Safety Relief Valve Body Material Cast Bronze Inlet Type MNPT Outlet Type FNPT Inlet Size 1 1/4 in Outlet Size 1 1/2 in Factory Set Pressure 15 psi Pressure Range 5 to 15 psi 1 200 000 BtuH Disc Material EPDM Overall Height 4 1/2 in Application Low Pressure Steam Heating and Supply Boilers Overall Length 3 3/8 in Seat Material EPDM Spring Material Stainless Steel Temp Range 0 Degrees to 250 Degrees F Test Lever Yes Standards ASME Section IV CRN