Pressure Relief Valve One And A Half Inch Cast Iron 50 PSI Steam for Low Pressure Hot Water Boilers ASME Section IV 0537-G01-HM0050 Thermal Expansion Overpressure Relief

1-1/2in Cast Iron Pressure Relief Valve for Low-Pressure Steam
✔️ 50 PSI set, single unit, 1-1/2in FNPT inlet, 2in FNPT outlet

The Model 537 Safety Relief Valve relieves overpressure in low-pressure hot water boilers and steam systems. It uses a 1-1/2in FNPT inlet, a 2in FNPT outlet, and a cast iron body suitable for ASME Section IV service. Set at 50 PSI with a temperature range from -20°F to 250°F, it handles liquid or steam relief when thermal expansion occurs or in overfiring conditions.

✅ Model 537 safety relief valve for steam and hot water systems
✅ Set pressure: 50 PSI
✅ Inlet: 1-1/2in FNPT; Outlet: 2in FNPT
✅ Body: Cast Iron A126 Class A/B
✅ ASME Section IV compliant
✅ Temperature range: -20°F to 250°F
✅ Tested for pressure setting and leakage

💡 What is a pressure relief valve used for in boiler systems and why choose a 50 PSI setting? This safety device vents excess pressure to prevent equipment damage and hazards.
- relief valve function in low-pressure steam and hot water systems
- ASME Section IV compliance and 50 PSI set point
- inlet/outlet sizing and durable cast iron body

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