Safety Relief Valve Body Material 316 Stainless Steel Inlet Type MNPT Outlet Type FNPT Inlet Size 1/4 in Outlet Size 1/4 in Factory Set Pressure 100 psi Pressure Range 20 to 100 psi Overall Height 5/8 in Application Gas Overall Length 1 45/64 in Seat Material Viton Spring Material 316 Stainless Steel Temp Range -30 Degrees to 400 Degrees F Test Lever No Compliance ISO 9001 Standards CRN