Pilot Operated Pressure Safety Valve

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    • #578
      nasir410
      Moderator

      What are Pilot Operated PSVS (Pressure Safety Valve) on which principle they work?

    • #580
      Nasir Hussain
      Keymaster

      A pressure relief valve or pressure safety valve in which the major relieving device or main valve is combined with and controlled by a self-actuated auxiliary pressure relief valve called a pilot.
      The primary difference between a pilot-operated safety relief valve and a spring-loaded pressure relief valve is that the pilot-operated valve uses process pressure to keep the main valve closed instead of a spring.
      Pilot PSV works on a very simple principle; Greater the area greater will be the force as below
      P=F/A F=P*A at constant pressure greater area will have the greater force and this force difference causes the piston of the main valve to shut during normal operation.

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