Pumps and Valves Mar/Apr 2018

ENDORSED BY SAPMA , SAPSDA SAVAMA, AND VAMCOSA

MAR/APR 2018

Pipes, Pumps and Valves Africa - Mar/Apr 2018

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KSB Etanorm 210x275.indd 1

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Pipes, Pumps and Valves Africa - Mar/Apr 2018

2016/09/23 12:22 PM

CONTENT COVER STORY The prime function of a Rotary Valve

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ENDORSED BY SAPMA , SAPSDA SAVAMA, AND VAMCOSA

MAR/APR 2018

INDUSTRY NEWS Bauma report back

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Mining insights: Curbing protracted and violent strikes in 2018

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Overcoming dead legs with heat tracing at Jackal Creek Golf Estate

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CAMINEX 2018 to provide trade platform, latest product showcase

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AMD Rotolok

PUMPS With the ever-increasing use of variable speed drives for pump systems 12 Things to check when buying a pump

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Mines urged to dredge ponds before rains arrive in earnest

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LGH supplies Sp load cells for turbine pump project

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Driving fan and pump control in a range of niche sectors from HVAC to wine farms and mining

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Desalination is an integral part of future water-source mix for Cape Town

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Packaged pumping systems are gaining momentum in the industry

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VALVES Robust valves and actuation accessories for the mining industry

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Diaphragm operated control valve solutions

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Doubling valve lifespan

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eDart installs an automatic slurry feed splitter

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Tectra Automation boosts process industry with ex-stock OMAl ball alves

On the cover

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PIPES Closely-knit customer-supplier relationship pays dividends on a challenging pipe project

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Multi Alloys - casting a wider product footprint

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MARKET PLACE

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BUYERS GUIDE - PUMPS

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BUYERS GUIDE - VALVES

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Tel: +27 (0) 11 674-1166 Email: theo.sherman@amd-rotolok.co.za Web: www.rotolok.com

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 Email: info@pumpsandvalves.co.za Production: Jeanette Jordaan Sub-Editor: Debbie van Rensburg

Index to Advertisers

Ainsworth Engineering 13 Air & Vacuum Technologies 9, 24 AMD Rotolok OFC, OBC APE 35 Atlas Copco 31 BMG 33 Caminex 26 Chick Henderson 21 Golf Day IBC Invincible Valves 15 KEW Foundry 17 KSB IFC Lifting Placements 39 Sam Engineering 29 Stewarts & Lloyds 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 - Mar/Apr 2018

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The prime function of a Rotary Valve COVER STORY

Rotary Valve regulate the flow from one chamber to another while maintaining a good airlock condition. The product is mainly in dry powder or granular form.

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n the dust filtration field good airlocks are essential on cyclone and bag filter applications in order that the manufacturer’s quoted high dust collection efficiencies can be maintained. Airlocks are also important in the pneumatic conveying industry, where product is regulated into a high pressure conveying line while minimising air leakage.

With Rotolok there are no double standards, all our standard valves are precision machined for close tolerances and minimal eccentricities. Pressure differentials to 20psi and temperatures to 400°C. We have made specials to handle temperatures covering 1200°C and pressures to 350psi.

Rotolok Rotary Valves and Airlocks have ATEX Covered Following successful completion of the rigorous testing process Rotolok can offer a complete range of Rotary Valves certified as suitable for use as an explosion barrier to a maximum of 10bar and for explosion isolation for ST1 and ST2 dusts.

Standard Features • • • • • • • • •

Maximum number of blades in contact with body at one time without affecting throughput.

Good throat opening at valve entry allowing high pocket filling efficiency.

Minimum clearance at rotor tips and sides with body.

Robust body adequately stiffened to prevent distortion.

Heavy shaft diameters minimising deflection.

Outboard bearings for non-contamination.

Packing gland type seals.

Maximising valve speed to 25 rpm -prolonging life, ensuring good throughput.

Precision machining of components.

Specification

Bodies Cast Iron, Stainless Steel or Aluminium precision bored.

End Covers Cast Iron, Stainless Steel or Aluminium spigot located in body for concentricity.

Rotor Fabricated Mild or Stainless Steel.

Bearings Sealed-for-life ball type rigged outboard.

Shaft Seal Gland type with PTFE packing.

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Pipes, Pumps and Valves Africa - Mar/Apr 2018

Theo Sherman, Managing Director

Drive TEFC geared motor unit side wall mounted to valve body and complete with taper lock sprockets and chain drive all in an enclosed guard.

Options • • • • • • • • • • • •

Quick Release Rotors Direct Coupled Drives Air Purge Glands Body Vents Vent Boxes Dropout Boxes V.S. Drives Speed Switches Flameproof Motors Shear Plate Deflectors Electroless Nickel Plating Hard Chrome Internals etc.

Standard Rotors Rotolok basically manufactures four types of rotor as outlined, but to give the plant engineer flexibility many variations can be accommodated, e.g. closed/tipped, reduced volume, staggered blades etc. We will make a rotor to suit your application - not our production.

Valve Selection The chart below gives theoretical and estimated throughputs on the basis of rotor speed. The theoretical figure is determined by the swept volume of the valve and is calculated on a pocket fillage of 100%. In practice this is seldom achieved as density, product characteristics, pressure differential, feeding methods, all affect the

COVER STORY

Rotolok manufactures and casts other valve sizes with rectangular & other non-standard inlets.

valve throughput efficiency. On these considerations the estimated figures are assessed and are more acceptable for selecting the correct valve. e.g. Select a valve to handle 7 1/2 tonnes/hour of flour at 545kg/cu.metre. Volume required = 7.5 x 1000/545 = 13.75 cu.metre/hrs.

From the chart the 300 unit running at 14 RPM covers this requirement.

Factors other than throughput can sometimes determine valve selection. This is particularly true on cyclone and

filter applications where the valve inlet size to prevent bridging can become the governing factor, always with the proviso that the potential valve discharge rate exceeds the collecting rate.

Contact Theo Sherman, AMD Rotolok, Tel: +27 (0) 11 674-1166/7, Cell: +27 (0) 82 411-8658 theo.sherman@amd-rotolok.co.za, www.rotolok.co.za Pipes, Pumps and Valves Africa - Mar/Apr 2018

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Signs of industry recovery at bauma CONEXPO AFRICA amidst regional economic challenges 14167 visitors attended the trade fair The premier trade fair for construction machinery, building material machines, mining machines and construction vehicles in Africa has firmly established itself in the market following its third edition. 454 exhibitors from 34 countries and 14,167 visitors attended the international trade fair,“The trade fair reflected a sense of renewed optimism and highlighted the opportunities in the industry, despite recent economic challenges”, Stefan Rummel stated, Managing Director of Messe München. Petra Kaiser, Senior Director of International Exhibitions & Events at the Association of Equipment Manufacturers (AEM), added: “It is significant to have a consistent and engaged presence in the region in order to take advantage of long-term business potential. bauma CONEXPO AFRICA creates a platform to help facilitate these opportunities.”

Exhibitors experienced increased sales of machinery and equipment over the four days of the trade fair, as reported for example by Rajen Garender, Marketing Director, Weir Minerals: “bauma CONEXPO AFRICA is an extremely wellorganized and professional trade event. It has been a successful exhibition for Weir Minerals with several promising sales opportunities in the works.”

A highlight of the 2018 edition was the quality of visitors attending: “bauma CONEXPO AFRICA provided excellent networking opportunities for Shantui, providing us with good quality contacts.

A well-organized opportunity, however the number of visitors was lower than expected.

Due to our success at this edition, Shantui looks forward to exhibiting again in 2021”, said Naseera Barradeen, Marketing Manager, Ever Star Industries.

Bauma CONEXPO AFRICA featured exhibitors from across various industry segments that were pleased with the trade fair. “KAESER is very satisfied with the results of this exhibition”, said Marco Angermüller, Manager Product Support at KAESER KOMPRESSOREN. “The number of visitors was limited, but the quality was great for us. We could sign a lot of orders and found many new customers which will help KAESER to grow further in Africa, especially in South Africa.”

The organizers, BC Expo South Africa, Messe München and AEM are looking forward to the next edition of the trade fair, which will take place again in Johannesburg in 2021.

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Pipes, Pumps and Valves Africa - Mar/Apr 2018

Pipes, Pumps and Valves Africa - Mar/Apr 2018

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INDUSTRY NEWS

Mining insights: Curbing protracted and violent strikes in 2018

By Johan Olivier, Partner at Webber Wentzel

In one of its most recent surveys, the Chambers of Mines estimated that the mining industry was responsible for creating approximately 450,000 direct jobs in South Africa.

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he most recently published Fraser Institutes research also reported that South Africa had Labour Regulations/Employment Agreements and Labour Militancy/Work Disruptions which could act as a relatively high deterrent to investment. One of the key contributors to this figure is likely to be strike actions. In a time where unemployment rates are escalating, the need to ensure growth and stability of the mining industry, including its labour relations, has never been more acute.

Although the right to strike is a sign of a healthy democracy and serves to balance the power of employees and firms through collective bargaining, protracted and/or violent strikes are likely to be a disincentive to potential mining investors. Research published by the Mandela Initiative, suggests that although the frequency of strikes has decreased substantially in South Africa since 2000; it appears that when they do occur, they do more intensely. This trend has played itself out clearly in the mining industry.

In a bid to address this issue in the mining industry, the National Economic Development and Labour Council (NEDLAC) negotiations of 2016, resulted in the creation of the NEDLAC Accord on collective bargaining and industrial action (the Accord) as well as the Code of Good Practice: collective bargaining, industrial action and picketing.

The parties to the Accord are the Government (including State Institutions like the CCMA and Bargaining Councils), employers’ organisations and trade union federations and their members. In its broadest terms, these parties have undertaken to ensure that, should violence, intimidation or the threat of harm occur in strikes, they will do everything in their power to ensure that the strike is solved as promptly as possible. The Code details the practical application of the Accord. It will provide guidance on collective bargaining and dispute resolution among others. In terms of their effect, anyone interpreting the Labour Relations Act (LRA) must take the Code into account as well. As things currently stand, however, the trade union federation, SAFTU (of which NUMSA is a member) and the trade union AMCU have not signed the Accord. As such, the full benefit of the Accord and the Code at addressing violence and improving effectiveness of collective bargaining has not yet been felt.

This may, however, be addressed in part by the coming into force of the the Labour Relations Act Amendment Bill (Amendment Bill), published in November 2017 and likely to come into force in 2018. The Amendment Bill reflects

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Pipes, Pumps and Valves Africa - Mar/Apr 2018

Johan Olivier, Partner at Webber Wentzel

in part the agreement reached on the employer demands regarding the introduction of legislation to curb violence during the course of a strike. To the extent that these are passed into law, they will be binding on all employers and employees.

Two key ways which the Amendment Bill will curb violence during the course of a strike is through: •

First, the introduction of an advisory arbitration panel by the Director of the CCMA in prescribed circumstances.

An advisory panel will consist of a Senior Commissioner of the CCMA and two assessors, one appointed by the employer party and one by the trade union party. The arbitration can be conducted in a manner that the Chairperson deems appropriate in order to make an advisory award fairly and quickly. The panel must issue an award within 7 days of the arbitration hearing. If the Chairperson is unable to secure the agreement of both assessors the Chairperson must issue the award on behalf of the panel. The parties then have 7 days within which to indicate that they accept or reject this award. Should they accept the award the award will be binding and it could also be extended in terms of sections 23 or 32 of the LRA to non-union members and other parties. The parties are bound by the award and cannot then strike in terms of section 65(3) of the

by the Commissioner, the Labour Court can order the suspension of the picket. Any party to the agreement may also approach the Labour Court for an interdict if there is a breach of picketing rules.

Unfortunately, the amendments do not include specific provisions requiring a ballot before strike action is embarked upon as trade union opposition thwarted attempts to include these.

INDUSTRY NEWS

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LRA. A party who rejects the award must motivate the rejection and the Minister of Labour can then publish the award for public dissemination.

Second, amendments to picketing rules which envisage that employer and trade unions can enter into collective agreements regulating picketing which not only deal with a particular dispute but will have a more general application in the sense that it can apply to all future strikes and lockouts. Conciliating Commissioners at the CCMA will also be able to address the issue of picketing rules during the course of a conciliation process. The conciliator will not only seek to conciliate the dispute that gives rise to the strike but also to secure an agreement between the parties on the rules that will apply to any picket. If the parties cannot agree in a general collective agreement on the picketing rules, the conciliating Commissioner may determine the picketing rules him/herself referring to the Code which provides for default picketing rules.

The amendments also provide that no picket may take place unless picketing rules have been agreed to in a collective agreement or the picketing rules have been determined by the Commissioner. Should any party breach the collective agreement or rules established

Although there are a number of problems with the way in which the amendments have been drafted, they should nonetheless be welcomed by employers as a positive step towards curbing lengthy and drawn out strikes which may lead to violence. From the employer's perspective, they should now seek advice on incorporating the provisions of the Accord and the Code as well as the amendments to the LRA in their recognition agreements. The training of negotiators sufficiently skilled to avoid drawn out strikes and disputes should also be supported. Employers should also look at more creative ways to settle wage disputes before they turn into strikes.

The real sweetener to this positive development would be if we could all work together to get all trade unions to sign the Accord and support the Amendment Bill and the Code.

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Pipes, Pumps and Valves Africa - Mar/Apr 2018

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INDUSTRY NEWS

Overcoming dead legs with heat tracing at Jackal Creek Golf Estate Leading property development group, Montague Properties partnered with heat tracing specialists eltherm South Africa to overcome temperature maintenance challenges in its water reticulation systems at Jackal Creek Golf Estate in Roodepoort, Johannesburg, Gauteng.

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he golf estate’s reticulation system had been experiencing difficulties with hot water - residents were complaining that large volumes of water were wasted before it would reach the right temperature. Following an investigation, eltherm South Africa found that this was due to “dead legs”; water sat in the pipes and cooled during the night or day.

plumbing system) at 60 degrees Celsius thereby overcoming any possible dead legs and ensuring the property group meet the requirements of the SANS 10400 XA 10204 building code while also saving on energy and water costs.”

The EHT solution at Jackal Creek Golf Estate was installed in under four weeks. The insulation involved fastening the electrical heat tracing onto the outside of the plumbing pipe lines and then insulating it with preformed over-the-counter insulation.

To overcome this challenge, Montague Properties partnered with eltherm for the design and installation of an electrical heat tracing (EHT) solution that would mitigate the dead legs in the reticulation system. This was done by maintaining the water temperature coming from the boiler.

The system also allowed the developer to comply with building code SANS 10400 XA 10204 which stipulates that no more than four litres of water can be wasted before hot water reaches 60 degrees Celsius.

Explains Giles Maynard, General Manager at eltherm South Africa:

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Jackal Creek Golf Estate now benefits from a system that ensures temperature is maintained and no unnecessary water or energy is wasted.

Maynard Giles

“Montague Properties was looking for a solution that could be installed quickly and offer an alternative to a costly closed loop reticulation system.”

“We proposed a self-regulating EHT system that would maintain the temperature of the hot water (in its

Pipes, Pumps and Valves Africa - Mar/Apr 2018

An EHT system offers the following benefits to the plumbing and property development industries: •

Meets environmental requirements for greener building designs; • Metallic and non-metallic pipes can be heat traced; • Simple and quick to install; • Significant water and energy savings; • Lower maintenance cost as the heat tracing is very reliable and can be quickly repaired in the event of a failure; and • Drives down overall operating costs (OPEX).

Contact Sasha Endermann, eltherm South Africa, Tel +27 (0) 82 805-6302, sasha@liquidletters.co.za, www.eltherm.co.za

Economists expect the Zambian economy to grow at a faster pace in 2018 due to higher investment inflows and strong agricultural and mining output (Zambia Economic Growth, FocusEconomics, Jan 2018) and this growth is expected to continue in 2019.

The Zambian mining industry is also expected to expand steadily over the next eight years as the prices of key minerals trend higher and the regulatory environment remains favourable. This is according to latest research from the Fitch-affiliated research organisation BMI Research (Zambia Mining Report, 01 Jan 2018). Research points to mining activity and investment increasing, although potentially hindered by the ongoing problem of power shortages.

CAMINEX, Zambia’s premier Copperbelt agricultural, mining and industrial trade expo, will be back in June to showcase the latest in products, machinery, technologies and services that these and related industries can offer. An important trade platform, CAMINEX is supported by government and industry associations.

It attracts thousands of industry professionals keen to come together in one location to conduct business, to network with peers and grow business relationships, and to find out about latest industry trends.

Taking place at the Kitwe Showgrounds in Kitwe, Zambia, from 5-7 June, the event is expected to attract over 4,500 visitors and host over 100 local and international exhibitors.

CAMINEX 2018 will bring these industries together through an industry hub where business transactions can take place and where valuable stakeholder partnerships can develop.

Visitors will have the opportunity to network with industry professionals, get advice from technical experts, view machinery demonstrations and benefit from the knowledge and skills shared at the daily free-to-attend business seminars.

Feedback from exhibitors at CAMINEX 2017 was positive and they cited increased brand awareness, generation of sales leads and acquiring new customers as top amongst their key successes gained at the show.

Last year’s show enjoyed strong support from government and industry associations with endorsements from the Ministry of Mines and Minerals Development; the Ministry of Commerce, Trade and Industry; the Ministry

INDUSTRY NEWS

CAMINEX 2018 to provide trade platform, latest product showcase

of Agriculture; the Ministry of Fisheries and Livestock; the Zambia Chamber of Mines; the Kitwe District Chamber of Commerce and Industry; SAIMM Zambia; the Department of Trade and Industry South Africa and the South African Capital Equipment Export Council.

Chairman of CACSS, London Mwafulilwa, says he was delighted that so many government Ministers were at the event in 2017 as it is “an endorsement of what the show means to the Copperbelt and to business in the region.”

He looks forward to continued government and industry support at CAMINEX 2018.

“CAMINEX is the essential trade platform for the Copperbelt region,” says Gary Corin, Managing Director of Specialised Exhibitions Montgomery, joint organisers of the event. “It creates an engaging space for stakeholders to network and conduct business.”

For further information on CAMINEX 2018 and visitor online registration, visit the website www.caminex.co.zm Contact Karen O’Neil, Copperbelt Agricultural, Mining and Commercial Show Society (CACSS), Tel: +260-212 238011/238012 Cell: +260 966 783 075, karen.oneil@cacss.co.zm Pipes, Pumps and Valves Africa - Mar/Apr 2018

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PUMPS

With the ever-increasing use of variable speed drives for pump systems With the ever-increasing use of variable speed drives for pump systems, the question of what specifically an inverter duty motor is, seems to remain unclear to many. Reece Robinson, senior technical trainer for the Grundfos Technical Institute, attempted to bring some clarity on the subject during a recent international webinar.

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ith technological improvements to variable frequency drives and the motor manufacturers’ realisation that most motors will be controlled by them, more often than not, questions are being posed whether an inverter duty motor is even necessary these days.

With the term “inverter duty” not appearing anywhere, not one single time, in the standards for motors by the National Electrical Manufacturers Association (NEMA), the organisation tasked with defining the standards used in North America for various grades of electrical enclosures typically used in industrial applications, one can easily surmise that the term “inverter duty” is not all that well defined, says Reece.

Introduced to withstand the higher voltage spikes produced by variable frequency drives (VFDs) and able to run at very low speeds without overheating these motors are associated with increased performance.

But, warns Reece, this does come with an increased cost.

“The question that one has to answer is if the motor with the word “inverter” on the nameplate is worth the added cost,” he says.

There is, however, no one single answer to that question, but he does advise that one gets a clear understanding of the efficiency of one’s pumps to do so.

He says when guiding engineers towards specifying the correct motor to match their pumping requirements, it is critical that they understand centrifugal pump control and the resulting pump speeds and how torque is affected by this speed.

“Know the speed and the torque of a drive and you will have a very good idea of its efficiency,” he says ultimately giving one insight into the need for an investment into an inverter duty motor or not.

Pump control and speed According to Reece when selecting pumps for variable flow it is important to make a selection based on a design flow that is to the right of the pumps best efficiency point.

“For most centrifugal pumps running on drives the rule of thumb is 95% VFD efficiency. Sometimes the drive will run at low speed, lower torque or higher speed, higher torque, it 12

Pipes, Pumps and Valves Africa - Mar/Apr 2018

depends on the duty cycle, but if you are trying to estimate the energy savings using the drive then using 95% VFD efficiency is a good guide.”

PUMPS

He says a lot of questions are often asked about turndown ratio.

“When I am doing training a lot of people ask what is the turndown ratio – how slow can I go on the pump or the motor. The reason it comes up is because of cooling.

If you look at a typical motor it is connected to the shaft-mounted cooling fan, so whatever speed the motor is turning, the fan is turning at the same speed,” he says. “There is a lot of concern about how well a motor is then able to cool itself.”

But, says Reece, cooling has to include a look at torque. “What is the horsepower of that motor, how much is the torque. That is the guideline in terms of cooling more than anything else.”

Using a pump curve example with the design head at 180 gallons per minute at 235 feet of head at 15 horse power 15 with a full load speed of 3450 revolutions per minute (RPM), the torque would be 22,8 foot pounds.

Turning this pump down to half its speed would take one to 45 gallons per minute at 14.7 feet, with 0,23 horse power and 863 RPM. “The big one, however, to take note of is the torque at only 1.4 foot pound,” says Reece. “This is a four to one speed ratio. What we take from this is that we don’t need a lot of cooling when the torque of this motor is only 1.4 foot pound from a base torque of nearly 23 foot pound.”

Using the same example, he showed that if one reduced 45 gallons of water per minute but remained at 235 feet then the speed would only be reduced by around 20%, the torque would have been reduced by 60%. “You still don’t have to be worried about cooling as one is only at 40% of the torque at that point. The same is true when one looks at speed and torque reduction with proportional pressure control.”

According to Reece a useful equation to remember for torque is that it equals the horse power times 5250 divided by the rotational speed.

“So, if you take your pump down to 25%, reduce the speed by 75%, the torque has been reduced by 93.9% and then we are only at 6% of our full load torque. This paints a picture that we do not really have to be concerned about cooling because this is a characteristic of a variable torque device, which is the whole family of centrifugal pumps.”

He says it is also important to look at what happens to torque when one has a constant pressure pump.

Pipes, Pumps and Valves Africa - Mar/Apr 2018

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Things to check when buying a pump PUMPS

Anyone who buys dewatering pumps should not just focus on the pumping quantity and delivery head. The ability of a pump to withstand the loads it is subjected to primarily depends on its design and components – and these are hidden inside the pump. What are the things to look out for?

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Unfortunately, it is very difficult for many users to recognise the quality of an aggregate simply by looking at it,” says Stefan Himmelsbach. A fact known and exploited by dubious manufacturers true to the motto ‘Darkness favours secrets’. The engineering expert at Düsseldorf-based Tsurumi, the market leader in the construction pump industry, presents a brazen forgery from the Far East: Even experts cannot tell the difference from the original at first glance.

This market leading manufacturer has taken legal steps against product pirates to prevent copies even entering the market, but things get more difficult when the pumps have their own brand character. “The price is often an indication that they might not deliver what they promise.”

No approval without a CE seal Himmelsbach recommends taking a close look at the name plate first. “All pumps marketed in the EU must have a name plate”. It states information about the following five points as a minimum requirement: manufacturer, machine designation, type, if necessary with serial number, year of construction and CE seal. “Lots of discounters from abroad are not aware of these requirements”.

Providing wrong information is not a small blunder; if there is no CE logo, the pump is simply not approved. And this casts a shadow on the reliability of other data, e.g. the electrical output. “Some buyers are not aware that they will be liable in the event of an accident.”

The electrics are of course a neuralgic point: starting with the cables. “We and other reputed manufacturers use cables that have been certified by the VDE and are safe”, emphasises Himmelsbach. Often looking at the identification on the cable sheath will offer clarity. He makes reference to the Association’s website that lists faulty components and their manufacturers: “This list names the black sheep in the industry”.

Copied components installed Tsurumi takes numerous steps to secure its products down to the finest detail. Using approved components is a mandatory requirement. One example that demonstrates how the company goes beyond its normal duty of care are the individually moulded electrical cables in the cable opening: Electrical damage, such as short circuits caused by damp, can be completely ruled out thanks to this hermetic seal.

Most top manufacturers, although not all, also opt for quality products even for ‘hidden’ components, according 14

Pipes, Pumps and Valves Africa - Mar/Apr 2018

to Himmelsbach. For instance, in the case of slide ring seals on the pump shaft that are absolutely vital for function, Tsurumi purchases double interior versions from the leading manufacturer of these parts.

It is no surprise that “We have found 1:1 copies of these seals in cheap pumps,” says Himmelsbach. “They look very similar; however they are made of inferior materials.”

Machine builders from other sectors are also familiar with the problem of the so-called ‘bogus parts’. “The inherent risks are enormous.”

Reputed brands offer safety Some components represent the domains of the respective manufacturers. Amongst other things, at Tsurumi this includes the in-house developed oil lifter that has been registered for patent which lubricates the pump to the optimum in every position. This key technology has certainly helped to ensure that Tsurumi has become the world’s leading manufacturer of contract pumps.

Himmelsbach’s advice: “Users should only buy products from specialists after extensive consultation.” There are also secondary factors that are very important, like the scope of the delivery program (at Tsurumi 800 pump types), repairfriendliness (modular design) and the service network (250 distributors in Germany alone). He concludes: “If reliability, accident protection and service are important, always opt for a reputed supplier of brands”.

Contact Tsurumi Pumps, Tel: +27 (0) 11 876-5362, sales@tsurumipumps.co.za, www.tsurumipumps.co.za

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

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

South Africa has an abundance of mineral resources which plays a huge role in the local and global economy.

Globally we see a mining crisis, which has affected mining regions around the world, but in particular South Africa’s mining sector. Not only are we faced with the global pressures of commodity prices and currency fluctuation, but in South Africa we face additional factors that contribute to the crisis. These would include volatile labour relations, tough government interventions as well as regulatory uncertainty.

The impact of Eskom’s load-shedding and rising power costs has an additional adverse effect.

Due to many of these factors a number of Mining Companies have been forced to reduce overheads and head office costs, which has resulted in job losses throughout and a rather light operational level staff compliments. Banks in South Africa have been forced to re-assess and track their exposure and proactively manage these, therefore less lending and higher interest rates add to the crisis. With commodity prices having declined significantly over the past months which in turn means fewer are able to meet the risk management requirements.

With all that said we should be mindful of the fact that we do indeed have a rich mineral resource country with many opportunities for profitable, successful and sustainable mining in South Africa.

If it's not INVAL®, it's not Invincible

Pipes, Pumps and Valves Africa - Mar/Apr 2018

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PUMPS

Mines urged to dredge ponds before rains arrive in earnest With the rainy season approaching in most of South Africa’s mining regions, monitoring the capacity of process water return ponds becomes increasingly critical – to monitor whether silt build-up is jeopardising the dams’ functioning.

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Managing the water balance on mines is becoming more demanding as mines work to become more self-sufficient, and to draw less water from municipal sources,” says Lee Vine, managing director at dredging and dewatering specialist, Integrated Pump Rental. “Process water ponds therefore need to be carefully monitored and regularly dredged to prevent too much sediment from accumulating.”

More sediment means less water storage capacity, which can affect the efficient running of the process plant as well as create a potential environmental hazard if heavy rainfall leads to tailings over-topping the pond. Exacerbating the risk of insufficient water storage capacity is the widely held opinion that rainfall is becoming increasingly variable as a result of climate change factors.

“In many areas, this means that summer rains will include a higher number of heavy downpours within relatively short periods of time. And this will place an increased load on these ponds to contain more water than usual,” says Vine.

“It is therefore vital that they are operating optimally, and do not have their capacity constrained by excess silt.”

He highlighted the environmental risk of tailings spilling out of ponds, and perhaps even out the boundaries of the

mining lease area – an eventuality that mines work hard to avoid due to the stringent legal requirements.

“The regular desilting of return water ponds and dams is becoming more and more important, as we begin to appreciation the proper value of water on our planet, and especially in relatively dry countries like South Africa,” he says. “Not only must mines ensure there is enough capacity to receive and retain excess water during the rainy season, but there is also the need to store as much as possible for the dry season.”

He argues that purchasing treated municipal water to ‘top up’ their requirements is becoming less of an option for mines due to the rising cost of water and the growing competition for water among stakeholders like communities, industry and agriculture.

Applying a regular dredging programme need not be onerous, he adds, and can readily avoid a situation where silt or slimes threatens the water retention and water holding capacity of ponds and dams. Integrated Pump Rental has locally designed, engineered and manufactured the SlurrySucker dredge unit for precisely this purpose, and offers the technology on a rental or turnkey contract basis for mine pond maintenance.

The regular desilting of return water ponds and dams is becoming more and more important.

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Pipes, Pumps and Valves Africa - Mar/Apr 2018

Process water ponds therefore need to be carefully monitored and regularly dredged to prevent too much sediment from accumulating.

The SlurrySucker’s design ensures that there is no danger to the high density polyethylene (HDPE) lining of the ponds, as the agitation of the sediment is conducted using only water jets. Recent modifications to the original model even allow for the system to suck up large solid objects, such as gloves, boots, plastic packets and hessian bags, without blocking up and slowing down operations.

Using the high quality Grindex brand of slurry pumps and a purpose-engineered dredge head, the units are capable of extracting high tonnages; 240 m3 per hour of slurry/water mixture in the case of the smaller SlurrySucker Mini (30 to 40 dry tons per hour) and double this using the SlurrySucker Maxi, which will remove 70 to 80 dry tons per hour.

“The benefits of being proactive about maintaining return water ponds cannot be overstated, but we realise that mines have many competing priorities to manage and this aspect of their operations is sometimes overlooked,” concludes Vine. “For this reason, we even offer a service where our technical team will schedule regular visits to the relevant water storage or treatment facilities to check what needs to be done, and when. We will then conduct the dredging as and when necessary, significantly reducing the operational and environmental risk to the customer.”

Vine suggests that in many operations the retreatment of sediment may even pose an economic opportunity that would more than cover the costs of the dredging.

“We are able to assist the mine in designing arrangements that would allow the pond sediment, which is usually enriched to some extent with the ore being mined, to be pumped back to the process plant for retreatment,” he says.

PUMPS

“There are even conditions under which a mine may find it worthwhile to procure their own SlurrySucker, for permanent and ongoing use on desilting operations,” says Vine. “The equipment can be moved easily by road trailer and commissioned within a day. The operation of the equipment can be conducted by just one person, and we provide all the necessary training, support and maintenance required.”

Contact Lee Vine, Integrated Pump Rental, Tel: +27 (0) 72 627-6350, lee@pumprental.co.za, www.pumprental.co.za

Cast with Skill – Delivered with Speed KEW Foundries taps into 100 years of Foundry and Pattern Shop experience to develop innovative solutions to unique casting requirements.

We work closely with our Clients in the design and development of a diverse range of patterns to produce small to large castings servicing the pumps, valves and water reticulation industries.

KEW is an ISO 9001 listed company.

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

©Creamer Media 090916CG

• Specialists in various grades of Grey and SG Iron • Sophisticated castings up to 10 500kg • Mass weights and simple castings up to 11 000kg • Non-Destructive Testing performed on Site

Pipes, Pumps and Valves Africa - Mar/Apr 2018

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PUMPS

LGH supplies SP load Cells for turbine pump project

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Construction company, Pace Contracting recently completed removal and installation of three vertical turbine pumps, used in emergency flooding situations in downtown Louisville, Kentucky. Integral to the project were four 50-ton capacity Straightpoint (SP) wireless compression load cells supplied by Lifting Gear Hire (LGH).

P

ace accepted a scope of work from the Metropolitan St. Louis Sewer District (MSD), which partners with 59 municipalities (co-permittees) to comply with storm-water permit requirements for the St. Louis Metropolitan Small Municipal Separate Storm Sewer System. MSD charged Pace with jacking and remounting new replacement flood pumps, having removed the old units.

in the building above the pumps. The pump columns, were designed to be installed in five sections, with a total weight of 12 859 kg which exceeded the capacity of the 12-ton crane.

LGH provided from its hire fleet the load cells along with SP software (SW-MWLC) and a rugged tablet. Pace also utilized a 10-ton capacity air hoist from LGH and a 12-ton hoist on a gantry crane that was permanently installed

Michael Bryant, project manager at Pace Contracting, said: “[Therefore], we had to utilize the hydraulic rams on the bottom of the pump to support the weight of four sections while the crane installed the fifth and final section on the main floor. Once that piece was installed, the lower four sections were raised up, using the hydraulic rams, so the pump could be bolted together. The load cells were very useful because they helped us keep the center

Four 50-ton capacity SP wireless compression load cells were supplied by LGH.

The pump columns were designed to be installed in five sections, with a total weight of 28,350 lbs.

Pipes, Pumps and Valves Africa - Mar/Apr 2018

Load cell readings were taken on a rugged tablet.

jacking process was lost once the pump assemblies were in place.

PUMPS

Pace utilized hydraulic rams on the bottom of the pump to support the weight of four sections while the crane installed the fifth and final section on the main floor.

The offset center of gravity on the 1-meter diameter structures was due to a discharge elbow midway up the suction tube assembly. As explained, the solution was to employ the load cells atop four LGH hydraulic rams, which sat on timber blocks, to weigh the 11-meter suction tube and pump as it was assembled.

“We used the tare weight mode and set the weight sensitivity scale down to 9 kg per jack point; we also programmed the alarm mode for additional safety,” Tobin said.

Pace safely jacked the last part of the entire assembly by using SP’s 2D center of gravity function to align the flange holes to the roof studs, despite only 13 cm of tolerance. Tobin said he was familiar with the concept following consultation with Wayne Wille, technical sales manager at SP, who introduced him to the ability of the product to display live, clear readings, featuring 2D center of gravity, on a handheld device.

He added: “I immediately saw the potential for new and existing LGH rental customers and this application served as a case study that we’ll use to further demonstrate that capability.”

Both operator and crew were safely out of harm’s way to complete all three jacking jobs. “The complete solution was covered by a three-week rental and saved over a week in additional labor costs,” Tobin said.

Temporary lighting was required to work in the underground location.

of gravity for the lower section of the pump centered, preventing it from tipping over.”

Dan Tobin, heavy rigging and lifting OSR at LGH, explained that two major complications on the project were caused by this offset center of gravity and the fact that the physical line of sight for the last 30 cm to 46 cm of the

Bryant concluded: “We were satisfied with the solution presented by LGH; the SP equipment was easy to use and truly plug-and-play. We were grateful for the technology and expertise, given inherent complications with working around the two-story building in a downtown environment, whilst working 15-meters below ground level.”

Contact David Ayling, Director of Straightpoint: dayling@straightpoint.com, www.straightpoint.com Pipes, Pumps and Valves Africa - Mar/Apr 2018

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PUMPS

Driving fan and pump control in a range of niche sectors from HVAC to wine farms and mining From wine farms to the mining industry, the new LTP-B Eco drive from SEWEURODRIVE is finding application in a range of sectors. The purpose-built drive is distinguished by the fact that different parameters can be set for a range of functions, from fan to pump control.

W

hile SEW-EURODRIVE does have general-purpose units for fans, pumps, and even conveyors, it initially saw a niche for a unit specifically for the Heating, Ventilation and Air-Conditioning (HVAC) industry, targeted at building designers focusing on ‘green’ design, National Sales Manager Norman Maleka comments.

In terms of a commercial building such as a hospital, traditional drives meant that fans had to operate continually at full speed. “With the improved functionality of the LTP-B Eco HVAC drive, facilities managers can now control a fan by only running it according to demand, for example.

This represents a major advantage in terms of energy-saving, as it allows for total flow control,” Maleka highlights.

The HVAC sector remains a focus, especially in the key building-design market of Cape Town, the broader energy-saving benefits means it is equally applicable to customers in other niche sectors, especially as the drive is available in a broad poweroutput range from 0.75 kW to 250 kW. In addition, it replaces the traditional electrolytic capacitors used in the DC link with film capacitors, which have reduced energy losses, as well as eliminating the need for AC, DC or swinging chokes, which boosts the overall efficiency of the drive by 4% compared with a standard AC drive.

Maleka reveals that SEW-EURODRIVE was recently approached by a Nelspruit customer for a 160 kW unit.

“We are hoping to be able to use this

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Pipes, Pumps and Valves Africa - Mar/Apr 2018

In terms of fan-and-pump control for mining applications, the LTP-B Eco drive is ideal to ensure clean airflow underground. HVAC control in mining operations is also highly energy-intensive, which means the new energy-efficient drive can make a significant contribution to total cost-savings.

PUMPS

Another benefit for mining operations in terms of enhanced health-and-safety is the drive’s fire mode, which allows for fans to run for as long as possible in the event of a fire, maximising smoke extraction and boosting evacuation time. In addition, the belt-break detection feature raises an alarm in the event of the belt slipping or any related fault occurring, in order to ensure continuous operation.

Extra features include pump-cleaning and pump agitation functions, which is particularly useful if a pump has been out of operation for a period of time and needs to be restarted.

The sleep mode function allows for added energy-saving when the drive is inactive.

as a case study, as the more real-time application data we can obtain, the more we can promote the new drive.”

To date, SEW-EURODRIVE Cape Town has carried out small-scale projects relating to pumping applications for wine farms, which require mobile pumping stations. “Our customer focus on fan-and-pump applications

convinced us that we needed a dedicated HVAC drive.

“Even though we can use a multipurpose drive unit, there are some limits in terms of functionality. It is always best to have a dedicated product for specific sectors, as our customers prefer customised to generic products for various applications,” Maleka notes.

“All of these functions can be monitored directly from the drive itself, as all inputs can be fed back directly to the management system, with no direct interface required,” Maleka adds. With two LTP-B Eco drives already sold to customers in Africa, he concludes that the growth opportunities for the new product remain robust, both locally and on the rest of the continent.

Contact SEW Eurodrive Tel: +27 (0) 11 248-7000 www.sew-eurodrive.co.za

Pipes, Pumps and Valves Africa - Mar/Apr 2018

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PUMPS

Desalination is an integral part of future water-source mix for Cape Town Desalination must form part of the future water-source mix in a large coastal city in a water-scarce environment like Cape Town. However, it must be carried out responsibly from an environmental and financial perspective.

T

he impact of higher water tariffs to fund water augmentation schemes will be long-lasting, and may be a future burden for ratepayers, especially when the drought is past, Hatch’s Pieter de Kock cautions.

Desalination of seawater is carried out by means of reverse osmosis (RO). This is a process whereby salt water is passed through a very dense membrane to strip the water molecule of salts and other minerals, leaving demineralised water that is further treated before it is fit for human consumption. “It is expensive to carry out reverse osmosis on a large scale, and very energy-hungry due to the high pressures required,� de Kock notes.

There are also significant challenges to transport millions of litres of treated water from the coast to the main reservoirs to distribute via the existing distribution network and new large diameter pipelines and pump stations will be required. The relative unit cost per kilolitre of water produced could be up to three times more expensive than surface water depending on the relative location and cost of connecting infrastructure.

The impact of brine discharge on the environment and

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Pipes, Pumps and Valves Africa - Mar/Apr 2018

coastal areas must also be taken into account, and detail coastal modelling studies are required.

The City of Cape Town is currently investigating largescale desalination for Cape Town. It is constructing a number of smaller-scale desalination plants, which is anticipated to deliver the first two million litres of an expected seven million a day by March 2018.

Hatch is managing a R60 million emergency water augmentation project for the Stellenbosch Municipality in the Western Cape, which includes the implementation of fifteen to twenty new boreholes, and at least eight new containerised borehole water treatment plants to assist in mitigating the effects of Day Zero for the Municipality. This will make Stellenbosch Municipality largely independent from the City of Cape Town for its potable water requirements.

Contact Hatch, Tel: +27 (0) 11 239-5300, www.hatch.com

Packaged pumping systems are gaining momentum in the industry W

hen it comes to choosing a pump, it is not as simple as just choosing a brand and technology.

Long before an order for a new pump is placed there are several factors that have to be considered such as the operational requirements, the application details, model and experiences.

With so many styles, brands and makes of pumps available, selection of the right technology can be difficult. Not to mention that when the pump arrives it has to be installed.

This can be just as longwinded a process requiring a variety of people from construction workers to engineers. In many cases electrical and mechanical experts are required (as well as an engineer) to provide the optimal layout for the pump. Problems sometimes occur because someone on the team does not know or understand key requirements and auxiliaries’ necessary for a successful installation and optimal performance.

several people around the installation one only has to speak to the manufacturer that understands the best layout, auxiliaries and safety devices to ensure the best result for the pump.

The term “packaged” simply means that all the components needed for the pump system are pre-engineers and the pump is then mounted on a base.

PUMPS

They offer improved safety, compact layout, factory-tested systems and sole source responsibility for the system if problems arise. During a recent webinar Todd Loudin, president of North American operations and vice president of global sales for Flowrox, shared his insights on these systems.

“The system can be equipped with many auxiliaries and recommended safety and operational devices,” says Loudin.

“These packaged pump systems are delivered to site and have already passed a factory acceptance test (FAT). For the most part, the packaged pump systems are plug and play – connect piping and electricity and start pumping.”

According to Loudin these piping arrangements meet the needs of demanding flow control applications in variety of industries.

“They are an answer to the industry’s demand for faster, simpler and safer installations,” he says. “They guarantee accurate and repeatable flow while reducing maintenance time and cost.”

A different approach

Safety matters

The popularity of packaged pumps is increasing as it offers a new approach to not only the decision of what pumps to purchase but also the installation. Instead of having to access

Onsite and operational safety is increased through integrated containment optimal e.g. for aggressive chemical applications.

Pipes, Pumps and Valves Africa - Mar/Apr 2018

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“These systems offer real safety. If one takes applications where there is build up around the pump and various chemicals are mixed one could run into real problems. Not to mention that depending where one’s facilities are clean up can be timely or lead up to recommissioning procedures,” he explains. “With a small integrated system, a containment area is created and the chemical being pumped by a particular pump is literally caught in one spot.”

PUMPS

Loudin says often the containment for chemical feed systems are left to drain into raised concrete containment areas for the chemical building, which leads to operator safety concerns.

“Depending on the facility there may be extensive protocols for restarting the feed system or the whole building – this leads to longer downtime. An integrated system, isolates the leak to a single chemical and allows for operators to work in the same area with minimal concern for exposure.”

Other safety benefits include that all accessories are pre-piped and pumps are tested for leakage while safety shut off valves and pressure relief valves are tested to insure worthiness.

“The pump base can be equipped with safety drain valves so that in the event of a spill into the containment basin, the pumped medium can be removed safely. The pump drain can also be equipped with a safety drain alarm.”

He says the pumps are also equipped with hose and tube leak detectors that will signal to turn the pump should the tube or hose break.

Real benefits There are several reasons why a packaged pump system makes sense, says Loudin, the most obvious being the move from using a variety of contractors to a plug and play system.

“This also means that once the system is installed and functional and you have a problem you contact one entity to help with the issue at hand,” he says.

Also, contractors and users may not know exactly what is best for every pump and in fact may install auxiliaries that are great for one style of pump but exactly detrimental to another style of pump.

“Such as backpressure creating devices that are ideal for diaphragm pumps but reduce hose and tube life dramatically

in peristaltic pumps,” says Loudin. “When there is an issue for the customer they contact one company rather than the mechanical contractor, electrical contractor and the pump manufacturer to decide who is at fault. System integrators again, may do a fantastic job of installing a box of components on site and getting it up and running, but they are not continuing partners. Packaged pump system and pump manufacturers are there to support the pump for the life of the pump.”

The smart engineering designs of these pumps also produce impressive savings.

“It saves the customer time and total install price while better pump performance is a reality. At the same time, packaged pump systems provide a total solution and not just a pump.”

Pompetravaini, a market leader in the manufacture of Liquid Ring Vacuum Pumps – A&VT are the Sole Agents for Southern Africa.

SALES, SPARES AND REPAIRS

info@vactech.co.za

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Pipes, Pumps and Valves Africa - Mar/Apr 2018

0861 VACTEC (822 832)

www.vactech.co.za

Robust valves and actuation accessories for the mining industry

H

ere valves and accessories often suffer environmental attack and can perish as a result. AR Controls provides pneumatic enclosures in various materials to house and protect valve instrumentation, and to ensure that valves installed in hard-to-reach areas can be operated with ease from an accessible and clearlymarked remote area.

VALVES

The range of valves and actuation accessories from AR Controls of Vanderbijlpark is very robust and extremely well-suited for typically harsh mining environments.

AR Controls stocks ball, butterfly, knife gate, and check valves, as well as a range of actuators and actuation accessories. It also supplies a range of gate, globe, and air valves. Common materials of construction include carbon steel, ductile iron, 316 stainless steel, 2205 duplex stainless steel, 17-4 stainless steel, CD4MCuN stainless steel, and various super alloys.

“Mining customers can rest assured that AR Controls has a valve in the correct material and of the correct design for even the most challenging corrosive or abrasive applications,” Director Julien van Niekerk explains. “We deliver premium valve and engineered products, with an unrivalled level of service and support that increases productivity and reduces the total cost of ownership.”

He adds: “Our reputation for engineering excellence is earned through our commitment to invest in skills, development, and sharing knowledge and experience in order to inspire innovation. With a range of premium trusted brands and strong local manufacturing capabilities, we help our customers address their main issues of longevity, productivity, and efficiency of their operations. Superiority of design and robust research and development underpin the strength of AR Controls in the mining industry.”

The company’s strength lies in the high quality of its valve designs, and the use of high-quality corrosionand abrasion-resistant materials. Premium brands such as DeZURIK and ARVALV™ have become a standard on a number of mines, and have also been introduced to mineral industries beyond South Africa’s borders, with resounding success.

“We are expanding and improving our range of valves constantly with the latest materials, product design, engineering, and manufacturing technologies to ensure minimal downtime and reduced risk of disruption during operation,” van Niekerk stresses.

For over the last 20 years, AR Controls has manufactured its in-house ARVALV™ ported knife gate valve, which has become a standard in various sectors in the mining industry. “In order to add value to our supply chain, it imports the full range of DeZURIK premium valve products exclusively, which is a market leader in various industries such as mining and pulp and paper.

AR Controls also owns IncoValve & Controls, a brandnew range of butterfly and ball valves and actuators.

This combination of locally-manufactured products and premium imports places AR Controls in a unique position to service the mining industry. “Local manufacture affords us the opportunity to perfect our processes and technology, improve quality, monitor control costs, and even discover new applications.

Pipes, Pumps and Valves Africa - Mar/Apr 2018

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“Using third-party solutions to manufacture all of our innovations can diminish these opportunities. Taking the decision to remain primarily in-house focuses on longevity and maximises the long-term value that we offer to our customers. The biggest advantage in keeping our production in-house is the continuous product improvement it offers.

VALVES

“This makes it possible for our manufacturing team to send feedback to the research and development team during each step of the development and production cycle, which allows us to see what works and what doesn’t in a timeefficient manner. Having such feedback available immediately allows us to make improvements in product design, raw materials, process optimisations, and even packaging and delivery,” van Niekerk elaborates.

Although market conditions are challenging, with a decline in demand for certain minerals such as platinum, and an overall slump in commodity prices, there are signs that the general state of the market is improving, van Niekerk notes.

“It has also forced many mining houses and mining operations to rethink their long-term strategy, and enforce a robust cost exercise to overcome the various challenges that the mining industry is facing globally. We see that overall the mining industry is picking up slowly, and that new investments are being directed at certain sectors.”

Van Niekerk concludes that AR Controls has managed to keep pace with its customer demands, which has enabled it to grow in spite of the challenging market conditions. “Various departments within AR Controls have managed to reduce their overheads and improve their efficiencies. That is one of the main reasons we have managed to grow our footprint in the mining industry over the last 12 months.”

Contact AR Controls, Tel: +27 (0) 16 981-4551 sales@arcontrols.com, www.arcontrols.com

2018

CAMINEX

Copperbelt • Agricultural • Mining Industrial • Networking • Enterprise

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Pipes, Pumps and Valves Africa - Mar/Apr 2018

Diaphragm operated control valve solutions Pressure Relief Valves

The selection and sizing of pressure relief valves are very important. Generally, a pressure relief valve should be sized for one quarter (25%) of forward flow. This guideline requires a detailed analysis by a transient specialist who looks at all factors before making a final, informed selection. The pressure relief valve is normally mounted off a tee on the header discharging to atmosphere.

VALVES

A diaphragm style, pilot operated pressure relief valve responds only to a high pressure wave. If the standard operating pressure is 105psi (7bar), you can choose to set the relief pressure on the pilot slightly higher: for example, at 115psi (7.5bar). If an overpressure occurs (fast closing valves, etc.), the relief valve quickly opens and discharges water to atmosphere and reduces the overpressure. When the pressure has stabilized, the pressure relief valve closes and normal operation of the system resumes.

Surge anticipating relief valves react to the period of low pressure after a power failure. A second pilot opens the valve whenever the system pressure falls below its set point. How low the second pilot is set should be carefully considered, but it should always be set lower than static less full flow friction. By sensing the dip in pressure, the surge anticipating relief valve has time to be at least partially open when the wave returns, thereby reducing the overpressure. The stable pressure after operation must exceed the pilot setting to ensure the valve closes and does not drain the entire pipeline. Correct sizing of the surge anticipating relief valve is very important and oversizing the surge anticipating relief valve can be a common mistake.

Consulting with the valve manufacturer, or working with a knowledgeable surge consultant, is always recommended.

A relief valve with an intermittent flow capacity of 25% of the maximum flow in the main pipeline is a good initial selection. If larger valves are needed, surge anticipating or “rate of rise� valves are often a better choice. Pressure relief valves do not have to be limited to pump stations and can be strategically located anywhere in the distribution system to deal with overpressures and transients.

It is also important to consider the discharge that is released from the relief valves when they react to the overpressure.

The discharge can often be chlorinated water that poses dire consequences for fish bearing streams, landscaping, etc. A well-considered approach to the proper management of the discharged relief water is always required.

Graph depicting effectiveness of surge anticipating relief valves.

Surge anticipating relief valves need significant static pressure to operate properly. A minimum of 100ft (30m) is typical.

Example of pressure relief valve, installation and applications.

Surge Anticipating Relief Valves Standard relief valves only start to open when the system pressure exceeds the pilot setting. Should the surge increase rapidly, standard relief valves may not have time to open and will then be ineffective.

Sizing concerns for surge anticipating relief valves are similar to pressure relief valves. Selection and sizing are usually based on one quarter of forward flow. This should be verified by a transient specialist and surge anticipating relief valves must be sized correctly.

Surge anticipating relief valves are often a good selection when design criteria calls for valves 6� (150mm) or larger.

This style of valve is often found on larger distribution and trunk mains. One of the most common problems with surge anticipating relief valves is when they are oversized and do not recover or close when the transient is completed.

This is caused by friction from high flow returning due to the static head and insufficient header pressure. Bigger is Pipes, Pumps and Valves Africa - Mar/Apr 2018

27

not necessarily better when it comes to surge anticipating relief valves. It is also very important that the sensing line (copper or stainless steel tubing) is routed directly from the header and not from the valve. This ensures accurate header sensing. Surge anticipating relief valves act as an insurance policy by allowing the valve to start opening before a peak on the transient returns. Surge anticipating relief valves can be easily tested and their operation can be replicated in a static condition in the field. This style of valve is very common and reliable.

altitude valves, modulating float valves and surge anticipating relief valves. Some of the reasons for the successful installation of the surge anticipating relief valves are due to the simplicity of the operation, minimal space and, most important, the valve is purely mechanical (without electrical requirements). Based on the effectiveness of the past installations of surge anticipating relief valves within the network, the utility decided to employ a surge anticipating solution.

Conclusion:

VALVES

Since the installation of the surge anticipating relief valve in June 2005, there have been several power failures in the pipeline. With the presence of the surge anticipating relief valve in the system, the utility has managed to avoid the problems that occurred prior to June 2005.

Examples of surge anticipating relief valves, installations and applications.

Typical Surge Anticipating Relief Valves Application Case Study – Malaysia Anticipating Surge Relief Valve: Size 300mm. The valve is installed in Kelinchi Water Pumping Station in Negeri Sembilan, Malaysia. The main header pipeline diameter is 900mm.

Problem: This pumping station had an unexpected power supply failure, which caused catastrophic damage to the pipeline.

Some of the pipeline ruptured as a result of the sudden rise in pressure, causing the entire pump station to be closed down due to flooding. Since the pumps, valves and fittings were all underwater, the water utility had to engage divers to locate and isolate the supply pressure from the suction.

After accomplishing this, the water was drawn out of the station, and the crew managed to restore the pumps. After this incident, the water utility took extra measures to ensure that the problem would not reoccur.

Objective: The water utility studied proposals from consultant firms that examined the surge that was produced by the pumping station when there was an abrupt disruption in the power supply. In the report, the consultants recommended installing a large surge vessel to minimize the effects of a water hammer during power failures. The space required to install a surge vessel was great, and the cost was prohibitive. The utility wanted to know if a surge anticipating relief valve could offer an alternative solution for the system.

Solution: This water utility had many installations of pilot operated control valves within the network. This included PRV, 28

Pipes, Pumps and Valves Africa - Mar/Apr 2018

Malaysian surge anticipating relief valve installation.

Rate of Rise Relief Valve Rate of rise relief valves add another safety feature to standard relief valves. The valves open when they detect a sudden change in pressure. On power failure, and after the low pressure interval, the returning wave starts building pressure. The rate of rise pilot senses this and immediately opens. The main valve may be partially open even before the system reaches its normal operating pressure, effectively reducing overpressure to an acceptable level.

This valve model is very attractive, as it has positive pressure to force it open and closed. It removes the risk of failure to close, should the pressure not recover.

Rate of rise relief valves are similar to surge anticipating relief valves. The major difference is that downstream static pressure is not required for this valve to operate effectively, so downstream elevation is not required.

The other major advantage of this type of valve is that sizing is not critical. If the valve is oversized, it will recover and close on conclusion of the transient. It is still recommended that the valve be sized for one quarter of forward flow. However, if oversized, the valve will still function as required. The rate of rise relief valve starts opening immediately when pressure begins to rapidly rise. This valve utilizes a nitrogen bladder that allows very accurate sensing of pressure rise. This is an excellent selection if the local topography has minimal static pressure available, or if oversized valves may be specified knowingly or unknowingly. Again, it is always recommended to get a transient specialist to assist in valve sizing, location and selection.

Examples of rate of rise relief valves, installations and applications.

P -C E DL N

CP 7

CP S MP PU

HM

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

CS X

MP PU

MP PU

MP PU

Examples of surge anticipating relief valves (electric), installations and applications.

PO

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

VALVES

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.

This valve is similar to the surge anticipating relief valve, with the exception that the low pressure pilot is replaced with a solenoid valve. All other sizing protocol and design criteria remain the same. No static pressure is required, because the valve closes on a timer. The valve opens on either power loss, or by way of the high pressure pilot. If power loss is the major concern, then this style of valve can be an excellent selection.

Timing for the solenoid to close is normally coordinated with the critical period – the time it takes for the surge return. Always consult with a transient specialist for sizing and selection concerns.

Electronic Control to Respond to Any Out of Limit Signal Any diaphragm operated control valve can be designed to respond to any out of limit signal. A battery and timing device are required. These valves can respond to flow or pressure transmitters utilizing 4–20 mA signals or switches (either ON or OFF). There are numerous variations depending on the application.

www.sam eng.co.za

Surge Anticipating Relief Valve (electrically timed closure after power failure at pumps) Providing customised pump solutions to various industries

Pump design techniques that ensure our pumps are manufactured to last

High performance - high quality products, excellent service

Alloys to suit all applications Proud Manufacturers of SAMCO® Pumps

Pipes, Pumps and Valves Africa - Mar/Apr 2018

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Doubling valve lifespan

P

roblems with the valves can lead to unplanned downtime and equivalent losses in output. This is why saving on valves can end up being expensive.

With the help of Metso’s service experts, the Tarkwa mine has been able to achieve consistent reliability, leading to improvements in the plant’s overall efficiency.

VALVES

Quality issues leading to unplanned downtime Valves play an important role in the CIL (Carbon in Leach) refining process, which Tarkwa mine adopted in 2004, both in terms of their numbers and functionality.

Premature failure has the two-fold outcome of unplanned downtime and subsequent losses in output.

Metso’s Service Sales Engineer for Valves business, Christian Appiah, explains that valves in the mining environment work under extremely demanding conditions. “Valve and actuator failure can arise for a number of reasons. For example, high levels of pollution owing to dust and other contaminants results in very poor air quality. Added to this are the problems of very high ambient temperatures and pressures, not to mention the challenges posed by vibration. An erratic and low-voltage power supply also compounds potential issues,” he says.

Christian goes on to explain that the valves fitted as original equipment to the second-generation plant performed as expected in terms of life expectancy, however it was after routine replacements that problems began to emerge.

Christian Appiah, Metso’s Service Sales Engineer for valves business

“There seemed to be a problem with quality, even in instances where the valves were replaced by seemingly identical products from the same brand. This is something that could be attributed to the use of lower grade materials. One of the challenges in this situation is that supply chains regard valves and similar products as commodities. Price therefore, becomes the main motivating factor behind the buying decision, irrespective of potential consequences down the line.”

Metso has enjoyed a longstanding relationship with Gold Fields Ghana through its supply of heavy duty equipment, including crushers, pumps and mills. It was from this association that Tarkwa was approached with regard to the possibility of sourcing alternative valve requirements from Metso’s Valves business services.

Step changes in efficiency and reliability That was the beginning of an intensive process involving a great deal of groundwork and technical analysis over a five-year period. Christian was deeply involved in the process that ultimately provided the solution to the customer’s needs.

To cover the demanding application requirements, the best fitting valves were selected from Metso’s large portfolio of products for different mining and mineral processing plants. For the Tarkwa mine, the solution was control and on/off valves, including ball, butterfly and 30

Pipes, Pumps and Valves Africa - Mar/Apr 2018

Metso-butterfly-vpvlaxiom2

V-port control valves that had been supplied in 2015 as replacements for items that had reached the end of their working lives.

“This was very much a team effort between technology and sales, and this level of cooperation was essential as CIL is a massive process in a plant of this magnitude. A key component in the planning phase prior to the adoption of Metso products for the CIL process was Nelprof, an advanced software solution that helped us to select the best fitting control and on-off valves for the specific application,” says Christian.

The Tarkwa mine engineering management has been satisfied with the performance of the installed Metso valves as they have yielded step changes in their consistent reliability and the plant’s overall efficiency.

Solomon Boateng puts the positive transition from unreliability to constant productivity into context: “These valves have now given us peace of mind concerning the operation of the critical elution circuit in the CIL process.

The use has been extended to other essential segments of our recovery processes.”

• • •

Design and engineering services Nelprof valve selection software tool Control and on/off valves: o Ball valves o Butterfly valves o V-port control valves

Fact Box: Tarkwa Gold Mine in brief •

Ghana is consistently ranked among the world’s top 10 gold producers. One of the key contributors to this status is the Tarkwa mine operated by Gold Fields Ghana.

• Tarkwa is situated in the southwest part of the country, some 300 km west of the capital Accra. It began opencast mining operations in 1998. Rated as a world-class, lowcost surface mine, the operation is the country’s largest producer of gold, extracting over 14,000 kg (500,000 oz) annually. This is well over 12% of the national total.

• Refining this volume of precious metal requires the operation to annually process an average of around 13,000,000 metric tons of ore-bearing material. In 2004 the mine switched over to using Carbon in Leach (CIL) technology for this process. The CIL plant was expanded in 2009, which resulted in some unexpected consequences: an unprecedented reduction in the lifespan of valves.

Contact Metso South Africa, Tel +27 (0) 11 961-4000, www.metso.com

Pipes, Pumps and Valves Africa - Mar/Apr 2018

VALVES

The dual advantages of the scientific selection and installation of valves to the correct specification and of a durable quality were soon recognized by Tarkwa Engineering management. “There has been significant reduction in downtime and gain in productivity matched by reduced operational expenses,” notes Solomon Boateng, the Plant Engineer for Tarkwa mine - CIL.

Metso’s solutions for Tarkwa Gold Mine:

31

eDart installs an automatic slurry feed splitter VALVES

A platinum concentrator in Rustenburg was experiencing problems with their original feed splitter in the plant keeping an equal split to the two flotation banks. eDART Slurry Valves (Pty) Ltd was asked to assess the feed splitter operations and make corrective recommendations.

R

ichard Rule, Director, eDART Slurry Valves said “The mine had a simple feed splitter to two parallel rougher flotation banks. The aim was to split the feed to the two banks evenly by volume. Originally slurry was pumped from the mill discharge to the head of the flotation cells where the pipe branched off to the two flotation banks. Each branch had a flowmeter and a knife gate valve. The customer had to adjust the knife gate valve manually in an attempt to split the flowrate equally to each bank. The design flow rate to each bank is 540m3/h” said Rule. (See Caption One)

The plant before the upgrade

The Challenge The problem reported by the plant was that it was near impossible to keep an equal split to the two flotation banks.

Firstly, any changes to the process flow or slurry density required manual adjustment of the valves. Secondly, the valves experienced excessive wear (because standard knife gate valves are not suited to control applications).

The Solution “We replaced the two knife gate valves with dual external dart valves complete with positioners for fine control.

The piping layout had to be carefully considered in order to balance the upstream pressure to the two valves.

Downstream of the valves we applied our experience with back pressure pipes to decouple the discharge pipe from the valve. The valves were carefully sized to control near open to minimise additional pressure on the pump which saves operational costs for the plant” said Rule.

“We also carried out velocity studies throughout the system in order to prevent pipe chokes and excessive wear (due to the corresponding increase in slurry velocity in those regions), after which a suitable layout, appropriate to the plant, was developed. Upon receiving customer acceptance and approval we manufactured the new system”.

Installation and Control Philosophy The system was installed and commissioned by eDART’s site team (named Afrivalve Site and Service Department). Two flow control loops, one for each bank, was configured in the customers PLC. Each of these controllers sent signals to the dart valves via the dual valve controllers – a small field mounted, low power, controller that intelligently splits a single signal from the control room to the two valves (rather than allowing two valves positioned in a high velocity, high erosive wear, close to the seat configuration, it will instruct one valve to close and use only the other valve in the low flow conditions). The total flow into the system is measured 32

Pipes, Pumps and Valves Africa - Mar/Apr 2018

The plant after the upgrade

and fifty per cent of this value is used as the setpoint for the two flow controllers.

Start-up and Final Results On start-up, before the control system was tuned, the flow rates were not identical. After the control system was tuned, the flow rates to each bank were very close, within 1 – 2 percentage points. (See the trendline shown in Figure 1)

In Conclusion Fractions of a percentage point improvements in recovery on a flotation bank translates to real money by anyone’s

standards. Having accurate, precise and reliable slurry flow control equipment – like eDART valves installed correctly – is one of the important foundation stones required to achieve improved recoveries. In this case, a manual flow slit between banks using an inappropriate valve for the application is replaced with automated dart valves and back pressure pipes. This will not only improve recoveries in the bank but will increase the plant efficiencies due to reduced maintenance downtime. (See Caption Two)

VALVES

Analysed trendline from the control room

Contact: eDART Tel: +27 (0) 11 823 6620, sales@edart.co.za

FLUID TECHNOLOGY PRODUCTS THAT DELIVER

Our Range of Quality Fluid Technology Products include: • Lubrication Systems • Industrial Valves • Instrumentation

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BMG-FT06122016 - SA Instrumentation & Motion 06 December 2016 11:53:39 AM

Pipes, Pumps and Valves Africa - Mar/Apr 2018

33

Tectra Automation boosts process industry with exstock OMAL ball valves VALVES

Enhanced performance, greater reliability and longer life: that’s the reputation OMAL’s ball valves have built across the world’s process industries over the last 30 years.

O

MAL manufactures a complete range of ball valves for the process industry, which are distributed in sub-Saharan Africa exclusively by drive and control automation specialists Tectra Automation. The company maintains a number of these valves ex-stock, including wafer and split wafer valves and Thor Split Body valves in both carbon steel and stainless steel versions.

The valves are ideal for a wide range of media, including air, water, gas, petroleum and petrochemical products. The stainless steel versions are ideal for highly aggressive media.

The Magnum split wafer, carbon steel Thor Split Body and wafer ball valves are full bore valves without a protruding floating ball for EN 1092-1 ed. 2008 and ANSI B16.5 connecting flanges. Standard features include TFM 1600 soft-seat seals, and TFM 1600 V-pack and additional FKM O-ring seals on the stem for increased durability. These valves are designed according to pressure class PN16-40; ANSI 150-300.

OMAL’s Thor split body stainless steel valves can handle extremely aggressive fluids in process applications.

The stainless steel Thor Split Body valve, for extremely aggressive fluid, features a floating ball and DEVLON softseat seal for the pressure class PN16-40; ANSI 150-300.

Each ball valve delivers a closing angle of >7° and is designed with an EN12662-2 antistatic device.

“These valves can also be manufactured with a wide range of additional features for specialised process applications,” explains Malan Bosman, Pneumatics Product Manager, Tectra Automation. “These include the use of LF2 carbon steel for transferring media down to -40° C; glass- and carbon graphite-reinforced PTFE internal seals; and superficial treatments such as white zinc coating and epoxy coating.”

OMAL is one of only four companies in the world certified to manufacture valves and actuators for the oil and gas industry, and offers a complete range of ATEX-approved solutions for explosive or flammable applications.

These products are designed, manufactured and tested at OMAL’s three state-of-the-art ISO 9001-, AD2000- and UNI EN ISO 14001:2004-certified production facilities in Brescia, Italy.

OMAL is distributed exclusively in sub-Saharan Africa by Tectra Automation, a Hytec Group Company.

Contact Malan Bosman, Tectra Automation, Tel: +27 (0) 11 975-9700, malan.bosman@tectra.co.za, www.hytecgroup.co.za 34

Pipes, Pumps and Valves Africa - Mar/Apr 2018

The Magnum wafer valve is among OMAL’s premium-quality range of ball valves helping the world’s process industries maximise safety, reliability and productivity with precise flow control of liquids and gases.

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 Pipes, Pumps and Valves Africa - Mar/Apr 2018

35

PIPES

Closely-knit customersupplier relationship pays dividends on a challenging pipe project A more than customer-supplier relationship between specialist pipeline contractor, JDC, and thermoplastic piping supplier, Plasti-Tech, was the recipe for success on a challenging pipe installation project recently completed by JDC for Henric Ferro Chrome in the North West Province of South Africa.

I

n business, maintaining strong working relationships means everything. Strong working relationships are entirely possible, but it takes trust and transparency on both sides. A case in point is the relationship which JDC’s HDPE Piping Division has over the past four years forged with thermoplastic piping specialist, Plasti-Tech. The significance of such a strong customer-supplier relationship was recently demonstrated on a challenging pipe installation project which had a very short and stringent timeline where material shortages were out of question.

According to Nadine Roussouw, Contracts Administrator at JDC, the scope of the over R1-million project entailed the installation of 250 mm SDR9 Tailing Pipeline at a cyclone deposit at Henric Ferro Chrome’s Morula Plant just outside of Brits, North West Province. “The project called for the supply and installation of HDPE stub and flanges pipes lengths, fittings and valves,” explains Roussouw.

The project commenced at the start of October 2017 and the pipeline was commissioned by mid-October. “The entire job, including the delivery of pipes, stubs and flanges, butt-welding of pipes, installation of HDPE pipes and commissioning, took 10 days to complete,” explains Roussouw.

As short as the timeline signals, this project was no walk in the park. “Every project has its own uniqueness to it, as well as its obstacles,” says Roussouw. The biggest challenge on this project was getting the material (considering the large quantities and that SDR9 is not so standard) at a very short notice as this was an urgent project request. “Additionally, all the pipe lengths were to be stub- and flanged at our workshop and then get transported to site to save on time,” explains Roussouw.

Roussouw says this challenge was overcome through great service delivery from pipe supplier Plasti-Tech which delivered the stubs on a daily basis in batches, straight to site to allow the extra team to butt-weld the pipes while the other team started laying the pipeline on route and the third team commenced fastening. “Once we got into the rhythm, everything went smoothly right until the very end,” explains Roussouw, adding that a total of 13 people worked on the project.

At a total value of about R800 000, Plasti-Tech supplied 800 m of 250 mm SDR9 pipes in 140 lengths, as well as the stubs and flanges reducers, among other things. Roussouw hails the “excellent” service from the thermoplastic piping specialist.

36

Pipes, Pumps and Valves Africa - Mar/Apr 2018

“We have done business with Brad Chamont (managing member at Plasti-Tech) and his team for the past four years, and we have built an incredible relationship with them over that time. Their service delivery is excellent and the customer service is even better. Brad will always personally go the extra mile to sort out our needs,” says Roussouw.

Roussouw concludes that the success of this project opens up many more doors for JDC and Plasti-Tech as far as future projects and new plants are concerned. “The successes recorded here can always be replicated elsewhere, further building our profile in the execution of jobs of this nature,” concludes Roussouw.

Contact Brad Chamont, Plasti-Tech Piping Systems, Tel: +27 (0) 11 609 5511, Cell: +27 (0) 82 471 5757, brad@plasti.co.za , www.plastitech.co.za

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Customer care: 0860 10 27 99 www.stewartsandlloyds.co.za Pipes, Pumps and Valves Africa - Mar/Apr 2018

37

Multi Alloys – casting a wider product footprint

PIPES

Multi Alloys (Pty) Ltd recently boosted its product offering with the addition of centrifugal castings.

“

With effect from 1st October 2017 we are able to offer customers centrifugally cast pipes and similar axial-symmetric items,” says director Ken Perel.

Established in 1997 and operating from Gauteng’s Midrand business hub, Multi Alloys is an ISO 9001 accredited supplier of nickel alloys, duplex and high alloy stainless steel, titanium and other niche products.

“When a customer asked us to assist with a castingrelated query, we noticed a gap that has emerged in the local market for the supply of centrifugal cast pipe and hollow bar,” explains Perel.

The addition of centrifugal castings complements the company’s basket of offerings and contact was made with Italian foundry, Fondinox. According to Perel, the timing was perfect as this family-owned business was looking to grow its business in South Africa. “So it is a perfect synergy for both companies and an agreement was duly signed appointing Multi Alloys as an agent.”

Centrifugal casting delivers an extremely competitive product with outstanding integrity and, based on the alloy selected, mechanical strength, creep properties and corrosion resistance behaviour can be optimised for the application. “It is possible to obtain a substantial wall thickness thereby creating pipe suitable for demanding service including mechanical applications such as bushes,” adds Perel.

This method presents a number of advantages over static casting/drilling a hole through solid bar: •

The rapid cooling of liquid material in the metallic mould ensures very fine microstructure which imparts beneficial properties.

• Less manufacture steps may be required when compared with alternative production routes.

• Produces less wastage than machining from solid.

• A total absence of gas shrinkage cavities (when compared with static casting) eliminates the need for UT and RT examination.

• Inclusions separation induced by centrifugal action ensures material cleanliness.

• It is a much simpler and faster process resulting in short lead times.

Centrifugal cast pipe / hollow bars are available in external diameters that range from 80 to 1500mm and internal diameters are from 45mm up. Lengths of up to 5500mm as a single piece may be available (longer lengths can be obtained through weld joints).

38

Pipes, Pumps and Valves Africa - Mar/Apr 2018

Centricast items are suitable for a range of applications across a wide spectrum of industries including oil & gas, chemical and petrochemical, mining, waste treatment, lifting machinery, construction, process industries, etc.

Typical applications for tubes centrifugally cast from corrosion resistant alloys include mechanical line pipes in chemical plants and conveyor rolls in pulp and paper industries, dairy, textile, and printing industries. Centrifugal cast high temperature alloy tubes are suited as conveyor rolls for the metallurgical and glass industries, muffles and line pipes and fittings for the petrochemical industry.

Multi Alloys is importing centrifugal castings to customer orders with the stocking of select items under consideration.

With 50 years of experience in the production of steel and nickel-based alloy castings, Fondinox S.p.A. is a leading producer of high value added castings. The company introduced centrifugal casting technology more than 30 years ago. Its manufacturing facilities are compliant with European quality accreditations including ISO 9001 and TÜV. Contact Ken Perel, Multi Alloys (Pty) Ltd, Tel: +27 (0) 466 2480, kenp@multialloys.co.za, www.multialloys.co.za

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MARKET PLACE The Market Place is divided into easy to read colour coded sections to help you quickly find what you need

VACANCY OPPORTUNITIES DEALER LOCATOR PRODUCTS, PARTS AND ACCESSORIES RENTALS SAFETY, TRAINING AND INDUSTRY SERVICES MAINTENANCE & REFURBISHMENT FOUNDRIES Tel: +27 (0) 11 475-0010 Cell: +27 (0) 83 281-5761

SIZE A4 (262mm x 185mm) 1/2 Vertical (262mm x 90mm) 1/2 Horizontal (185mm x 129mm) 1/4 Page (129mm x 90mm)

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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

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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 40

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

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

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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

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

Ainsworth Valves

Mine Track & Tools (Pty) Ltd

VAG-Valves South Africa Klamflex Pipe Couplings

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

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

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

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 PRESSURE REDUCING 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 KNIFE GATE VALVES

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

KLINGER South Africa

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

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

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

REPAIR VALVES

T: +27 (0) 11 394-2066 F: +27 (0) 11 394-2476 E: sales1@industrialvalve.co.za W: www.industrialvalve.co.za 42

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

Tectra Automation 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

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

SAVETY & RELIEF VALVES

Industrial Valves & Engineering Supplies (Pty) Ltd

Agrico

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 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

Pipes, Pumps and Valves Africa - Mar/Apr 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

Pipes, Pumps and Valves Africa - Mar/Apr 2018

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Pipes, Pumps and Valves Africa - Mar/Apr 2018