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Control Valve (Handled by Instrumentation Department)

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These valves are self operated type. They have actuators. Actuators operate on the signal received from an instrument. They are used for very fine throttling and to have desired process parameters (pressure, temperature, flow) of fluid.
Control valves can be of the following types based on parameters to be controlled:
1) Pressure control valve – Receives signal from pressure indicator / pressure transmitter.
2) Temperature control valve – Receives signal from temperature indicator / temperature transmitter
3) Flow control valve – Receives signal from flow indicator / flow transmitter
There are two types of signal:
1) Pneumatic – Valve has pneumatic actuator. (tubing is used)
2) Electric – Valve has electrical (solenoid) actuator. (cables are used)

Based on construction, control valve has following types:
1) Butterfly valve
2) Globe valve
3) Ball valve
A) End connection:
Flanged end or BW. Flange end is always preferred because of regular servicing & maintenance.
B) Material :
Same as other cast steel valves.
C) Design & dimension standard:
Same as other valves.
D) Pressure class:
Same as other valves.

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