general
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Issue 6 2020
Pfeiffer Vacuum expands the HiLobe line of intelligent high-performance Roots pumps •
Diverse applications in the low and medium vacuum range • Large variety of Roots pumping stations • Wide nominal pumping speed range up to 6 200 m³/h
P
feiffer Vacuum, a world leading provider of vacuum technology, has expanded its HiLobe series. Roots pumps are available in a broad spectrum of pumping speeds and applications. The pumps can be used for numerous industrial vacuum applications, including electron beam welding, vacuum furnaces and freeze drying. HiLobe Roots pumps are particularly suited for rapid evacuations (lock chambers or leak detection systems), as well as for general coating applications. With their individual speed control, the pumps can be adapted
to customer-specific requirements. Compact Roots pumps handle a wide range of nominal pumping speeds up to 6 200m³/h. Thanks to their powerful drive concept, they achieve around 20 percent shorter pump-down times than conventional Roots pumps. Rapid evacuation also saves costs and increases the efficiency of production systems. The HiLobe series boasts an over 50 percent reduction in maintenance and energy costs compared to conventional Roots pumps. This is due to the use of energy-efficient drives that already meet the future IE4 energy efficiency class. The reduction is also contributed to the optimised rotor geometries of the pumps and the unique sealing concept. The pumps are hermetically sealed from the atmosphere and have a maximum integral leak rate of 1 to 10-6Pa m³/s. Dynamic seals are eliminated, thus making maintenance necessary only every four years. Cost-intensive water cooling is not necessary since HiLobe
Roots pumps can also be operated at ambient temperatures of up to +40°C using flexible air cooling. The intelligent interface technology of the HiLobe ensures optimal process adjustment and condition monitoring. This facilitates proactive and efficient operation. The integrated condition monitoring provides information on the state of the vacuum system at all times. Condition monitoring also increases system availability since maintenance and service work can be planned expediently and with foresight to prevent cost-intensive production downtimes. These advantages result in a long service life and maximum operational reliability. The vacuum pumps can be mounted
either vertically or horizontally to suit the existing system. This maximises pumping speeds and makes more efficient and customised use of the available space at the customer’s production facility. Vacuum pumping stations consist of various pump combinations augmented with suitable components, valves and gauges. Pfeiffer Vacuum has a large variety of Roots pumping stations with different backing pumps, gradations and accessories. Roots pumping stations are used in low and medium vacuum applications and are a reliable solution offering high pumping speeds in the transition range from atmospheric pressure to 10-3hPa. The right combination of different vacuum pumps creates a perfect solution for applications in production and research.
AIR & VACUUM TECHNOLOGIES (PTY) LTD 0861 VACTEC (822 832) info@vactech.co.za www.vactech.com
Pfeiffer Vacuum CombiLine
Pfeiffer Vacuum HiLobe
Eltra ELF Economy Chamber Furnaces
T
he ELF laboratory furnaces comprise three bench mounted models designed for light duty and general use up to 1 100°C. These laboratory furnaces have a simple drop-down door and a top mounted ceramic chimney. The combination of low thermal mass insulation and free radiating wire elements embedded in the chamber sides provide efficient heating. Standard features • 1 100°C maximum operating temperature • 6, 14 or 23 litre chamber volumes • Drop down door with air gap to minimise external temperature • Carbolite Gero 301 controller, with single ramp to set point & process timer • Delayed start / process timer function as standard • Vacuum formed, low thermal mass insulation • Hard ceramic hearth fitted as standard • Ventilated via top mounted ceramic chimney.
The smart way to monitor flow - KAL-D calorimetric flow meter
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nstrotech offers Kobold KAL-D flowmeters, an integrated microcontroller that allows users to optimally adapt the device to their individual process conditions. Its intelligent compensation function ensures stable switching points, even during significant temperature fluctuations.
VERDER SCIENTIFIC (PTY) LTD Tel: (010) 612 0141 sales@verder-scientific.co.za www.verder-scientific.com
The electronic flow monitor model KAL-D works according to the calorimetric principle, continuously monitoring water-based liquids. The sensor tip is heated to a few degrees above the temperature of the flowing medium. When the medium flows, heat generated in the probe is dissipated by the medium. In other words, the probe is cooled down. This cooling sequence precisely measures the flow velocity. The sensor signal is compared with reference data stored in a microcontroller. An alarm signal is generated when the desired flow velocity is reached. Simple calibration and optimal temperature compensation are achieved with a microcontroller. Kobold KAL-D finds service in all applications where flow currents, with minimum pressure loss, need to be accurately monitored. The one-part design of the measuring probe also considerably reduces dirt sensitivity. Calorimetric indicator/switch KAL-D’s key features: • Switching range: 0.04m/s ... 2m/s (liquids); 1 ... 20m/s (air) • Connections: G ¼, G ½, ¼” NPT, ½” NPT, M12 x 1 • Material: stainless steel • Max pressure: 100 bar process
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pressure Max temperature: 120°C process temperature Repeatability: ±2% Wide range of process connections; easy to customise, commission and install No moving parts.
INSTROTECH Tel: (010) 595 1831 sales@instrotech.co.za www.instrotech.co.za
