Item - Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Swing, Body Material - Valves Bronze, Pipe or Tube Size 1 in, Connection Type FNPT x FNPT, Cracking Pressure 0.750 to 1.000 psi, Mounting Orientation Horizontal, Vertical, Seal Material Bronze, Max. Temp. - Valves 406 Degrees F, Min. Temp. - Valves -20 Degrees F, Max. Water Pressure - Valves 200 psi @ 150 Degrees F, Max. Steam Pressure - Valves 125 psi WSP, Seat Material Brass, Flow - Valves 31 gpm