Pressure Relief Valve Valve Inlet Port 3/8 in NPT Preset Setting (PSI) 0 to 20 Valve Vacuum Range Not Rated Max CFM - Valves 2 cfm Max Temp 250 Degrees F Operational Pressure Range 0 to 20 psi Brass Body Material Stainless Steel Poppet Brass Seal Material Stainless Steel Spring Material Hex (In.) 11/16 in Length (In.) 1 3/4 in Pressure Relief Rated CFM @ Set Pressure 5 cfm Vacuum / Pressure Relief Valve