- Valves 250 Degrees F, Max.
4" Flanged Carbon Steel Wafer Check Valve Steam Pressure - Valves Not Rated, Seat Material Buna-N, Spring Material 316 Stainless Steel.Item - Check Valves Check Valve, Flow Design Single, Mechanism and Body Design Inline Wafer, Body Material - Valves Carbon Steel, Pipe or Tube Size 4 in, Connection Type Flange x Flange, Cracking Pressure 0. Water Pressure - Valves 285 psi @ 100 Degrees F, Max.184 psi, Mounting Orientation Horizontal, Vertical, Seal Material Buna-N, Max.