D4553 Adjustable Relief Valve Body Material Bronze Inlet Type MNPT Outlet Type FNPT Inlet Size 2 in Outlet Size 2 in Factory Set Pressure 300 psi Pressure Range 251 to 300 psi Disc Material Bronze Overall Height 11 1/8 in Application Liquids Seat Material Bronze Spring Material 316 Stainless Steel Temp Range 0 Degrees to 450 Degrees F Test Lever No