Difference between Dual Plate Check Valve & Swing Check Valve

Dual Plate check valve
  • Light Weight thus easier handling and self supporting.
  • More compact & structurally sound design.
  • Only check valve witch can be installed for flow upside down due to spring assisted closer.
  • Low pressure drop and reduced energy loss irrespective of pressure ratings. Streamlined flow way.
  • Efficient and positive sealing under most flow pressure conditions. Valve closes before flow reversal at zero velocity.
  • Inherently Non-Slamming. No external devices / attachments required. Water-hammer almost non-existent. Long life and trouble-free operation
Swing check valve
  • Bulky & voluminous thus cumbersome handling & heavier supporting system.
  • Large & difficult to analyze from stress concentration points in critical applications due to intricate body shape.
  • Suitable primarily for horizontal applications.
  • Not possible.
  • Significant Pleasure Loss and Energy Loss, which is still higher at higher pressure ratings. Swing restricted flow path.
  • Always require reverse flow for closer and back pressure for effective sealing.
  • External attachment required to counteract slamming.
  • Water-hammer tendency persists.
  • Seat & Hinge Pin require regular maintenance due to impact loads and wear by rubbing