PN16/PN25/PN40 cast iron flange type swing check valve Body Material:Cast iorn 1. Size: DN40-350mm 2. Working Pressure: PN16/25/40 3. Material: Cast iron GG25 or Ductile iron GGG40 / 50 4. Suitable Temperature: -20 °C to 180 °C (Different temperature choose different materials) 5. Suitable Medium: Water, Steam, Oil and natural gas etc.( Different raw material for different medium) Cryogenic, soft seat insert design available for tight shut off where required. 1. Flange end, according to ANSI BS DIN JIS etc. 2. Face to Face: DIN 3202, EN 558-1 3. End Flange: DIN 2543-2545/DIN 2501 4. Inspection and Test: DIN 3230