Inline Duckbill Check Valves

Rhinoflex - Series Rfin - Flanged Inline Type

Inline Duckbill Check Valves

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Inline Duckbill Check Valves

The Rhinoflex Series RFIN-INLINE Duckbill check valve is a one way non return valve that are designed and engineered with a built-in flange that are part of the one piece elastomeric valve. This model is suitable when there is a requirement that prevents backflow, inside a pipe line.

This enables the valve to be mounted in between two mating pipe flanges, using the flanges to secure the valve flange between them, there by having the duckbill valve inside the pipe.

These are custom made from a variety of elastomeric rubbers, and built as per the application and the line pressure and back pressure concerned. They are available in all standard pipe sizes, and typical application is back flow prevention downstream of a pump.

With these duckbill check valves, there are no flaps or gates, seats or seals, springs or hinges that are mechanical and will rust, corrode, fall off or malfunction. The duckbill gives reliable, repeatable service for many years, and requires no additional power source to operate the valve.

Please note: Using this model, the valve is inserted INSIDE the pipe, so the diameter of the valve will be smaller than the pipe diameter, thereby compromising the flow hydraulics. Keep this in mind, when designing / choosing this model valve.

  • Full rubber construction, totally wear resistant to abrasives
  • No water hammer and noise, prevents back flow
  • No energy costs, actuation or maintenance
  • Valve will not deform or freeze
  • Easily exchangeable with other check valves
  • Designed to suit all diameters and pressure ratings


  • Sewer Interceptors
  • Wet Wells
  • Mine Tailing Systems
  • Dredging
  • Scrubber Systems
  • Outfall Lines
  • Wet/Dry Wells