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Replaceable & Bounded Seat Butterfly Valves

Butterfly

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Replaceable & Bounded Seat Butterfly Valves
BS EN 593API 609

Sizes 40mm–600mm, PN 2.5–16. Resilient seated, wafer & lugged ends.

Size Range40mm–600mm
Pressure RatingPN 2.5–16
Catalogue Models12 / 12L, 44 / 44L and 46 / 46L
Design StandardEN 593 and API 609 Category A
TestingEN 12266-1 and API 598
Body StylesWafer and lugged
ActuationHandle, gear, electric or pneumatic
CategoryButterfly

Key Features

Engineered for Performance

  • Replaceable elastomer seat
  • Hard phenolic seat backup on Model 12 / 12L
  • Collapsible, positively locked seat on Model 44 / 44L
  • Bonded rubber lining on Model 46 / 46L
  • Concentric bi-directional shutoff
  • Anti-blowout stem and positive hex drive
  • Low-torque, self-lubricating Delrin bearings
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Material Options

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.

Applications

Common Service Areas

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

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