D4547 Adjustable Relief Valve Body Material Bronze Inlet Type MNPT Outlet Type FNPT Inlet Size 1/2 in Outlet Size 1/2 in Factory Set Pressure 75 psi Pressure Range 51 to 75 psi Disc Material Bronze Overall Height 5 7/8 in Application Liquids Seat Material Bronze Spring Material 316 Stainless Steel Temp Range 0 Degrees to 450 Degrees F Test Lever No