Item - Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Y Spring Piston, Body Material - Valves 316 Stainless Steel, Pipe or Tube Size 1 1/2 in, Connection Type FNPT x FNPT, Cracking Pressure 0.435 psi, Mounting Orientation Horizontal, Vertical, 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 800 psi, Max. Steam Pressure - Valves 130 psi WSP