Item – Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Disc, Body Material – Valves 316 Stainless Steel, Pipe or Tube Size 1/2 in, Connection Type FNPT x FNPT, Cracking Pressure 0.363 psi, Mounting Orientation Horizontal, Seal Material PTFE/PTFE+15 Percent Glass Fiber/PTFE+ 25 PercentCarbon/TFM1600, Max. Temp. – Valves 356 Degrees F, Min. Temp. – Valves -20 Degrees F, Max. Water Pressure – Valves 200 psi, Max. Steam Pressure – Valves 130 psi WSP, Seat Material PTFE