Pressure control valves are direct operated hydraulically cushioned valves. These are used to control sequencing, unloding or back pressure of oil flow in a hydraulic system. The control can be initiated by sensing the pressure rise internally (directly from it's inlet port A) or remotely (from it's remote pressure control port X). The valves with auxilliary pilot pressure port P(Model PCV20E/F/G/H) can be actuated by lower remote pressure than that is required at normal remote pressure control port. prism hydraulics catalogue prism pressure relief valve prism hydraulics distributor prism pilot operated check valve hydraulic pcm block hydraulic valves manufacturers in belgaum