Safety Relief Valve Body Material Bronze Inlet Type FNPT Outlet Type FNPT Inlet Size 3/4 in Outlet Size 3/4 in Factory Set Pressure 75 psi Pressure Range 15 to 160 psi 1 686 000 BtuH Disc Material Brass ASTM B16 Overall Height 5 1/4 in Application Hot Water Heating Boilers and Hot Water Supply Systems Overall Length 3 3/16 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