Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Inline Swing Body Material - Valves Carbon Steel Pipe or Tube Size 12 in Connection Type Flange x Flange Cracking Pressure 0.065 psi Mounting Orientation Horizontal Seal Material 316 Stainless Steel Max Temp - Valves 800 Degrees F Min Temp - Valves -20 Degrees F Max Water Pressure - Valves 740 psi @ 100 Degrees F Max Steam Pressure - Valves 410 psi WSP Seat Material Carbon Steel