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control valve

Basics of Control Valve Positioners

The control valve positioner is a field device that is used to increase or decrease the pressure of instrument air load driving the valve actuator of the control valve. Until the stem of the control valve travels and reaches the balanced position as directed by the process controller. Generally for the linear sliding stem control, …

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Control Valve Body Materials

Actuator: An actuator is an electric, hydraulic, or pneumatic-powered device that supplies a force and motion for the opening or closing of a valve as the signal is received by the controller. An actuator is also used for the sequencing of valve operations. Control Valve: It is a valve that controls the rate of flow …

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Thumb Rules and Tips for control valves selection and sizing

Control valves in process industries are used to regulate various fluids and to control important process parameters like flow, level, temperature, pressure, and so on. The tips and rules of thumb that engineers used in selecting and sizing control valves are fuzzy, and applying alternative rules may lead to conflicting answers. Rules of thumb must …

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