Pressure Safety Relief Valve Body Material Bronze Inlet Type NPT Outlet Type NPT Inlet Size 3/4 in Outlet Size 3/4 in Factory Set Pressure 30 psi 510 000 BtuH Disc Material Silicone Overall Height 2 3/4 in Application Hot Water Heating Boiler Equipment Seat Material Bronze Spring Material Stainless Steel Temp Range 250 Degrees F Test Lever No Compliance ASME Standards ASME