ASME Section VIII, Air/Gas Cryogenic, 'UV' National Board Certified Safety Valves
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Technical characteristics
- BrandNational
Description
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.
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ASME Section VIII, Air/Gas Cryogenic, 'UV' National Board Certified Safety Valves
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