Valves, Actuators & Pump Control


Latest Articles

Knife gate valves ensure trouble free control
May 2003
Selecting the correct valve for control applications normally poses many challenges to control engineers. In applications where fluid media with a significant solid content is difficult to control with ...

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Factors affecting control valve performance - Part 6: Conclusion - economic results
April 2003, Automation Control Solutions
The control valve assembly plays an extremely important role in producing the best possible performance from the control loop

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Lime dosing control valves
April 2003, Spirax Sarco South Africa
Mitech's locally designed and manufactured lime dosing control valves are erosion resistant and fit in the ring main. They have an anti-clogging design and are trim sized to suit the process data. Rated ...

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Ball valve endures the test
April 2003, Spirax Sarco South Africa
The standard metal-seated manual ball valve from Valvtechnologies is supplied with a four-year warranty when used for high-pressure water and steam isolation duties in power stations. This is of particular ...

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Ball valves with 100% shutoff
April 2003, Spirax Sarco South Africa
Valvtechnologies' metal-seated ball valves are designed to operate in high temperatures, under extreme pressures, in erosive environments. Their integral seat design improves performance over conventional ...

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Valves for low and high temperature gas applications
April 2003, Spirax Sarco South Africa
Mitech's damper valves are specifically used by the local industry and their largest damper supplied to date is 1,8 m in diameter and was made from stainless steel. The locally designed and manufactured ...

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Electric actuator - an easy solution for complex processes
April 2003
Complicated processes do not always require complex solutions. Utilising actuators for precise positioning of dampers and valves in process control can help to improve efficiency, reduce waste, and lower ...

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On the selection of valves
April 2003
Valve selection in the main is an arbitrary subject. It can be based on many factors such as tradition, operational experience, perceived suitability for process conditions, operational lifespan requirements, ...

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Electric valve actuators ready for the latest fieldbus systems
March 2003
The ELQ series plug in modules are used for a broad range of control options enabling the basic actuator specification to be easily extended to that of fully-fledged control valve actuator

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Control valve supplier for demanding applications
March 2003
DLM offers a comprehensive range of products sourced from leading international manufacturers, providing optimum solutions in a wide range of industries

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Factors affecting control valve performance - Part 5: Valve sizing
March 2003, Automation Control Solutions
When selecting a valve, it is important to consider the valve style, inherent characteristic, and valve size that will provide the broadest possible control range for the application

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Valves open new opportunities for the Cape
March 2003, Atelier SA, Surveillance
Internationally accredited valves from GSR Valve Technology now available ex-stock and with full local support in South Africa. The company has chosen to invest in full branches in the Cape, Port Elizabeth ...

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Tank blanketing valve
March 2003, Spirax Sarco South Africa, Commercial (Industry)
Tank blanketing is the injection of a gas into the vapour space of a liquid storage tank. This is done to maintain a blanket of gas above the stored liquid to prevent atmospheric air entering the tank, ...

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Valve connectors with snap-in connectors speed up cabling
March 2003, Phoenix Contact
Actuator cables with individual cable lengths can now be prepared quickly and cheaply with the new SACC-VQ valve connector using the Quickon snap-in connection technique from Phoenix Contact - without ...

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Crown plug valves optimised for indoor climate control
February 2003
TAC Venta is said to be the market's first range of HVAC valves to IEC 534

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Digital valve actuator is flexible and easy to install
February 2003
Field Q is a single-sourced automation solution with easy installation and environment-proof protection

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Factors affecting control valve performance - Part 4: Valve type and characterisation
February 2003, Automation Control Solutions
It is important to select a valve style and size that will produce an installed flow characteristic that is sufficiently linear to stay within the specified gain limits over the operating range of the system

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Globe control valves for high pressures
February 2003, Spirax Sarco South Africa
Mitech's globe control valves are suitable for high-pressure applications and extreme temperature conditions. Locally designed and manufactured, they can be adapted for use with various corrosive fluids ...

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200 mm control valve drops 67 MPa
February 2003, Spirax Sarco South Africa
There are only a limited number of mechanisms that can be used to dissipate energy and to drop the pressure gradually so that high velocity/low pressure regions can be avoided, essential if the valve ...

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Self-contained dart valves
February 2003, Spirax Sarco South Africa
A range of specialised dart valves is designed and manufactured by Mitech according to the client's specifications. Both plug and seat can be made from various materials, however, the most popular is ...

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