Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Inline Swing Body Material - Valves Bronze Pipe or Tube Size 3/4 in Connection Type FNPT x FNPT Cracking Pressure 0.750 to 1.000 psi Mounting Orientation Horizontal Vertical Seal Material PTFE Max Temp - Valves 406 Degrees F Min Temp - Valves -20 Degrees F Max Water Pressure - Valves 300 psi @ 150 Degrees F Max Steam Pressure - Valves 150 psi WSP Seat Material Bronze Flow - Valves 18 gpm