How a Typical Control Valve Loop Works
The control valve is a very useful control element. It is in fact the final control element in any control loop that must regulate fluid. The purpose of the control valve is to provide the means of adjusting or actuation of a control strategy for a given process operation.
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Typically the control valve is required to behave as a means of adjusting flow or pressure conditions in a process plant or in an item of plant equipment such as a compressor. To understand the control valve loop, let us look at the basic elements in the control loop of the valve.
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