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Centreline Butterfly Valves

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Centreline Butterfly Valves
API 609EN 593ASME B16.34

Sizes 50mm–1000mm (2"–40"), PN 6–16. Centreline design with replaceable or bonded seat. Wafer & lugged ends.

Size Range50mm–1000mm
Pressure RatingPN 6–16
Catalogue Models12 / 12L, 44 / 44L and 46 / 46L
Design StandardEN 593 and API 609 Category A
TestingEN 12266-1 and API 598
Flow DirectionBi-directional
OperationHandle, gear, electric or pneumatic actuation
Production Capacity36,000 units/year
CategoryButterfly

Engineered for Performance

  • Concentric bi-directional shutoff
  • Replaceable or bonded elastomer seat
  • Wafer and lugged body styles
  • Anti-blowout stem design
  • Positive hex drive between stem and disc
  • Self-lubricating Delrin bearings
  • Low-torque cosine sealing profile
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Need custom specifications? Our engineering team can help you find the right solution.

Typical Materials of Construction

BodyCast iron, ductile iron or ASTM A216 WCB carbon steel
DiscDuctile iron; CA15, CF8 or CF8M stainless steel; WCB with hard-rubber lining
SeatNitrile, Neoprene, EPDM, Butyl, Viton or Silicone
StemASTM A276 Type 410, 304 or 316 stainless steel
Stem bearingSelf-lubricating Delrin

Final material selection depends on pressure, temperature, media and service conditions.

Common Service Areas

  • Water
  • Sea water & brine
  • Air
  • Weak acids & alkalis
  • Effluents
  • Oils

Your Flow Challenge Deserves More Than a Catalogue.

Our engineering team works with you to specify, design, and deliver the exact valve solution your application demands.