Double Flanged Eccentric Disc Butterfly Valves

Codes & Standards

Design  : BS EN 593, API 609, AWWA C504

Testing   : API 598


  1. Low Torque Value: Once the disc comes out in offset there is no contact of seat & Disc which offers friction free movement.
  2. Less wear & Tear of lining & Seat because of less contact compared to concentric type.
  3. Ease of Replacing the seat: Only seal retainer ring to be un screwed & seat to be replaced.
SIZE RANGE CLASS RATING Connection Material of construction
50 - 600
PN 10 / PN 16
Double Flanged With Optional Rubber lining
  1. Cast Iron / Ductile Iron
  2. ASTM A 216 Gr. WCB
  3. ASTM A 351 GR. CF8/CF3, CF8M/CF3M