Item - Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Piston, Body Material - Valves Carbon Steel, Pipe or Tube Size 3/4 in, Connection Type Socket x Socket, Cracking Pressure 8 psi, Mounting Orientation Horizontal, Seal Material 304 Stainless Steel, Graphite, Max. Temp. - Valves 800 Degrees F, Min. Temp. - Valves 0 Degrees F, Max. Water Pressure - Valves 2,000 psi @ 100 Degrees F, Max. Steam Pressure - Valves 800 psi WSP, Seat Material Stellite