Engineering Technologies Anderson Greenwood Crosby Sanmar POPRV – Series 400

Anderson Greenwood Crosby Sanmar Limited

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POPRV – Series 400

SERIES 400 MODULATING SAFETY RELIEF VALVE

The Series 400 modulating valve, with non-flowing pilot, incorporates an advanced design in pilot operated valves. Under process conditions, main valve can be seat tight to as high as 98 percent of set pressure. The main valve lifts proportionally according to required flow (relief demand), restricting product loss to only the mass required to be relieved to prevent process pressure from exceeding the code allowance.

GENERAL APPLICATION

The Series 400 is well suited for gas and/or liquid services, including dirty and/or wet services. The modulating action is strongly preferred for liquid relief because it minimizes the destructive effects of ‘liquid hammer

FEATURES

  • Increased system output with main valve seat tightness to 98% of set pressure without leakage.
  • Balanced design ensures proper valve operation and lift unaffected by back pressure, eliminating the need for costly and fragile metal bellows.
  • Unique field test capability allows accurate set pressure verification with valve in service. No system isolation block valve required.
  • Soft seats greatly extend service life and reduce maintenance cost, eliminating expensive metal seat lapping.
  • Reduced product loss and pollution through soft seats for premium tightness before and after relief cycles. Modulating action relieves minimum product to prevent overpressure.
  • Suited for dirty or wet service with non-flowing pilot minimizing entrance of dirt and formation of hydrates. Low velocities ensure most particles drop out upstream of pilot inlet screen.
  • Modulating action minimizes flow and resultant noise during normal system upset, reducing noise abatement costs.
  • Rugged bracket pilot mounting protects against vibration and careless handling.
  • Easy, single set pressure adjustment is accurate and dependable.
  • Minimal blowdown as the valve reseats slightly below set pressure.
  • ASME Section VIII and Section XIII (UV Designator) Code Stamp for gas and liquid service and CE mark to European PED 2014/68/EU.
  • High Gain Modulating Action option available on the Series 400 pilot provides full main valve lift by 5% overpressure while minimizing product loss during relief events in DOT applications.

TECHNICAL DATA

  • Sizes: 1″ x 2″ to 10″ x 14″ (DN 25 to 250)
  • Orifices: 0.110 to 63.5 in2 (0.710 to 409.7 cm2)
  • Inlet ratings: ANSI Class 150 to 600
  • Temperature range: -65°F to + 600°F (-54°C to + 315°C)
  • Set pressures: 15 to 1480 psig (1.03 to 102 barg)
  • Code: ASME VIII and XIII (UV Designator)

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