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Model 921

Model 921

Pressure Limit:15 to 800 psig
Temperature Limit:-20° to 800°F


  • Air/gas compressors, intercoolers, aftercoolers.
  • Liquid filled pressure vessels/systems, ASME Section VIII (UV).
  • Pressure vessels - containing gas, air, liquid or steam, including tanks and receivers.
  • Vacuum systems including pumps, tanks and equipment.
  • Oil/gas separators.
  • Overpressure relief and protection of pumps, tanks, lines and hydraulic systems.
  • Bypass relief or pressure regulation.

Steel body and bonnet with plain lift lever and stainless steel spring for forced flow steam generators (ASME Section I - ’V’ Special Use or application). 800 psig maximum set pressure.