipes, Pumps and Valves Africa - Jan/Feb 2018

27

Drum Pumps

Basic Description

Drum pumps are used to pump small quantities of liquid out of drums and carboys. Pump is very slim to fit in drum opening. Normally supplied as centrifugal pump, but positive displacement pump types are available for thicker liquids and pastes.

Key Features

Small diameter tube surrounding the shaft fits into the opening of a 55 gallon drum. Normally has a handtrigger controlled motor.

Applications Used

Pumping small quantities of liquids out of 55 gallon drums and larger carboys.

Recommended Media (Fluid)

Wide variety of thin and thick liquids, including corrosive liquids.

Flow Rate Ranges 2 - 265 lpm

Advantages

Very practical way to pump small amounts of various fluids that are stored in drums or carboys.

Total Head (Pressure) Ranges 9 - 33 psi

Horse Power Ranges

End Section Pumps

0.25 - 1 hp

Basic Description

End suction pumps are the common type of centrifugal pump. Has horizontal shaft with overhung impeller.

Flow goes in the end of the casing, and out the top.

Key Features

Horizontal shaft, single impeller (see multi-stage category for pumps with more impellers). Various impeller types for clean and dirty services, many material options

Applications Used

Any transfer or circulation of liquid. Handles clean or dirty liquids, and liquids with low viscosity. Liquid should not contain air or vapors.

Recommended Media (Fluid)

Water and relatively thin liquids (won’t pump thicker oils). Can pump liquids with or without solids if proper impeller type is chosen. Available in alloys for corrosive services.

Flow Rate Ranges 19 - 26,498 lpm

Total Head (Pressure) Ranges 4 - 325 psi

Horse Power Ranges 0.125 - 250 hp 28

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Advantages

Lowest first cost option for most applications. Stocked by most distributors in common sizes.

Fire Pumps

Basic Description

Centrifugal pump used for fire fighting in buildings, plants, and other locations. May meet UL/NFPA standards for fire pumps. Normally this is a horizontal split case or vertical turbine pump for UL/FM services.

Non listed pumps may be end suction type.

Key Features

Listed pumps meet the requirements of UL/FM for firefighting services.

Applications Used

Fire fighting services of all types, both UL/FM listed and unlisted.

Recommended Media (Fluid) Water

Advantages Flow Rate Ranges 76 - 18,927 lpm

Meets requirements of UL/FM for fire fighting pumps.

Suppliers often include complete system, including engine and controls.

Total Head (Pressure) Ranges 43 - 520 psi

Horse Power Ranges 10 - 800 hp

Flexible Impeller Pumps

Basic Description

Flexible impeller pumps are a type of rotary positive displacement pump that has a rotating rubber impeller with vanes that bend and then straighten as the impeller rotates to conform to the internal cam in the pump casing.

Key Features

Various rubber materials available compatibility with the fluid pumped.

for

correct

Applications Used

Used as bilge and ballast pumps in small and medium marine services. Also found in other applications in plants where fluids contain some solids.

Recommended Media (Fluid)

Water, seawater, and other thin liquids, including liquids containing some solids.

Flow Rate Ranges 19 - 568 lpm

Total Head (Pressure) Ranges

Advantages

Relatively low cost way to move liquids containing some amounts of solids. system, including engine and controls.

.7 - 4 bar

Horse Power Ranges 0.25 - 10 hp Pipes, Pumps and Valves Africa - Jan/Feb 2018

29

Gear Pumps

Basic Description

Gear pumps are a type of rotary positive displacement pump in which liquid is pumped by passing between two meshing gears and the surrounding casing. There are internal and external gear types.

Key Features

Internal and external gear types. Typically doesn’t handle solids or abrasive liquids.

Applications Used

Most common pump for clean oils and other viscous liquids.

Recommended Media (Fluid)

Oils and other high viscosity liquids. Usually only suited for clean liquids (no solids).

Advantages Flow Rate Ranges

Most widely used for clean oil services. Few moving parts, simple construction.

4 - 5,678 lpm

Total Head (Pressure) Ranges .7 - 138 bar

Horse Power Ranges

Grinder Pumps

0.5 - 2,000 hp

Basic Description

Grinder pumps are a type of submersible sewage pump that has cutting teeth incorporated onto the impeller, to grind the sewage for pressure sewer applications.

Also available in progressing cavity pump positive displacement type.

Key Features

Grinding teeth on the inlet of the impeller, submersible motor.

Applications Used

Residential pressure sewer systems.

Recommended Media (Fluid) Sewage and other wastewater.

Advantages Flow Rate Ranges 19 - 189 lpm

Total Head (Pressure) Ranges 22 - 65 psi

Horse Power Ranges 0.5 - 5 hp 30

Pipes, Pumps and Valves Africa - Jan/Feb 2018

This type of sewage pump allows smaller diameter sewage lines than typical gravity drain sewers. Also, the sewer lines can follow the contour of the land since they don’t have to continuously drain to the collection point.

Horizontal Split Case Pumps

Basic Description

Horizontal Split Case pumps are a types of centrifugal pump type has a single double suction impeller supported between bearings. Casing is split horizontally for maintenance. Suction and discharge flanges are opposed to each other.

Key Features

Double suction impeller gives better NPSH and lower axial thrust. Casing is normally double volute, to reduce radial bearing loads. Pump has two seals, both sealing suction pressure.

Applications Used

Usually higher flow rate applications than end suction pumps. Used for cooling water, plant make-up water, potable water distribution, fire pumps, pipelines, and other main process flows.

Recommended Media (Fluid)

Water and relatively thin liquids (won’t pump thicker oils). Normally not used for liquids containing solids.

Available in alloys for corrosive services.

Flow Rate Ranges

Advantages

379 - 378,540 lpm

This pump type permits much higher flow rates than end suction pumps. The double suction impeller has no axial thrust loads, and is less likely to cavitate.

Total Head (Pressure) Ranges 22 - 650 psi

Horse Power Ranges 3 - 5000 hp

HORIZONTAL SPLIT CASE PUMPS APPLICATION

HSC

RA PUMP RANGE HSC

MINIMUM FLOW (m3/h)

MAXIMUM FLOW (m3/h)

70

20 000

HSC • Axially split centrifugal pumps which are capable of generating high flow rates for various applications.

• The impeller which is situated between the bearings offers reliable and maintenance free operation.

• The double suction principal results in high efficiencies further resulting in economical operation in terms of power.

Est. 1932

• • • • •

Raw Water In-take Systems Power Generation Water Treatment Works General Industry Cooling Tower Applications

MINIMUM HEAD (m) 10

• • •

MAXIMUM HEAD (m)

MAXIMUM TEMPERATURE

170

105˚C

Available in sizes from 80mm to 2400mm discharge and can generate heads up to 170 meter.

Low NPSH requirements which adds to their suitability for various applications.

Available with gland packing or mechanical sealing.

08600 RAPID www.rapidallweiler.co.za

Pipes, Pumps and Valves Africa - Jan/Feb 2018

31

Helical Rotor Pumps

Basic Description

The ECO Pump Range is manufactured in different sizes & various materials to suit specific applications and conditions. 100% local manufacture ensuring availability, spares & on-site assistance at cost effective pricing with a complete design team for your projects from idea concept to finished product.

Key Features

Wide variety of materials to be manufactured in, 90% Flow accuracy, constant & continuous flow regardless of pressure, naturally removes air from the line, high pressure developed at low volumes

Applications Used

Mining, Explosives, Agricultural, Chemical, Paper & pulp, Ceramics, Food, Sugar, Cosmetics, Concrete, Sewage & Waste Water, Industrial

Recommended Media (Fluid)

Wide range of liquids from water to molasses can be pumped, there is no liquid media it cannot move.

Flow Rate Ranges 4 - 2000 lpm

Total Head (Pressure) Ranges 1 - 15 bar

Advantages

Helical rotor design doesn’t interfere with the makeup of the product, Viscosities up to 800 000 centipoise movable, flexible pump designs, Solid shafts & sealed joints eliminates contamination

Horse Power Ranges

Jet Pumps

0.5 - 2000 hp

Basic Description

Jet pumps are a type of home water well pump that is used for lower flow rates than vertical turbine types. It is a horizontal end suction pump, put makes use of an ejector to assist the flow.

Key Features

Horizontal end suction pump with ejector either mounted on the pump (for shallow well services), or located down in the well.

Applications Used Domestic water wells

Recommended Media (Fluid) Water

Advantages Flow Rate Ranges 4 - 265 lpm

Total Head (Pressure) Ranges 9 - 87 psi

Horse Power Ranges 0.5 - 5 hp 32

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Lower cost domestic well pump than submersible.

Lobe Pumps

Basic Description

Lobe pumps involve two shafts drive lobes which mesh with each other, but do not touch due to the use of timing gears. This allows gentle pumping of liquids containing soft or fragile solids, or viscous liquids.

Key Features

Pump has timing gears so that lobes don’t contact each other while pumping. Available in sanitary options for food, pharmaceutical, and biotech services.

Applications Used

Available in sanitary options for food, beverage, pharmaceutical, and biotech applications.

Recommended Media (Fluid)

Liquids which are viscous or which contain fragile solids or are shear sensitive.

Advantages Flow Rate Ranges 95 - 11,356 lpm

Total Head (Pressure) Ranges

This is the normal pump of choice for sanitary applications pumping viscous liquids or liquids containing fragile solids. No metal to metal contact inside the pump.

3 - 31 bar

Horse Power Ranges 1 - 500 hp

Basic Description

Magnetic Drive Pumps

Magnetic drive pumps are a type of sealless centrifugal pump. It transmits the torque from the motor to the impeller by means of a rotating outer magnet which transmits the magnetic flux through a can to an inner magnet that is attached to the impeller. The inside of the can is thus isolated, with no shaft penetration, and the seal is eliminated.

Key Features

Magnets are typically made of ceramic, samarium cobalt, or neodymium. Bushings and thrust surfaces inside the can are made of silicon carbide or tungsten carbide, or ceramic, to handle the potentially abrasive liquid that circulates inside the can. Most must be protected against loss of flow, which could seriously damage the pump due to temperature build-up due to the magnetic flux.

Applications Used

Flow Rate Ranges 19 - 15,142 lpm

Total Head (Pressure) Ranges 11 - 434 psi

Horse Power Ranges 0.5 - 300 hp

Pumping chemicals, hydrocarbons, or other liquids that are difficult to seal, or where the consequences of leakage are serious. Pumping heat transfer fluids which are high temperature or which are prone to costly evaporative losses with traditional mechanical seals.

Recommended Media (Fluid) All types of thin (non-viscous liquids)

Advantages

Eliminates the mechanical seal, one of the largest components of pump maintenance cost. Plus, the pump is assured to be leak-free.

Pipes, Pumps and Valves Africa - Jan/Feb 2018

33

Metering Pumps

Basic Description

Metering pumps are a type of reciprocating positive displacement diaphragm pump that has a very low flow rate (typically measured in gallons per hour or per day, rather than per minute). Flow rate is adjustable.

Key Features

Pump is typically a diaphragm style, though older designs are plunger type. Diaphragm is driven by solenoid, mechanical actuation, or hydraulic actuation.

Pump includes inlet and outlet check valves. Normally contains stroke length adjustment to vary flow rate, and some pumps can also control flow rate with speed control.

Applications Used

Used to meter or dose very low flow rates with high accuracy. Most common application is chemical treatment of water in boilers, cooling towers, potable water, etc.

Recommended Media (Fluid) Flow Rate Ranges .038 - 76 lpm

Total Head (Pressure) Ranges .7 - 2 068 bar

Horse Power Ranges

Wide variety of thin and thick liquids, including corrosive liquids.

Advantages

Accurate, repeatable volumetric flow measurement.

Ability to easily adjust the flow rate by adjusting stroke length or speed.

Multistage Pumps

0.125 - 60 hp

Basic Description

Multistage pumps use multiple impellers with either diffusers or volutes generate more head than single stage (single impeller) pumps. Available in horizontal and vertical orientations.

Key Features

Casing may be split radially or axially. Axial thrust may or may not be balanced out, depending on design.

Impellers are enclosed design with diffuser or volute casing.

Applications Used

Higher pressure services such as boiler feed water, condensate, pipelines, reverse osmosis, and decaling.

Recommended Media (Fluid)

Water and relatively thin liquids (won’t pump thicker oils). Normally not used for liquids containing solids.

Available in alloys for corrosive services.

Flow Rate Ranges 19 - 37 854 lpm

Total Head (Pressure) Ranges 87 - 3 251 psi

Horse Power Ranges 1 - 5 000 hp 34

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Advantages

Best ways to get high pressure with a centrifugal pump.

Thrust loads may be lower than single stage designs.

Piston Pumps

Basic Description

Piston pumps are a type of reciprocating positive displacement pump that has, double acting reciprocating pistons.

Key Features

Pump includes one or more double acting pistons, sealed with o-rings against cylinder walls. Pump has an inlet and outlet check valve for each piston.

Applications Used

Used in oil production, in wash down services, pressure washing, car washes, reverse osmosis, and other applications where high pressure is needed.

Recommended Media (Fluid)

Water and other thin liquids, including liquids containing abrasives.

Advantages Flow Rate Ranges 19 - 2 650 lpm

May be better alternative than plunger pump in certain applications, such as abrasive liquids. Slower speeds may mean less maintenance.

Total Head (Pressure) Ranges 3 - 345 bar

Horse Power Ranges 1 - 500 hp

Plunger Pumps

Basic Description

Plunger pumps are a type of reciprocating positive displacement pump that has, typically, three or five single acting reciprocating plungers.

Key Features

Pump includes one or more single acting plungers, sealed with packing against cylinder walls. Pump has an inlet and outlet check valve for each plunger.

Applications Used

Used in oil production, in wash down services, pressure washing, car washes, reverse osmosis, and other applications where high pressure is needed.

Recommended Media (Fluid) Water and other thin liquids, crude oils.

Flow Rate Ranges

Advantages

Best way to achieve very high pressures when pumping.

19 - 4 543 lpm

Total Head (Pressure) Ranges 3 - 6 895 bar

Horse Power Ranges 1 - 5 000 hp Pipes, Pumps and Valves Africa - Jan/Feb 2018

35

Peristaltic Pumps (Hose Pumps)

Basic Description

Peristaltic pumps or hose pumps are a type of rotary positive displacement pump that has a roller or shoe that squeezes a tube or hose as it rotates. The squeezing action moves the liquid along the tube.

Key Features

Includes replaceable hose that must be compatible with the pumped liquid. This hose is typically able to be replaced when worn.

Applications Used

This pump type is used to handle chlorine and other disinfectants in commercial swimming pools, in wineries, in sewage treatment plants, and in many OEM applications where sealless pumping is a plus.

Recommended Media (Fluid)

Wide range of liquids, including liquids containing solids, and corrosive liquids.

Advantages

This pump type requires no seal, and keeps the liquid inside the tube, so zero leakage. single stage designs.

36

Flow Rate Ranges

Total Head (Pressure) Ranges

Horse Power Ranges

.78 - 757 lpm

.7 - 17 bar

0.125 - 40 hp

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Pumps that solve problems Accurate, versatile chemical pumps Cut chemical costs through higher accuracy metering Simple drop-in installation eliminates ancillary equipment Flow rates from 0.1 to 2000 ml/min and up to 7 bar Fully sealed for life, one minute tool-free maintenance REVOLUTIONARY PERISTALTIC PUMPHEAD

Heavy duty pumps for abrasive slurries Pumps with no seals or valves to wear, clog or leak, up to 100 cubic metre/hr to 16 bar Minimal maintenance - just change the hose Suction lift capability to 9.5 metres, self-priming and dry running Ideal for abrasive products, high viscosities and shear sensitive fluids

watson-marlow.com/za-en info.za@wmftg.com

JOHANNESBURG: Tel: +27 11 796 2960 RUSTENBURG: Tel: +27 14 592 0919 CAPE TOWN: Tel: +27 82 776 2872 LIMPOPO : Tel: +27 82 896 9936 Pipes, Pumps and Valves Africa - Jan/Feb 2018

37

Progressive Cavity Pumps

Basic Description

Progressive cavity pumps are a type of rotary positive displament pump that has a single-threaded helically shaped rotor turning inside of a double-threaded helically shaped rubber stator. This produces a progressing cavity that moves the liquid through the pump and pressurises it.

Key Features

Rotor is an interference fit inside the electrometric stator to minimise leakage (slip). Starting torque may be higher than running torque because of this.

Applications Used

Used to pump polymers and dewatered sludge in sewage treatment applications, and in pumping liquids which are viscous or contain solids in industrial plants such as pulp mills, petrochemical, and chemical plants.

Recommended Media (Fluid)

Wide variety of thin and thick liquids, including corrosive liquids and liquids containing solids.

Flow Rate Ranges

Advantages

Sometimes considered the pump of last resort, as it will handle difficult liquids which are viscous or contain solids and which other pump types cannot accommodate.

38 - 9 085 lpm

Total Head (Pressure) Ranges 3 - 138 bar

Horse Power Ranges 1 - 500 hp

POSITIVE DISPLACEMENT SCREW PUMPS PC The progressive cavity pumps are self-priming, rotary displacement ALL-OPTIFLOW® pumps for handling and dosing low to high-viscous, neutral or aggressive, pure or abrasive, gaseous liquids or liquids which tend to froth, even with fibre and solids content.

RA PUMP RANGE PC (ALL-OPTIFLOW®) TWO SCREW THREE SCREW

MAXIMUM FLOW (m3/h)

MINIMUM HEAD (m)

•

MAXIMUM HEAD (m)

MAXIMUM TEMPERATURE

720

10

240

160˚C

1050

3

140

180˚C

450

3

140

180˚C

TWO SCREW •

SN

TWO SCREW

Houttuin, a Circor Business Unit‚ manufactures the twin geared screw pumps in small standard series or are tailor made.

All pumps under go both a hydrostatic test and run test; approximating as near as possible the actual

THREE SCREW • The ALLWEILER three screw pumps are characterized by very high efficiency and reliability. The liquid is moved continuously, without pulsation, turbulence, crushing or loss of lubrication. For overload protection a builtin-pressure relief valve is available.

duty conditions.

Est. 1932 38

Pipes, Pumps and Valves Africa - Jan/Feb 2018

08600 RAPID www.rapidallweiler.co.za

Positive Displacement Pumps

Basic Description

A type of vertical turbine pump designed especially for use in a drilled bore-hole well. Also, for lower flow rates refer to jet pump type above.

Key Features

Available with open and enclosed impellers. Sleeve bearings in pump diffuser bowls are lubricated by liquid pumped. Vertical high thrust motor mounted on top for product lubricated lineshaft bearings, or submersible motor mounted below pump to eliminate lineshaft and lineshaft bearings.

Applications Used

Irrigation, potable water supply, plant make-up water, cooling water, fire pumps, potable water distribution

Recommended Media (Fluid)

Water and relatively thin liquids. Can pump liquids with or without solids if proper impeller type is chosen.

Flow Rate Ranges 189 - 75 708 lpm

Total Head (Pressure) Ranges

Advantages

Only practical way to pump from a deep well. Wide flow and head ranges. Low floor space usage. Immersed pump eliminates priming.

9 - 434 psi

Horse Power Ranges 1 - 3 000 hp

Regenerative Turbine Pumps

Basic Description

Regererative turbine pumps are not considered a true centrifugal, but works on the same kinetic principal as a centrifugal pump.Instead of an impeller with vanes, the turbine impeller has blades similar to turbines, which generate the head. Normally it is end suction, single stage, though multi-stage versions are available.

Key Features

Normally single stage, though multi-sage is available.

Pump has very tight internal clearances, so liquid pumped must be quite clean. Pump has very steep head-capacity curve, so pump must be protected against possibly operating against closed valve.

Applications Used

Small boiler feed pumps for dry cleaners, bakeries, and similar small commercial boilers. Also used in OEM applications such as chiller and laser cooling.

Recommended Media (Fluid) Thin, clear liquids.

Flow Rate Ranges  4 - 757 lpm

Total Head (Pressure) Ranges 22 - 520 psi

Horse Power Ranges

Advantages

Very compact pump for low flow, high head applications.

This may result in space savings and reduced cost for small boiler feed pumps. This pump type handles vapor and air mixed in with the liquid better than traditional centrifugal pumps.

0.5 - 75 hp Pipes, Pumps and Valves Africa - Jan/Feb 2018

39

Self-Priming Pumps

Basic Description

Self-Priming pumps are a type of centrifugal that can be located above the suction reservoir without an external priming system. End suction configuration, but enlarged case to support priming.

Key Features

No need for external priming or foot valves.

Applications Used

Sump pumps and dewatering applications. Transfer services where pump must be located above the suction vessel.

Recommended Media (Fluid)

Water and relatively thin liquids (won’t pump thicker oils). Can pump liquids with or without solids if proper impeller type is chosen. Available in alloys for corrosive services.

Flow Rate Ranges 19 - 26 498 lpm

Advantages

No need for external priming

Total Head (Pressure) Ranges 4 - 152 psi

Horse Power Ranges

Screw Pumps

1 - 150 hp

Basic Description

Screw pumps use two intermeshing screws, driven by timing gears, move oils and other viscous liquids. Also available with three screws, one driving the other.

Key Features

Two screw pumps make use of timing gears so that meshing screws don’t drive each other. Triple screw types have one screw driving the other two and don’t include timing gears.

Applications Used

Fuel transfer, elevators, and other applications requiring relatively high flow rates of viscous liquids.

Recommended Media (Fluid)

Oils, fuels, and other high viscosity liquids. Also handles two-phase liquid/gas mixtures.

Advantages Flow Rate Ranges 189 - 56 781 lpm

Total Head (Pressure) Ranges 3 - 310 bar

Horse Power Ranges 5 - 5 000 hp 40

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Highest flow rate of positive displacement pumps.

Submersible Pumps

Basic Description

Submersible pumps involve a submersible motor with a close coupled to single stage pump that allows the entire assembly to operated submerged.

Key Features

Submerged motor, either air-filled or oil-filled. Different impellers are designed to accommodate solids of various sizes.

Applications Used

Sump pump services, effluent and sewage services ranging in size from products for homes to main sewage treatment plants.

Recommended Media (Fluid)

Water and relatively thin liquids (won’t pump thicker oils). Can pump liquids with or without solids if proper impeller type is chosen.

Advantages Flow Rate Ranges 19 - 28 391 lpm

Total Head (Pressure) Ranges

Eliminates column shaft and bearings found in column sump pump. More compact, reduced sump installation cost. May be located in areas prone to flooding.

4 - 87 psi

Horse Power Ranges 0.25 - 250 hp

THE PUMPS THAT ‘SKRIK VIR NIKS’

SEWAGE CUTTER

..

Soffel

SUBMERSIBLE MOTOR PUMPS (also available in Stainless Steel)

For further information: Tel: (011) 792 9550/1/2 Fax: (011) 792 9553 370 Kruger Rd, Strijdompark, Randburg, South Africa e-mail: eeeaman@mweb.co.za Website: www.ernestee.co.za Pipes, Pumps and Valves Africa - Jan/Feb 2018

41

Slurry Pumps

Basic Description

Slurry pump is a general term for a pump that handles an abrasive slurry. They may be considered an end suction pump, vertical column pump, or submersible pump.

Key Features

Pumps are constructed either of high nickel cast iron (white iron) to withstand the abrasive wear of slurries, or the pump is lined with rubber for more round-edged slurries. Pumps often have replaceable wear plates on one or both sides of the impeller.

Applications Used

Mining, minerals processing, transportation of slurries for processing, and dredging. Also pumps used in slurry applications in coal fired power plants, steel mills, cement mills, etc.

Recommended Media (Fluid) Very abrasive liquids of all types.

Flow Rate Ranges 38 - 113 560 lpm

Total Head (Pressure) Ranges 13 - 108 psi

Advantages

Ordinary pumps wouldn’t withstand the abrasive wear that slurries cause on pump parts. Slurry pumps are designed to handle abrasive slurries and give pumps the longest life possible.

Horse Power Ranges

Trash Pumps

1 - 2000 hp

Basic Description

Trash pumps are a type of self-priming centrifugal or submersible centrifugal pump designed to handle rocks and other solids while dewatering.

Key Features

Open or non-clog enclosed impellers, designed to pass rocks and other debris. Pumps may be self-priming.

Seals usually have hardened faces.

Applications Used

Dewatering construction sites, mines, and utility pits.

Recommended Media (Fluid)

Dirty water containing mud, rocks, stone, and other debris.

Advantages Flow Rate Ranges 19 - 3 785 lpm

Total Head (Pressure) Ranges 11 - 65 psi

Horse Power Ranges 0.25 - 50 hp 42

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Designed to pump the solids and abrasives found in many dewatering applications.

Vane Pumps

Basic Description

Vane pumps use a rotor with vanes located in slots, rotating inside an eccentrically shaped casing. As the rotor turns, the vanes move in and out of the slots.

Key Features

Sliding vanes are often made of carbon.

Applications Used

An alternative to a gear pump for transferring oils and other viscous liquids. Also good for thinner liquids.

Recommended Media (Fluid)

Oils and other high viscosity liquids. Usually only suited for clean liquids (no solids). Also good for thin liquids like gasoline and water.

Advantages Flow Rate Ranges

Good for both thick and thin liquids, so often chosen for terminals and truck unloading where many types of liquids are handled.

19 - 9 464 lpm

Total Head (Pressure) Ranges 1 - 14 bar

Horse Power Ranges 1 - 300 hp

Vertical Sump Pumps

Basic Description

Trash pumps are a type of self-priming centrifugal or submersible centrifugal pump designed to handle rocks and other solids while dewatering.

Key Features

Open or non-clog enclosed impellers, designed to pass rocks and other debris. Pumps may be self-priming.

Seals usually have hardened faces.

Applications Used

Dewatering construction sites, mines, and utility pits.

Recommended Media (Fluid)

Dirty water containing mud, rocks, stone, and other debris.

Advantages Flow Rate Ranges

Designed to pump the solids and abrasives found in many dewatering applications.

19 - 3 785 lpm

Total Head (Pressure) Ranges 11 - 65 psi

Horse Power Ranges 0.25 - 50 hp Pipes, Pumps and Valves Africa - Jan/Feb 2018

43

Vacuum Pumps Basic Description

A vacuum pump is a pump for exhausting gas from an enclosed space. There are various types of vacuum pumps, whose operations are based on numerous physical phenomena: mechanical, jet, sorption and condensate removal pumps. Vacuum pumps are used to remove gas molecules from a sealed space or enclosure leaving a partial vacuum behind.

Key Features

The principal features of vacuum pumps are the ultimate pressure that can be attained by the pump such as: the evacuation rate, the volume of gas that can be pumped out at a given pressure per unit of time and the per miscible outlet pressure in the discharge section of the pump. Innovative research in science and technology has indulged the process in certain industrial applications like sewage systems, automobiles, industrial and pharmaceutical processes etc. Based on this techniques, they are segmented as positive displacement, liquid ring, rotary vane, molecular transfer and entrapment pumps. There are many types of vacuum pumps in the market that make use of several performance measures for measuring the pump capacities such as speed, throughput, mass flow rate etc. These instruments are available in various sizes and capacities.

BEING IN THE BUSINESS FOR MORE THAN 120 YEARS, WE KNOW HOW TO ASSIST YOU. KEW FOUNDRIES focuses on continuous product development and improvement in order to deliver a range of small to large quality castings.

Specialising in all grades of Grey Cast Iron and SG Iron between 1 kg and 10 500 kg, KEW services a variety of markets from its central location in South Africa.

KEW FOUNDRIES has built the expertise that allows the company to service the requirements of the VALVE Industry, PUMP and WATER RETICULATION Industries, Railways, Materials Handling and Rolling Element industries, just to name a few.

Contact us for your casting needs today: Tel: +27 (0) 53 841 0474 Fax: +27 (0) 53 841 0473 e-mail: info@kewfoundries.co.za Web: www.kewfoundries.co.za

44

Pipes, Pumps and Valves Africa - Jan/Feb 2018

ŠCreamer Media 101117CG

SERVICING ALL AREAS IN SOUTH AFRICA FROM KIMBERLEY SINCE 1893

Pipes, Pumps and Valves Africa - Jan/Feb 2018

45

Vertical Turbine Pumps

Basic Description

Vertical sump pumps involve a vertical shaft supported in a center column. Single impeller, open or enclosed, pumps through a volute casing and then out a discharge column pipe.

Key Features

Various impeller types for clean and dirty services.

Sleeve bearings in the column pipe need to be lubricated by the sump water, or externally with water or grease.

Applications Used Sump pump services.

Recommended Media (Fluid)

Water and relatively thin liquids (won’t pump thicker oils). Can pump liquids with or without solids if proper impeller type is chosen. Available in alloys for corrosive services.

Flow Rate Ranges 19 - 28 391 lpm

Advantages

Relatively low cost sump pump. Most designs need no shaft seal, since shaft column not pressurised.

Total Head (Pressure) Ranges 7 - 65 psi

Horse Power Ranges 0.5 - 250 hp

Basic Description

Well Pumps

Vertical turbine pumps are a vertical shaft pump that is designed to fit in a bore-hole well. Can also pump out of open reservoir, river, intake structure, or tank, or can be mounted in barrel for booster pump applications. Pump can have one or more impellers and diffuser bowls, depending on total head requirement.

Key Features

Available with open and enclosed impellers. Sleeve bearings in pump diffuser bowls are lubricated by liquid pumped. Vertical high thrust motor mounted on top for product lubricated lineshaft bearings, or submersible motor mounted below pump to eliminate lineshaft and lineshaft bearings.

Applications Used

Irrigation, potable water supply, plant make-up water, cooling water, fire pumps, potable water distribution, booster pumps, process pumps.

Recommended Media (Fluid) Flow Rate Ranges 189 - 567 810 lpm

Total Head (Pressure) Ranges 7 - 867 psi

Horse Power Ranges 1 - 5 000 hp 46

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Water and relatively thin liquids (won’t pump thicker oils). Can pump liquids with or without solids if proper impeller type is chosen. Available in alloys for corrosive services.

Advantages

Only practical way to pump from a deep well. Wide flow and head ranges. Low floor space usage. Immersed pump eliminates priming. Canned pump version excellent for low NPSH services

From the desk of Pamela du Plessis, Managing Director of Invincible Valves

Maintenance and the planning thereof

Invincible Valves (Pty) Ltd 33 Shaft Road, Knights, Germiston TEL: +27 (0) 11 822 1777 | FAX: +27 (0) 11 822 3666 EMAIL: enquiries@invalve.co.za | WEB: www.invalve.co.za

MRO Maintenance, Repairs and Operations involves maintaining, repairing and replacing if necessary.

Of late you will hear of Predictive Maintenance which uses sensor data to monitor systems, it continuously evaluates and you are then able to check it against historical trends to predict failure before it occurs.

When we talk Valves, maintenance and repairs are essential all year round. Therefore, it is best to have a maintenance plan which includes structured shutdowns which should prevent breakdowns altogether.

Reconditioning and Repairing of valves is done in house on our premises. A number of our esteemed customers enjoy having reconditioned valves in their stores which reduces down time to a minimum. Maintenance planning and scheduled shutdowns allow them to have all goods on hand prior to the event even occuring. After such shutdowns the next batch is sent for reconditioning at a fraction of the price of replacement valves.

We encourage all plants to implement a maintenance plan from the initial build which will include new valves as well as spares. As soon as they use the spares the original valves are sent for reconditioning and repairs. This way you create a revolving stock for your plan.

Down time costs more than reconditioning, we believe in being prepared.

If you dont't have time to do it right, you must have time to do it over

Pipes, Pumps and Valves Africa - Jan/Feb 2018

47

Air Valves

Basic Description

Pressure Type Low Pressure High Pressure

Size

Air valves in pipeline systems serve two primary functions. The first is the release of accumulated air that comes out of solution within a pressurized pipeline. This air will result in bubble formation, which will gather at localized high points along the pipeline profile. This air accumulation will occur when the bubble’s buoyancy is greater than the energy to convey the bubble with the liquid. The air valve used to release this free air is known as an air release valve.

50mm - 300 mm 50mm - 600 mm

Pressure Rating (or imperial Equivalent) PN10 - PN25 PN10 - PN40

% Local Content per unit 70%

Check Valves

70%

Basic Description

Pressure Type Low Pressure High Pressure

Size 80mm - 3500 mm 80mm - 2500 mm

Pressure Rating (or imperial Equivalent) PN6 - PN25 Class 150 - 1500 / Matric PN25 - PN250

% Local Content per unit 70% 70% 48

Pipes, Pumps and Valves Africa - Jan/Feb 2018

A check valve, is a valve that normally allows fluid (liquid or gas) to flow through it in only one direction.

Check valves are two-port valves, meaning they have two openings in the body, one for fluid to enter and the other for fluid to leave. There are various types of check valves used in a wide variety of applications. Check valves are often part of common household items.

Although they are available in a wide range of sizes and costs, check valves generally are very small, simple, or inexpensive. Check valves work automatically and most are not controlled by a person or any external control; accordingly, most do not have any valve handle or stem.

The bodies (external shells) of most check valves are made of plastic or metal. (Non-Return Valve, reflux Valve, Tilting Disk Valve, Double Door, Mu.ti Door, Swing Check)

Ball Valves Basic Description A ball valve is a form of quarter-turn valve which uses a hollow, perforated and pivoting ball (called a “floating ball”) to control flow through it. It is open when the ball’s hole is in line with the flow and closed when it is pivoted 90-degrees by the valve handle. The handle lies flat in alignment with the flow when open, and is perpendicular to it when closed, making for easy visual confirmation of the valve’s status.

It is improvisation of the plug valve.It is basically a ported sphere in a housing.The seat matching the ball is circular so that the seating stress is circumferentially uniform.The seats are usually made up of PTFE which is inert to all chemicals,has low coefficient of friction and resiliency.

Application

It is used for flow and pressure control and shut off and for corrosive fluids,slurries,normal liquid and gases.For high temp and pressure.

Advantages of Ball Valve

Low pressure drop shut-off,quarter turn operation,easy to maintain,low torque.They are small in size and low in weight.

Disadvantages of Ball valve PTFE seats are subjected to extrusion is the valve is used for throttling. Fluid trapped in the ball in the closed position may cause problem of build up of vapor pressure and corrosion.

Pressure Type

Size

Pressure Rating (or imperial Equivalent)

% Local Content per unit

Low Pressure

20mm - 300 mm

PN10 - PN25

70%

High Pressure

20mm - 600 mm

Class 150 - 4500 Matric PN25 - PN450

70%

Pipes, Pumps and Valves Africa - Jan/Feb 2018

49

Butterfly Valves Basic Description

A butterfly valve is a valve which can be used for isolating or regulating flow. The closing mechanism takes the form of a disk. Operation is similar to that of a ball valve, which allows for quick shut off. Butterfly valves are generally favored because they are lower in cost to other valve designs as well as being lighter in weight, meaning less support is required.

The disc is positioned in the center of the pipe; passing through the disc is a rod connected to an actuator on the outside of the valve. Rotating the actuator turns the disc either parallel or perpendicular to the flow. Unlike a ball valve, the disc is always present within the flow, so apressure drop is always induced in the flow, regardless of valve position.

They are rotary valves with a disc rotating at right angles within a pipe section body. The stem passes through the disc is supported by both ends of the body. The shaft is ensured to the disc either by bolts or pins.Rotating stem through 90 degrees.Fully opens or closes the valves.

Application

Large flow control,Low pressure applications where leakage is unimportant.

Advantages of Butterfly Valve

Simple,Compact form,Quick opening,Good control,large flow,low pressure drop, and low weights and costs.

Disadvantages of Butterfly Valve No tight shut off

50

Pressure Rating (or imperial Equivalent)

% Local Content per unit

Pressure Type

Size

Low Pressure

80mm - 3500 mm

PN10 - PN25

70%

High Pressure

80mm - 2500 mm

Class 150 - 1500 Matric PN25 - PN250

70%

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Control Valves

Basic Description

Pressure Type Low Pressure High Pressure

Size

Control valves are valves used to control conditions such as flow, pressure, temperature, and liquid level by fully or partially opening or closing in response to signals received from controllers that compare a “setpoint” to a “process variable” whose value is provided by sensors that monitor changes in such conditions. Control Valve is also termed as the Final Control Element. (Globe Control Valve, Piston Type Control Valve)

25mm - 600 mm 25mm - 600 mm

Pressure Rating (or imperial Equivalent) PN10 - PN25 Class 150 - 4500 / Matric PN25 - PN750

% Local Content per unit 70% 70%

Diaphragm Valves

Basic Description

Diaphragm valves (or membrane valves) consists of a valve body with two or more ports, a diaphragm, and a “weir or saddle” or seat upon which the diaphragm closes the valve. The valve is constructed from either plastic or metal. The flexible diaphragm is connected to a support member known as compressor,which represents the closure member.When the valve is opened the diaphragm is lifted out of the flow path and the fluid has a smooth streamlined flow.When the valve is closed the diaphragm is tightly seated against the seat in the body known as the wier. The diaphragm is of NEOPRENE. (Slurry Valve or Saunders Valve)

Application Used for corrosive liquids at low temp and pressure.

Pressure Type Low Pressure

Size 15mm - 1800 mm

Pressure Rating (or imperial Equivalent) PN6 - PN25

Advantages of Diaphragm Valve

The diaphragm completely keeps the working parts in isolation from the process fluids.Simple in construction,easier to operate and maintain.

Disadvantages Valve

of

Diaphragm

Not for high temp and pressure.

% Local Content per unit 70% Pipes, Pumps and Valves Africa - Jan/Feb 2018

51

Fire Hydrants

Basic Description

A fire hydrant is a connection point by which firefighters can tap into a water supply. It is a component of active fire protection. (Underground) Fire deluge Valve

Pressure Type Low Pressure

Size 65mm inlet

Pressure Rating (or imperial Equivalent) PN16

% Local Content per unit

Knife Gate Valves

70%

Basic Description

Knife gate valves were originally designed for the pulp and paper industry. Stringy pulp would impinge between the wedge and seat of a normal gate valve and prevent flow shut-off. (Spherical Valves, Rotary Valves)

Pressure Type Low Pressure

Size 40mm - 1200mm

Pressure Rating (or imperial Equivalent) PN10 - PN16

% Local Content per unit 70% 52

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Gate Valves

Basic Description

A gate valve, also known as a sluice valve, is a valve that opens by lifting a round or rectangular gate/wedge out of the path of the fluid. The distinct feature of a gate valve is the sealing surfaces between the gate and seats are planar, so gate valves are often used when a straight-line flow of fluid and minimum restriction is desired. The gate faces can form a wedge shape or they can be parallel. The Gate valves are characterized by a siding gate which is moved by the stem perpendicular to the direction flow. (RSVs, Wedge Gates, Slice Valves, Parallel Slides, Penstocks, Bonnet Gates, Scour Valves)

Application It is used for on-off application.Suited for high temperature and pressure use with variety of fluids.They are not primarily used for slurries,viscous fluid etc..

Advantages of Gate Valve

Low pressure drop when fully open and tight sealing

Disadvantages of Gate Valve

Causes vibration,seat disc wear in partial open condition.Slow response characteristics and require large actuating force.

Pressure Type

Size

Pressure Rating (or imperial Equivalent)

% Local Content per unit

Low Pressure

15mm - 1800mm

PN6 - PN25

70%

High Pressure

80mm - 1800mm

Matric PN25 - PN100

70%

Pipes, Pumps and Valves Africa - Jan/Feb 2018

53

Manual Actuator

Basic Description

Manual handwheel actuators are used in applications that require a throttling type of control valve that can be manually operated and set. Capable of giving precise manual throttling control, these actuators can be used on nearly all standard globe-style or angle-style valve body assemblies. A travel indicator on the actuator yoke can provide a visual indication of valve plug position.

(Gearboxes)

Pressure Type Low Pressure

Size -200 000nm torque

Pressure Rating (or imperial Equivalent) N/A

% Local Content per unit 70%

Plug Valves

Basic Description

Plug valves are valves with cylindrical or conically tapered “plugs� which can be rotated inside the valve body to control flow through the valve. The plugs in plug valves have one or more hollow passageways going sideways through the plug, so that fluid can flow through the plug when the valve is open. Plug valves are simple and often economical. It consist of body,plug and cover. The plug is tapered or cylindrical.In the open position,the bore in the plug connects the inlet and outlet ends of the valve providing straight line flow. (Expluding expanding plug Valves) (Double Block & Bleed Valve)

Pressure Type Low Pressure High Pressure

Size 20mm - 600 mm 20mm - 600mm

Pressure Rating (or imperial Equivalent) PN10 - PN26 PN25 - PN100

% Local Content per unit 70% 70% 54

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Application The plug valves are extensively used in refinery,petrochem and chemical industries and for general purpose involving on off services.

Advantages of Plug Valve

Normally small in size,require less headroom and available in wide range of materials.They provide tight shut off,quick opening and low pressure drop.

Disadvantages of Plug Valve Plug valve may be subjected to galling

Pinch Valves

Basic Description

Pinch valves are suitable for handling slurries and solids in suspension, avoiding contact with the valve mechanism and any contamination towards or from the environment. (Slurry Valve)

Pressure Type Low Pressure

Size 50mm - 800mm

Pressure Rating (or imperial Equivalent) PN10 - PN40

% Local Content per unit 70%

Pneumatic Actuators

Spring Return Basic Description

Pneumatic actuators utilize compressed air to generate the operating energy. These actuators are quick to respond, but are not ideal for environments under high pressures, as gas is compressible. Pneumatic actuators can be either spring return or double acting.

Pressure Type Low Pressure

Size

Spring Return – Actuators in a spring return configuration have air/liquid supplied to only one side of the piston, and the energy to move the mechanisms comes from a spring on the opposite side. This configuration uses the air/liquid as energy to open or close the valve, while the spring acts to affect the opposite motion. (Vein type, Linear Type, Scotch Yolk Type, Rotary Type, Double Crank Type, Rack & Pinion Type)

-215 000nm torque

Pressure Rating (or imperial Equivalent) N/A

% Local Content per unit 70% Pipes, Pumps and Valves Africa - Jan/Feb 2018

55

Pressure Reducing Valve

Basic Description

Pressure Regulating Valve (PRV) automatically reduces a higher inlet pressure to a steady lower downstream pressure, regardless of changing flow rate and/or varying inlet pressure. PRVs are installed in water distribution systems throughout the world and are know for their superior performance, reliability and long service life.

(Self-Regualting Valve)

Pressure Type Low Pressure

Size Full Range

Pressure Rating (or imperial Equivalent) Full Range

% Local Content per unit

Safety Valve

70%

Basic Description

A safety valve is a valve which has the function of increasing the safety of a thermal-hydraulics plant.

An example of safety valve could be a pressure safety valve (PSV), i.e. a pressure relief valve (PRV) which automatically releases a substance from aboiler, pressure vessel, or other system, when the pressure or temperature exceeds preset limits. Also pilot-operated relief valves could have the function of safety valves.

(Pressure Valve or Vacuum Valve)

Pressure Type Low Pressure

Size 15mm - 32mm

Pressure Rating (or imperial Equivalent) PN16

% Local Content per unit 70% 56

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Rotary Valves

Basic Description

A rotary valve is a type of valve in which the rotation of a passage or passages in a transverse plug regulates the flow of liquid or gas through the attached pipes.

Key Features In the industry, a rotary valve is used to regulate the flow of a product, usually to reduce the flow rate to a level more suitable to the process being undertaken.

Application Used Typical applications are for; feeding a weighed hopper or for feeding a mill that can be clogged by the product. As part of the material exchange process, the valve is often used as a measuring or metering device.

Recommended Media

A rotary valve in the pharmaceutical, chemical and food industry is used to dose and feed solid bulk products within the processes. An Airlock type rotary valve is often used to enter or extract material from two chambers with different pressure levels.

Advantages of Gate Valve

Structurally sound; exhibit no visually observable plastic deformation in any test and successfully isolated the protection region from flame propagation.

Pipes, Pumps and Valves Africa - Jan/Feb 2018

57

Sleeve Valve

Basic Description

Pressure Type Low Pressure

Size Full Range

Pressure Rating (or imperial Equivalent) PN10 - PN25

% Local Content per unit 70%

58

Pipes, Pumps and Valves Africa - Jan/Feb 2018

The sleeve valve is a type of valve mechanism for piston engines, distinct from the usual poppet valve.

Sleeve valve engines saw use in a number of preWorld War II luxury cars and in the United States in the Willys-Knight car and light truck. They subsequently fell from use due to advances in poppet-valve technology, including sodium cooling, and the Knight system double sleeve engine’s tendency to burn a lot of lubricating oil or to seize due to lack of it. (Fixed Cone Valves, Discharge Valves, Scour Valves, Howell Bunger Valves, Energy Dissipating Valves).

Pumps to the rescue

In drought ridden Cape Town every effort has to be made to save and repurpose water. With a looming deadline of May 11 when the city is expected to run out of water, residents have been restricted to only 50 liters of water per person per day.

Innovation is the order of the day.

As pumps go it is pretty small. Costing less than R200 and fitting nicely in the palm of a grown man’s hand, it is more readily found in the garden than the bathroom.

HIGH QUALITY, COMPETITIVE & TIMEOUS SUPPLY FOR ALL YOUR CASTING NEEDS

STAINLESS STEEL CAST IRON DUCTILE IRON But, with municipal water under severe restriction, water fountains and the like have been banned in Cape Town. At our house, the once pretty fairy garden has shriveled up and dried, much like the rest of the garden. Any sign of a water feature has long disappeared.

SPECIAL ALLOYS

The pump, however, has been hard at work in recent weeks.

Having been fitted with a much longer elastic tube (bought for a whopping R10 at the local hardware) the little pump has become a family’s saving grace.

Moving grey water has become a serious chore.

Walk into any Cape Town household and guaranteed you will be confronted with containers in all shapes and sizes filled to the brim with grey water as they attempt to stretch every last drop of water as far as possible.

Reusing anything from bath and shower water to that from the washing machine and dishes, it’s a tedious and timeconsuming task. Not to mention pretty smelly. Grey water is after all dirty. Sticking one’s hands in ice cold grey water probably holds little appeal for anyone, even when one has a very clear understanding for the necessity of it.

Enter the little water feature pump. Nothing makes life easier in a restricted waterless environment than this little fellow.

What was once a dirty job, is now easily accomplished. Fit the pump into the grey water, direct the tube to whatever container you want it in and hit the on switch.

No longer are buckets of water carried from here to there.

Efficient and fast it does the job far better and without spilling a single drop.

Contact:

DUANE PETERS

+ 27 71 898 8986

VERY SHORT LEAD TIMES IN HOUSE METALLURGIST VERY RESPONSIVE TO CLIENT DEMANDS

Pumps it would seem, do make the world go around. Whether you have water or not.

Pipes, Pumps and Valves Africa - Jan/Feb 2018

59

PUMPS HORIZONTAL SPLIT CASE PUMPS

AIR OPERATED DOUBLE DIAPHRAGM PUMPS

Unique Engineering Unique Engineering Air & Vacuum Technologies T: +27 (0) 861 822-832) +27 (0) 11 318 3241/2/3/4/5 F: +27 (0) 86 522-9188 E: burnm@vactech.co.za W: www.vactech.co.za

T: +27 (0) 11 826 6111 F: +27 (0) 11 826 6162 E: sales@uniqueeng.co.za W: www.uniqueeng.co.za

Air & Vacuum Technologies T: +27 (0) 861 822-832) +27 (0) 11 318 3241/2/3/4/5 F: +27 (0) 86 522-9188 E: burnm@vactech.co.za W: www.vactech.co.za

T: +27 (0) 11 826-6111 F: +27 (0) 11 826-6162 E: sales@uniqueeng.co.za W: www.uniqueeng.co.za SLURRY PUMPS

ANSI PROCESS PUMPS

SAM Engineering SAM Engineering T: +27 (0) 11 823-4250 F: +27 (0) 11 823-4943 E: sales@sameng.co.za W: www.sameng.co.za BOREHOLE PUMPS

Ernest Electro Engineering T: +27 (0) 11 792 9550 E: eeeaman@mweb.co.za W: www.ernestee.co.za

Monitor Pumps & Systems T: +27 (0) 11 618-3860 F: +27 (0) 11 614-0021 E: sales@monitorpumps.co.za W: www.monitorpumps.co.za

T: +27 (0) 11 823-4250 F: +27 (0) 11 823-4943 E: sales@sameng.co.za W: www.sameng.co.za METERING PUMPS

SAM Engineering T: +27 (0) 11 823-4250 F: +27 (0) 11 823-4943 E: sales@sameng.co.za W: www.sameng.co.za

APE Pumps T: +27 (0) 11 824-4810 F: +27 (0) 11 824-2770 E: apepumps@mweb.co.za W: www.apepumps.co.za

Braybar Pumps (Pty) Ltd T: +27 (0) 11 393-7177/79 F: +27 (0) 86 425-7595 E: sales@braybarpumps.co.za W: www.braybarpumps.co.za

Ernest Electro Engineering T: +27 (0) 11 792 9550 E: eeeaman@mweb.co.za W: www.ernestee.co.z

T: +27 (0) 11 876-5600 F: +27 (0) 11 822-2013 E: info-za@ksb.com W: www.ksb.com 60

T: +27 (0) 10 210-4750 E: willie.vanwyk@flsmidth.com W: www.flsmidth.com

Pump and Abrasion Technologies Agrico SPP Pumps SA (Pty) Ltd T: +27 (0) 11 393-7179 F: +27 (0) 86 425-7595 E: sales@spppumps.co.za W: www.spppumps.com FLEXIBLE IMPELLER PUMPS

CHICK HENDERSON Chick Henderson T: +27 (0) 11 624-1400 F: +27 (0) 624-1432 E: rob@chickhenderson.co.za W: www.chickhenderson.co.za HIGH PRESSURE PUMPS

T: +27 (0) 21 950 4111 F: +27 (0) 21 950 4208 E: alfred.andrag@agrico.co.za W: www.agrico.co.za

T: +27 (0) 12 666-0904/5 E: sales@pumpab.co.za W: www.pumpandabrasion.co.za SUBMERSIBLE PUMPS

PLUNGER PUMPS

Hawk High Pressure Pumps T: +27 (0) 031 274-8555 +27 (0) 10 010-0144 F: +27 (0) 31 205-4332 +27 (0) 11 822-2868 E: sales@hawkpumps.co.za W: www.hawkpumps.co.za

Horma Pumps T: +27 (0) 11 452-4300 E: sales@horma.co.za W: www.horma.co.za

POSITIVE DISPLACEMENT PUMPS

Hawk High Pressure Pumps KSB (Pty) Ltd

FLSmidth Krebs

MULTISTAGE PUMPS

Unique Engineering

CENTRIFUGAL PUMPS

T: +27 (0) 11 805-8631 F: +27 (0) 11 805-8630 E: cri@cripumps.co.za W: www.cripumps.co.za

END SUCTION PUMPS

FIRE PUMPS

T: +27 (0) 11 826 6111 F: +27 (0) 11 826 6162 E: sales@uniqueeng.co.za W: www.uniqueeng.co.za

C.R.I Pumps S.A. (Pty) Ltd

T: +27 (0) 031 274-8555 +27 (0) 10 010-0144 F: +27 (0) 31 205-4332 +27 (0) 11 822-2868 E: sales@hawkpumps.co.za W: www.hawkpumps.co.za

Pipes, Pumps and Valves Africa - Jan/Feb 2018

Stewarts & Lloyds (Pty) Ltd CHICK HENDERSON Chick Henderson T: +27 (0) 11 624-1400 F: +27 (0) 624-1432 E: rob@chickhenderson.co.za W: www.chickhenderson.co.za

T: +27 (0) 11 917-0778 F: +27 (0) 11 917-0769 E: peterk@sltrading.co.za W: www.stewartsandlloyds.co.za

VALVES

PUMPS AIR VALVES

SAM Engineering Walter Meano Engineering VersaFlo VSE Pumps T: +27 (0) 11 873-8620 F: +27 (0) 11 825-1401 E: wme@mweb.co.za W: www.versaflo.co.za

T: +27 (0) 11 823-4250 F: +27 (0) 11 823-4943 E: sales@sameng.co.za W: www.sameng.co.za

Tectra Automation

Agrico T: +27 (0) 21 950 4111 F: +27 (0) 21 950 4208 E: alfred.andrag@agrico.co.za W: www.agrico.co.za

T: +27 (0) 11 971-9400 F: +27 (0) 11 971-9440 E: malan.bosman@tectra.co.za W: www.hytecgroup.co.za

TRASH PUMPS

Walter Meano Engineering

C.R.I Pumps S.A. (Pty) Ltd T: +27 (0) 11 805-8631 F: +27 (0) 11 805-8630 E: cri@cripumps.co.za W: www.cripumps.co.za

T: +27 (0) 11 873-8620 F: +27 (0) 11 825-1401 E: wme@mweb.co.za W: www.versaflo.co.za VERTICAL TURBINE PUMPS

Tectra Automation T: +27 (0) 11 971-9400 F: +27 (0) 11 971-9440 E: malan.bosman@tectra.co.za W: www.hytecgroup.co.za BALL VALVES

VACUUM PUMPS

APE Pumps Atlas Copco T: +27 (0) 11 318 3241/2/3/4/5 F: +27 (0) 86 522-9188 E: burnm@vactech.co.za W: www.vactech.co.za

T: +27 (0) 11 824-4810 F: +27 (0) 11 824-2770 E: apepumps@mweb.co.za W: www.apepumps.co.za

Mine Track & Tools (Pty) Ltd T: +27 (0) 11 412 4536/1665 E: info@minetrack.co.za W: www.minetrack.co.za

BUTTERFLY VALVES

VAG-Valves South Africa Klamflex Pipe Couplings T: +27 (0) 11 762-5326 F: +27 (0) 11 762-5674 E: r.loggerenberg@vag-group.com W: www.vag-group.com CHECK VALVES

Invincible Valves (Pty) Ltd T: +27 (0) 11 822-1777 F: +27 (0) 11 822-3666 E: enquiries@invalve.co.za W: www.invalve.co.za CONTROL VALVES

SAMCO PUMPS (Pty) Ltd

Horma Pumps T: +27 (0) 11 452-4300 E: sales@horma.co.za W: www.horma.co.za

T: +27 35 751-1202 F: +27 35 751-1204 E: joffre@samcopumps.com W: www.samcopumps.com WELL PUMPS

VERTICAL SUMP PUMPS

Ainsworth Valves T: +27 (0) 11 433-3968/79 F: +27 (0) 11 433-9107 E: ruben@uvc.co.za W: www.ainsworth-valves.co.za

KSB (Pty) Ltd T: +27 (0) 11 876-5600 F: +27 (0) 11 822-2013 E: info-za@ksb.com W: www.ksb.com

T: +27 (0) 11 433-3968/79 F: +27 (0) 11 433-9107 E: ruben@uvc.co.za W: www.ainsworth-valves.co.za

VAG-Valves South Africa Klamflex Pipe Couplings

C.R.I Pumps S.A. (Pty) Ltd T: +27 (0) 11 805-8631 F: +27 (0) 11 805-8630 E: cri@cripumps.co.za W: www.cripumps.co.za

Ainsworth Valves

Industrial Valves & Engineering Supplies (Pty) Ltd T: +27 (0) 11 394-2066 F: +27 (0) 11 394-2476 E: sales1@industrialvalve.co.za W: www.industrialvalve.co.za

T: +27 (0) 11 762-5326 F: +27 (0) 11 762-5674 E: r.loggerenberg@vag-group.com W: www.vag-group.com DIAPHRAGM VALVES

KSB (Pty) Ltd RNE Pumps (Pty) Ltd T: +27 (0) 11 452-3528 F: +27 (0) 82 612-0358 E: mark@rnepumps.com W: www.rnepumps.com

T: +27 (0) 11 876-5600 F: +27 (0) 11 822-2013 E: info-za@ksb.com W: www.ksb.com

Ainsworth Valves Stewarts & Lloyds (Pty) Ltd T: +27 (0) 11 917-0778 F: +27 (0) 11 917-0769 E: peterk@sltrading.co.za W: www.stewartsandlloyds.co.za

T: +27 (0) 11 433-3968/79 F: +27 (0) 11 433-9107 E: ruben@uvc.co.za W: www.ainsworth-valves.co.za

Pipes, Pumps and Valves Africa - Jan/Feb 2018

61

VALVES SLEEVE VALVES

Mine Track & Tools (Pty) Ltd T: +27 (0) 11 412 4536/1665 E: info@minetrack.co.za W: www.minetrack.co.za

Valcon Valve & Controls T: +27 (0) 11 453-7537 F: +27 (0) 11 453-6056 E: nick@valcon.co.za Web: www.valcon.co.za KNIFE GATE VALVES

Ainsworth Valves T: +27 (0) 11 433-3968/79 F: +27 (0) 11 433-9107 E: ruben@uvc.co.za W: www.ainsworth-valves.co.za

Invincible Valves (Pty) Ltd T: +27 (0) 11 822-1777 F: +27 (0) 11 822-3666 E: enquiries@invalve.co.za W: www.invalve.co.za GATE VALVES

Invincible Valves (Pty) Ltd T: +27 (0) 11 822-1777 F: +27 (0) 11 822-3666 E: enquiries@invalve.co.za W: www.invalve.co.za

VAG-Valves South Africa Klamflex Pipe Couplings T: +27 (0) 11 762-5326 F: +27 (0) 11 762-5674 E: r.loggerenberg@vag-group.com W: www.vag-group.com ACCESSORIES PIPES

Mine Track & Tools (Pty) Ltd C.R.I Pumps S.A. (Pty) Ltd T: +27 (0) 11 805-8631 F: +27 (0) 11 805-8630 E: cri@cripumps.co.za W: www.cripumps.co.za

T: +27 (0) 11 412 4536/1665 E: info@minetrack.co.za W: www.minetrack.co.za PLUG VALVES

KLINGER South Africa T: +27 (0) 11 842-8300 F: +27 (0) 11 827-8663 E: gareth.langton@klinger.co.za W: www.klinger.co.za ENGINEERED PLASTICS

Industrial Valves & Engineering Supplies (Pty) Ltd T: +27 (0) 11 394-2066 F: +27 (0) 11 394-2476 E: sales1@industrialvalve.co.za W: www.industrialvalve.co.za

Invincible Valves (Pty) Ltd T: +27 (0) 11 822-1777 F: +27 (0) 11 822-3666 E: enquiries@invalve.co.za W: www.invalve.co.za

KLINGER South Africa T: +27 (0) 11 842-8300 F: +27 (0) 11 827-8663 E: gareth.langton@klinger.co.za W: www.klinger.co.za MANUAL

PRESSURE REDUCING VALVES

VAG-Valves South Africa Klamflex Pipe Couplings

Valcon Valve & Controls T: +27 (0) 11 453-7537 F: +27 (0) 11 453-6056 E: nick@valcon.co.za Web: www.valcon.co.za REPAIR VALVES

T: +27 (0) 11 762-5326 F: +27 (0) 11 762-5674 E: r.loggerenberg@vag-group.com W: www.vag-group.com To advertise in the Buyers Guide Contact Tel: +27(0)11 475 0010

62

T: +27 (0) 21 950 4111 F: +27 (0) 21 950 4208 E: alfred.andrag@agrico.co.za W: www.agrico.co.za HOSES

CHICK HENDERSON

Chick Henderson T: +27 (0) 11 640-1400 F: +27 (0) 624-1432 E: rob@chickhenderson.co.za W: www.chickhenderson.co.za FOUNDRIES

Invincible Valves (Pty) Ltd T: +27 (0) 11 822-1777 F: +27 (0) 11 822-3666 E: enquiries@invalve.co.za W: www.invalve.co.za

Agrico

Tectra Automation T: +27 (0) 11 971-9400 F: +27 (0) 11 971-9440 E: malan.bosman@tectra.co.za W: www.hytecgroup.co.za MECHANICAL PACKING

KEW Foundries T: +27 (0) 53 841-0474 F: +27 (0) 53 841-0473 E: info@kewfoundries.co.za W: www.kewfoundries.co.za

KLINGER South Africa Ainsworth Valves T: +27 (0) 11 433-3968/79 F: +27 (0) 11 433-9107 E: ruben@uvc.co.za W: www.ainsworth-valves.co.za

Pipes, Pumps and Valves Africa - Jan/Feb 2018

T: +27 (0) 11 842-8300 F: +27 (0) 11 827-8663 E: gareth.langton@klinger.co.za W: www.klinger.co.za

Viking Foundry (Pty) Ltd

Directors: W. Fourie (Chairman), N.P. Mnxasana (Non Exec) R Kruger, R. Dye, G.M. Scrutton Branch Manager: R. Dye Company Secretaries: Winhold Limited Reg No 1945/0196

T: +27 (0) 11 873-5093 F: +27 (0) 11 873-5695 E: sales@vfdy.co.za W: www.vikingfdy.co.za

KSB Etanorm 210x275.indd 1

2016/09/23 12:22 PM

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If it’s not Inval®, it’s not Invincible

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