Safety Relief Valve Body Material Cast Bronze Inlet Type MNPT Outlet Type FNPT Inlet Size 1 in Outlet Size 1 in Factory Set Pressure 15 psi Pressure Range 5 to 15 psi 643 000 BtuH Disc Material EPDM Overall Height 2 1/16 in Application Low Pressure Steam Heating and Supply Boilers Overall Length 5 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