Models 189, 189C, 189P, 363, 363C, 363P, 389C, 389P

Model Descriptions:

ASME Section VIII, Air/Gas Cryogenic, “UV” National Board Certified Safety Valves

• Model 189: Bronze housing with stainless steel (SS) trim (nozzle and disc) with Teflon® seat/seal in disc. Plain lift lever.  
• Model 189C: Same as Model 189 except pressure-tight cap for gas service only.  Suitable for maximum back pressure of 50 PSIG.
• Model 189P: Same as model 189 except pressure-tight packed lift lever. Suitable for maximum back pressure of 50 PSIG.
• Model 363: Bronze housing with SS trim (nozzle and disc) with Teflon® seat/seal in disc. Plain lift lever.  1000 PSIG maximum set pressure.
• Model 363C: Same as Model 363 except pressure-tight cap for gas service only.  Suitable for maximum back pressure of 50 PSIG.  1000 PSIG maximum set pressure.
• Model 363P: Same as Model 363 except pressure-packed lift lever.  Suitable for maximum back pressure of 50 PSIG.  1000 PSIG maximum set pressure.
• Model 389C: All SS with Teflon® seat/seal in disc. Pressure-tight cap for gas service only.   Suitable for maximum back pressure of 50 PSIG.
• Model 389P: Same as Model 389C except pressure-tight packed lift lever. Suitable for maximum back pressure of 50 PSIG.

Features:

• Unique three-piece disc assembly (with Teflon® seat/seal) offers superior leak-free performance over pressure/temperature operating range.
• Warn ring offers precise opening with minimum pre-open or simmer.
• Pivot between disc and spring corrects for all misalignment and compensates for spring side thrust.
• All adjustments are factory sealed to prevent tampering and disassembly.
• Each Kunkle valve is tested and inspected for pressure setting and leakage.

Applications:

• 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.

Pressure and Temperature Limits:

• Model 189
• 1000 to 2500 PSIG
• -320° to 350°F
• Model 363
• 50 to 1000 PSIG
• -320° to 350°F
• Model 389
• 50 to 2500 PSIG
• -320° to 350°F

Please refer to the Kunkle Catalog or Contact for additional information.