Check Valve High Flow In-Line Inlet (In.) 1-1/2 in (F)NPT Outlet (In.) 1-1/2 in (F)NPT Brass Max Pressure (PSI) 500 psi Cracking Pressure (PSI) 1 psi Hex Size (In.) 2 1/8 in Flow Range Free Air (CFM) 90 cfm Max Temp (F) 450 Degrees F Horizontal or Vertical Mounting Tap Size 1-1/2 in Length (In.) 4 1/2 in Stainless Steel Spring Material 15 in Glass Filled PTFE Poppet Brass Seal Pneumatic Control