A self actuated pressure control valve can be used to control the pressure at either upstream or downstream of the control valve. If the pressure upstream to the valves is used to throttle the control valve, then the upstream pressure is maintained at a specified set point and such a valve is known as a backpressure control valve, as it maintains the backpressure imposed by the control valve. If pressure at immediate downstream point of the valve is used as a signal to throttle the control valve, then the downstream pressure is maintained at a specified set point and such valves are known as self actuated pressure control valves.

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2012-08-10

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