Safety Relief Valve Body Material Bronze Inlet Type FNPT Outlet Type FNPT Inlet Size 1 in Outlet Size 1 in Factory Set Pressure 150 psi Pressure Range 15 to 160 psi 5 044 000 BtuH Disc Material Brass ASTM B16 Overall Height 6 11/16 in Application Hot Water Heating Boilers and Hot Water Supply Systems Overall Length 4 in Seat Material Silicone Spring Material Plated Alloy Steel Temp Range 0 Degrees to 250 Degrees F Test Lever Yes Standards ASME Section IV CRN CSA