Item – Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Wafer, Body Material – Valves Ductile Iron, Pipe or Tube Size 12 in, Connection Type Flange x Flange, Cracking Pressure 0.241 psi, Mounting Orientation Horizontal, Vertical, Seal Material Buna-N, Max. Temp. – Valves 250 Degrees F, Max. Water Pressure – Valves 250 psi @ 100 Degrees F, Max. Steam Pressure – Valves Not Rated, Seat Material Buna-N, Spring Material 316 Stainless Steel