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Models 189, 363, 389

Bronze housing with SS trim (nozzle and disc) with Teflon seat/seal in disc. Plain lift lever.


  • Unique three-piece disc assembly (with Teflon seat/seal) offers superior ’leak free’ performance over the entire pressure/temperature operating range.
  • Control ring offers precise adjustment of blowdown.
  • Pivot between disc and spring corrects for all misalignment and compensates for spring side thrust.
  • Every valve 100% tested/inspected for set pressure, blowdown and leakage.
  • All adjustments are factory sealed to prevent tampering and disassembly.

Model 189

Pressure Limit:1000 to 2500 psig
Temperature Limit:-320° to 350°F
2 Sizes (Inlet & Outlet):1/2'' & 3/4'' , 3/4'' & 3/4''


  • Cryogenic ’cold’ and liquefied air, oxygen and gas service.
  • Multi-stage air and gas compressors, intercoolers, aftercoolers and receivers.
  • Thermal expansion relief and/or full rated capacity discharge.
  • Air, gas and liquefied gas lines and systems.