A control valve can be used to control pressure, pressure drop, flow and temperature in any system where there is a fluid flowing through a pipe that needs to be controlled. Control valves are commonly referred to as “final control elements,” which convert a signal from the process controller into the desired adjustment to the process. A control valve (with its associated actuator) does this by adjusting the size of its flow passage, based on the signal received.
Many parameters help determine which control valve to select for a given application. The choice, often complicated, can become even more so for control valves destined to handle severe flow conditions.