537 Pressure Relief Valve 2 Inch Cast Iron 50 PSI Steam And Hot Water ASME Section IV Overpressure Protection For Low Pressure Boilers And Thermal Expansion Built Tough For Real Boiler Protection

2-Inch Cast Iron Pressure Relief Valve for 50 PSI Steam
✔️ 50 PSI relief, 2" FNPT inlet, 2-1/2" FNPT outlet; single valve

The Model 537 Pressure Relief Valve is designed to vent overpressure in low-pressure hot water boilers and steam systems. It protects equipment from thermal expansion and overpressure caused by control faults, and is suitable for steam and hot water service per ASME Section IV HV.

✅ Inlet: 2" FNPT; Outlet: 2-1/2" FNPT
✅ Cast iron body, A126 Class A/B
✅ Set pressure: 50 PSI
✅ Temperature range: -20°F to 250°F

💡 What is a pressure relief valve used for in boiler and hot water systems?

These devices protect equipment by venting excess pressure to keep systems safe. - Maintains safe operating pressure in steam and hot water circuits
- Prevents overpressure from thermal expansion and control faults
- Helps meet ASME Section IV HV requirements for protection
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