Kunkle Models 189/363/389 Safety Valves

Safety And Relief Products

Heavy duty asMe section vIII, air/gas cryogenic, ‘Uv’, National Board certified safety valves


  • 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.

General Application

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.

Technical Data

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)