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control valve's purpose
The purpose of the Control Valve is to regulate the flow rate of fluids through pipes in the system. This is accomplished by placing a valve in the path of flow of liquid. It acts to offer resistance to the flow of a liquid, where the resistance and flow can be controlled by a signal from a process control. This signal is derived from the sensors in the plant. It is to be noted that when a control valve is supplied by the manufacturer it is attached to an actuator- it uses the controller signal to activate the final control element.
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2012-06-21