Item - Check Valves Check Valve Flow Design Single Mechanism and Body Design Inline Swing Flex Body Material - Valves Cast Iron Pipe or Tube Size 12 in Connection Type Flange x Flange Cracking Pressure 0.25 psi Mounting Orientation Horizontal Vertical Seal Material Metal Max Temp - Valves 200 Degrees F Min Temp - Valves 33 Degrees F Max Water Pressure - Valves 250 psi Max Steam Pressure - Valves Not Rated Seat Material Buna-N Flow - Valves 4 000 gpm Full Flow - Valves No