Model 215V is Non-code Vacuum Relief. Model 337 is ASME Section VIII Air/Gas “UV” National Board Certified Safety Valve. Has “lift-pin” lift device for easy manual testing. All adjustments are factory sealed to help prevent tampering or disassembly. Both are PED Certified for Non-Hazardous Gas.
Vacuum Limits Model 215V: 2" Hg to 29" Hg [67.7 mbarg to 982 mbarg] -20°F to 406°F [-29°C to 208°C] Pressure and Temperature Limits Model 337: 1 psig to 60 psig [0.07 barg to 4.1 barg] -20°F to 406°F [-29°C to 208°C]