Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Inline Spring Body Material - Valves Bronze Pipe or Tube Size 1 1/2 in Connection Type FNPT x FNPT Cracking Pressure 0.750 to 1.000 psi Mounting Orientation Horizontal Seal Material Bronze Max Temp - Valves 353 Degrees F Min Temp - Valves -20 Degrees F Max Water Pressure - Valves 250 psi @ 150 Degrees F Max Steam Pressure - Valves Not Rated Seat Material Bronze Spring Material Bronze