Item - Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Spring Piston, Body Material - Valves 316 Stainless Steel, Pipe or Tube Size 3/4 in, Connection Type FNPT x FNPT, Cracking Pressure 0.435 psi, Mounting Orientation Vertical, Seal Material PTFE/PTFE+15 Percent Glass Fiber/PTFE+ 25 PercentCarbon/TFM1600, Max. Temp. - Valves 302 Degrees F, Min. Temp. - Valves -20 Degrees F, Max. Water Pressure - Valves 200 psi, Max. Steam Pressure - Valves 60 psi WSP