What is a control valve and what is its function?

A control valve is usually used to control the flow of a fluid, behaving like a variable area orifice, which modifies the pressure drop, as directed by the signal from a controller. ​ This valve enables you to regulate flow and other factors such as pressure, temperature or level.

CWith regard to general characteristics, these valves must resist the temperature and the pressure of the fluid without leaking; have an adequate size for the flow that is to be controlled; and resist erosion or corrosion by the fluid they control.

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