Models 189, 363, 389

ASME Section VIII, Air/Gas Cryogenic, ‘UV’ National Board Certified Safety Valves

Model Descriptions

• Model 189: Bronze housing with 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 tight cap for gas service only. 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 a 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.

Pressure and Temperature Limits

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

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.

Options
No Options Available

Features and Benefits

• 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 betwee 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.