Bi-Directional Valves/Seals

Medical - Bi-Directional Valves

Bi-Directional Valves / Seals

  • Dome shaped all-rubber valves open more easily in one direction than the other
  • Slit at top of dome opens more easily when pressure is applied on the dome inside 
  • Opening in the reverse direction (pressure outside dome) requires buckling
  • Can be engineered with two specific opening pressures based on shape/thickness
  • Flow is always more restricted than with duckbill and umbrella valves
  • Valve is mounted by the flange the same way a duckbill is mounted
  • Often used not as a valve but rather as a catheter seal (seals around a probe / pipe)