Flap check valves

The rubber flap check valve is applied to the horizontal pipeline or the vertical pipeline in which medium flow runs upwards. The backward flowing is effectively stopped. Rubber flap check valves could be widely used in water-supply and drain system.


  • Flap check valves keep medium pure, the disc is encapsulated with NBR/EPDM/FPM rubber
  • The rubber lining is reinforced with nylon fabrics to increase the operation life of the disc
  • The reasonable open limit and cavity space enable the obtaining of maximum area of flow section
  • The flow resistance of the flap check valve is comparably small and the valve parameter Cv is improved
  • The reliable open limit can improve the operation life of disc
  • Flap check vales are Fusion Bonded Epoxy (FBE) coated internally and externally.