Valves, Actuators & Pump Control


Latest Articles

Electric failsafe actuator
June 2005
Yokogawa SA is the sole distributor for Kinetrol in Africa. One of the products it offers is an electric failsafe actuator. This is an actuator that works with an electric hydraulic control system. This ...

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Economical butterfly valves
June 2005
Tyco Valves & Controls has introduced a series of new, high quality, reliable and economical butterfly valves for general-purpose industrial applications. The cost-effective PremiSeal range is designed ...

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Control loop questions answered
June 2005
Michael Brown answers your control loop questions I like to read your column on process control in loop signature series, because I think it is suitable for practitioners without leaving behind the theoretical ...

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2-position, 3-way, poppet style solenoid cartridge
May 2005
Sun is now offering its Model DWDA solenoid operated, 2-position, 3-way, full-flow, balanced poppet cartridge valve. All flow paths are fully bi-directional, and closed paths are blocked in both directions. ...

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Intelligent field devices
May 2005, Valmet Flow Control South Africa
Smart field devices are being continuously developed to support and benefit end-users in their daily operations. Wizard-based guided start-up, advanced devices, process diagnostics, device optimisation ...

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Knife gate valve reduces maintenance costs
May 2005, Dupleix Liquid Meters Flow Control (DLM)
DLM's Rienzi knife gate valve is locally manufactured in an internationally unique process that extends the product's lifespan and reduces maintenance costs. Manufactured and distributed in southern ...

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Gas and liquid valve now certified for steam
April 2005, Dupleix Liquid Meters Flow Control (DLM)
The 716H high-pressure valve, previously certified for use with gas and liquid applications has now been developed further. The National Board of boilermakers has now certified the 716H on steam to ASME ...

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Forged high-pressure valves
April 2005, Spirax Sarco South Africa
The flagship of the Valvtechnologies' product line, includes integral seats, RAM hard coatings, a blow-out proof stem and live-loaded packing. Primarily used in high-energy applications in the power industry, ...

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Problems in a Canadian plant
April 2005, Michael Brown Control Engineering
Case History 82 People often ask me if I find the same sort of problems in plants in countries other than Africa. My reply to this is that in every plant, in every country that I have visited, there ...

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Loop optimisation questions answered
March 2005, Michael Brown Control Engineering, Access Control & Identity Management
Readers occasionally e-mail Michael Brown with questions after reading his articles. Michael felt - and I agree - that by publishing some of the discussion, it would probably be of value to others who ...

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Process control loop management services
March 2005, Protea Automation Solutions, Products & Solutions
Protea Automation Solutions has introduced a range of comprehensive loop management services. The services are available for the I/A Series automation system from Foxboro as well as other process control ...

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Pump control and monitoring using GSM cellular networks
March 2005, Omniflex Remote Monitoring Specialists
Omniflex has developed a Scaleable Telemetry Outstation for GSM cellular networks to support short message service (SMS) transmission of data from remote outstations that require monitoring and control. ...

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Versatile valve positioner
March 2005
The FY301 microprocessor-based positioner provides fast and accurate positioning of diaphragm or cylinder actuators. The FY301 produces a pressure output as required to position a control valve according ...

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Fail-safe control valves in case of fire
February 2005, Samson Controls
The use of pneumatic control valves can now be taken into consideration even where sensitive applications are concerned

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Intelligent control technology reduces idle time
February 2005, Festo South Africa
More space in the control cabinet with Festo FEC controllers – wiring costs are reduced by 40% and installation costs by 50%.

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Powerful actuators for the Mozambique gas line
February 2005, Spirax Sarco South Africa
Last year Mitech supplied the two largest actuators it has made on 900 mm ASME900# ball valves, to be used for shutting off the main gas line from Mozambique to Secunda. The Mitech Megatorque range ...

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Valve controller with valve parameter feedback
February 2005
The new Gefran 800 V controller comes with valve parameter feedback making valve controlled processes uncomplicated. Procedures that are valve controlled are often difficult to control accurately as the ...

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Good control requires obedient valves
February 2005, Michael Brown Control Engineering
A feedback controller effectively calculates the amount of product that is required to be fed into the process. If, for example, the output (process demand - PD) of the controller is sitting at 50%, the ...

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Understanding steam conditioning valves
December 2004, Automation Control Solutions
A steam-conditioning valve is used for the simultaneous reduction of steam pressure and temperature to the level required for a given application.

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Actuators for many applications
December 2004
Proportional control of pneumatic actuators is an area that SMC believes it has provided a solution for just about every application. Its proportional control instruments cover a range that includes linear ...

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