- A valve with a pneumatic, hydraulic, electric or other externally powered actuator that automatically opens or closes the valve fully or partially by the signals received from controlling instruments is called control valve.
"A control valve is a valve used to control fluid flow by varying the size of the flow passage as controlled by a signal from a controller."
Parts of Control Valve:
- Bellows
- Positioner
- Stem
Input Signals:
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