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How is Duckbill Check Valve working?

Duckbill check valves are unique, one-piece, elastomeric components that act as backflow prevention devices or one-way valves or check valves. They have elastomeric lips in the shape of a duckbill which prevent backflow and allow forward flow. The main advantage of duckbill valves over other types of one-way valves is that duckbill valves are self contained i.e. the critical sealing function is an integral part of the one piece elastomeric component as opposed to valves where a sealing element has to engage with a smooth seat surface to form a seal. Therefore duckbill valves are easily incorporated and assembled into a wide variety of devices without the hassle or problems associated with the surface finish quality of mating seats and/or complex assembly processes.




Other not less important features include:

  • (1)Position independent,
  • (2)Low opening pressure- immediate free flow,
  • (3)Non-tortuous flow path,
  • (4)High flow rate vs. package size,
  • (5)Virtually no internal volume and dead space,
  • (6)Particle compliant,
  • (7)Corrosion resistant,
  • (8)Wear resistant and
  • (9)last but not least very cost effective.


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