Valves, Actuators & Pump Control


Latest Articles

SA's own control-valve sizing program
August 2001
Mitech has recently released what it claims to be the first computerised control valve sizing program to be written in South Africa. Windows-based, this program runs on any PC operating in a Windows environment, ...

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Control valve specification made fast and accurate
August 2001
FirstVue valve sizing software helps the user identify the control valve package best suited to each set of service conditions. Its powerful valve selection features can be used to specify either a single ...

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Fast-switching valves feature long operational lives
July 2001
Experience from Formula 1 motor racing has proved that only a combination of maximum speed and stamina makes a champion. Just like the new high-speed valves Type MH...2- from Festo. Fast switching times ...

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Turbine valve monitor
June 2001, Switches International
GO Switch/Topworx, which has been producing the ultra reliable GO switch since 1950, is offering the Defender turbine valve monitoring system. This is a simple drop-in unit that replaces the often less ...

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Hygienic angle valve
May 2001
Mitech's locally designed and manufactured hygienic angle valve is available for the food, beverage and medical industries. The valve is claimed to have a higher pressure rating compared to imported models. ...

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Explosion proof valve controller for dangerous environments
May 2001, Valve & Automation
The Westlock Accutrak Eliminator 9000 is specifically engineered for the monitoring and control of diaphragm valves. Certified to UL and CSA, the 9000 Series utilises high current, hermetically sealed ...

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DLM - measurement and control solutions for the industrial and process markets
May 2001
In these days of change and uncertainty it is often difficult to find a supplier that has more than 50 years experience. A remarkable exception to this rule is Dupleix Liquid Meters (DLM). In this era ...

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AS-i valve monitor and control
April 2001, Switches International
Topworx (GO Switch), has recently launched its digital valve monitors/controllers, which are available in either AS-i or DeviceNet platforms for rotary actuators. These low-cost intelligent devices provides ...

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Valve sizing software package
April 2001
All control valves should be selected to suit the application if they are to perform well over a long period. A significant proportion of all control valves are oversized and control too close to the ...

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Dual valve sealing doubles the benefits for chemical company
April 2001
Fugitive emission detection (FED) ball valves from Hindle, normally used to prevent leakage of critical services to atmosphere, are also being ingeniously used by Elf Atochem to ensure zero air ingress ...

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Chemical-resistant valve positioners
March 2001, Valve & Automation
The AccuTrack Series 1000 from Valve & Automation combines chemical resistance with high-impact strength and immunity to weathering. Unaffected by electrolytic corrosion and high concentrates of alkalies, ...

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Noncontact position monitoring for rotary valves
March 2001, Valve & Automation
The Epic noncontact position transmitter represents a significant departure from previous attempts to reliably measure the position of rotary control valves. As opposed to conventional devices, couplers ...

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Compact on/off control solution for process control valves
March 2001, Bürkert South Africa
The Bürkert MiniTOP combines valve control, pilot valves and position feedback in a unique compact unit. In line with its strategy to offer customised system solutions at all levels of process automation, ...

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Portable pump stations launched
March 2001
Chick Henderson, a leading supplier of industrial pumps and hoses, has developed a revolutionary range of modular pump stations. These self-contained pump stations, housed in appropriately reinforced ...

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Parallel slide gate valves
March 2001
The Parallel Slide Gate valve from Valvtechnologies provides a bubble tight shut-off, a live loaded stuffing box, protected seats and a reliable and repeatable shut-off. Sealing surfaces are coated with ...

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Versatile valve island/bank
March 2001
SMC's Type SY 3000/5000, 5-port solenoid valve assembly is one of the most versatile valve assemblies available. Fully compatible with AS interface, Profibus-DP and Device Net, the assembly features: ...

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Final control elements - Part 3: Hysteresis and deadband
March 2001, Michael Brown Control Engineering
One of the biggest problems associated with the final control element is hysteresis and backlash. This can be roughly defined as the maximum difference obtained in stem position for the same input up-scale ...

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Letdown stations - methods for superheating steam
February 2001
The secret of success for any desuperheater is to ensure that the water atomises into a fine spray so that the water droplets can be absorbed by the steam

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Intelligent control valves for Chinese paper mill
February 2001, Valve & Automation
The Nine Dragons paper mill in China has recently installed NAF control valves, positioners and diagnostic software. The valves are used for fluids typical in board machine application; these include ...

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AS-i valve monitoring and control
February 2001, Switches International
Topworx (GO Switch), as a leader in on/off valve control, has recently launched its digital valve monitors/controllers which are available in either AS-i or DeviceNet platforms for rotary actuators. These ...

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