Kunkle Safety Valves Models 189, 363, and 389

Heavy duty ASME Section VIII, air/gas cryogenic, “UV,” National Board certified safety valves

Product Features

  • Heavy duty construction provides long service life
  • Unique three-piece disc assembly with PTFE seat/seal offers superior leak-free performance over the entire pressure/temperature operating range
  • Control ring offers precise blowdown adjustment
  • Pivot between disc and spring corrects for misalignment and compensates for spring side thrust
  • Every valve 100% tested/inspected for set pressure, blowdown, and leakage
  • All adjustments factory sealed to prevent tampering and disassembly


  • Connections: FNPT
  • Temperature range -320 to 350°F (-195 to 177°C)
  • Pressure ranges: Model 189: 1000 to 2500 psig (69 to 172.4 barg); Model 363: 50 to 1000 psig (3.45 to 69 barg); Model 389: 50 to 2500 psig (3.45 to 172.4 barg)
  • Code: ASME VIII


Suitable for cryogenic and liquefied air, oxygen, and gas services on multi-stage air and gas compressors, intercoolers, aftercoolers, and receivers. Also for thermal expansion relief and/or full rated capacity discharge and air, gas, and liquefied gas lines and systems.

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