Check Valve In Line Inlet (In.) 3/8 in (F)NPT Outlet (In.) 3/8 in (F)NPT Brass Hold Back Pressure (PSI) 400 psi Max Pressure (PSI) 450 psi Cracking Pressure (PSI) 0.1 psi Hex Size (In.) 13/16 in Flow Range Free Air (CFM) 0 to 12 cfm Max Temp (F) 400 Degrees F Vertical or Horizontal Mounting Tap Size - Length (In.) 2 1/8 in Stainless Steel Spring Material Disc Positive Seating Fluoropolymer for Maximum Air Flow PTFE Poppet Thread Coating - - Seal In-Line Check Valve