Valves, Actuators & Pump Control


Latest Articles

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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Boiler feed-water leak-off valves
February 2003, Spirax Sarco South Africa
Mitech's boiler feed-water leak-off valves protect boiler feed-water pumps from operating at too low a flow rate. The Mitech valves, which were used in a recent application, replaced other types that ...

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Valve sizing and specifying software
February 2003, Automation Control Solutions
The Firstvue valve-sizing program helps users identify the control valve package best suited to each specific set of service conditions. Firstvue's powerful valve selection features may be used to specify ...

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Protection for LV pump motors
February 2003, NewElec Pretoria
NewElec is offering a compact range of chassis-mounted, microprocessor-based motor protection relays that are designed for low voltage pump motors. The K Series offers complete protection while allowing ...

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Factors affecting control valve performance - Part 3: Valve response time
January 2003, Automation Control Solutions
Good engineering judgement must go into the practice of valve assembly sizing and selection to achieve the best dynamic performance from the loop

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Steam jackets for valve bodies
January 2003, Spirax Sarco South Africa, Integrated Solutions, Products & Solutions
Mitech's steam jackets are designed to keep the valve body at a set temperature. A hot fluid, such as steam, is circulated around the valve body keeping the fluid inside both warm and in a liquid state. ...

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Factors affecting control valve performance - Part 2: Actuator-positioner design
December 2002, Automation Control Solutions
Positioner designs are changing dramatically, with microprocessor devices becoming increasingly popular

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Effective pump vibration monitoring
December 2002, Temperature Controls
Compact, lightweight and self-contained, the Defender vibration sensor from Monitran allows end-users to easily identify changes in motor bearing or impellor wear over time and therefore predict how and ...

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Factors affecting control valve performance - Part 1
November 2002, Automation Control Solutions
The non-uniformity inherent in raw materials and processes of production is a common cause of variation of the process variable both above and below the set point

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Hazardous chemicals sampling valve
November 2002
DLM, the local distributor for Swiss company, Technova, has recently launched a new sampling valve. The ISV-B series, with sampling bottle, is suitable for the chemical industry as it provides safe and ...

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Mobile valves feature spool position signal for PLCs
October 2002
An electrical spool position signal has been added to Walvoil standard mobile valves available from Ernest Lowe (ELCO). Italian-based leading mobile valve manufacturers Walvoil, part of the Casappa group ...

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Discharge valves for platinum mine
October 2002, Spirax Sarco South Africa
Mitech's locally designed and manufactured discharge valves are being used in a platinum mine to control the level in the floatation cell. Commonly known as dart valves, they are supplied as self-contained ...

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Long-lasting zero leakage ball valves
October 2002, Spirax Sarco South Africa
A range of flanged ball valves is available locally that operate in high temperatures, under high pressures and in corrosive environments. Due to their robust design, the valves are supplied with a 4-year ...

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Easy-to-use low torque electric actuators now available
October 2002
The Industrial Measurement and Control business of Honeywell is offering three new models to its HercuLine family of actuators. The HercuLine 2000 and the HercuLine 2001 and 2002 smart actuators are low ...

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DLM moves to new facility following unprecedented growth
September 2002
DLM is well known to the local instrumentation and control industry with its broad range of product offerings in overpressure protection, flow, level, and density measurement, automation and control. ...

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Some relief for pumps
August 2002
The model 480/490 is a spring-loaded liquid relief valve, certified to BS6759 Part 3 by SAFED/AOTC and is unlike any other valve in its range. The design features of this valve make it suitable for pressure ...

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Fast-acting linear actuator
August 2002, Spirax Sarco South Africa
Mitech recently designed and manufactured a fast-acting piston-driven linear actuator for the power industry. The actuator was fitted to a bypass valve designed to prevent turbine overspeed. The process ...

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Lime dosing control valves
August 2002, 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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