D4559 Adjustable Relief Valve Body Material Bronze Inlet Type FNPT Outlet Type FNPT Inlet Size 2 in Outlet Size 2 in Factory Set Pressure 50 psi Pressure Range 0 to 50 psi Disc Material Bronze Overall Height 11 1/8 in Application Liquids Seat Material 316 Stainless Steel Spring Material 316 Stainless Steel Temp Range 0 Degrees to 450 Degrees F Test Lever No