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TRI-CON Triple-Offset Butterfly Valve
·Butterfly Valve

TRI-CON Triple-Offset Butterfly Valve

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Zwick TRI-CON is a metal-seated triple-offset butterfly valve whose unique third 25° offset eliminates friction between the laminated seal ring and body seat. The resulting camming action lets the stainless-and-graphite laminated seal ring close into an inclined body seat in true cone-in-cone geometry, delivering reliable zero-leakage performance across demanding applications.

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Key Benefits
  • 01True cone-in-cone seating with a 25° inclined third offset for zero-leakage performance
  • 02Self-centering disc keyed (not pinned) to the shaft — tolerates 1000× the thermal differential of competitors
  • 03Widest laminated seal ring on the market — forgiving against line scale and particulates
  • 04Trunnion-mounted bearings close to the disc centerline eliminate shaft deflection
  • 05TA Luft fugitive-emission compliant with standard five-ring graphite packing
Technical Features
  • 01Triple-offset conical seating with 25° inclined seat and seal ring
  • 02Stainless and graphite laminated seal ring with all-metal lamination option for aggressive media
  • 03Self-centering disc keyed to the shaft (not pinned), accommodating thermal expansion
  • 04Standard five-ring graphite packing meets TA Luft fugitive-emission requirements
  • 05Patented sealed bearing option for zero-to-low-ppm stem packing emissions
  • 06Graphite bearing protector ring prevents particulate migration
  • 07Sizes 2" to 72" (DN 50 to 900)
  • 08Pressure classes ASME 150 – 1500 lb (or PN 10 – 40 DIN)
  • 09Body styles: Lug A1 (API 609), Double Flanged I1 (ISO 5752), Buttweld S1/S2, Gate Valve B1 (ASME B16.10)
  • 10Design per ASME B16.34 and API 609
  • 11Flange drilling to ASME B16.5 (2"–24") and B16.47 Series A & B
  • 12Testing: API 598 Zero Leakage standard, API 6D Zero Leakage optional
  • 13API 607 4th edition fire test certified
  • 14BAM approval for oxygen service
  • 15CE per 97/23/EG Pressure Equipment Directive, ISO 15848-1, ISO 9001
  • 16Body materials: ASTM A216 WCB carbon steel or ASTM A351 CF8M stainless steel
Applications
  • High-performance isolation in chemical, oil and gas, and petrochemical services
  • Oxygen service (BAM approved)
  • Steam and hot-water isolation
  • Fugitive-emissions-critical duties (TA Luft compliant)
  • Cryogenic and high-temperature process service
  • Fire-safe applications (API 607 certified)
  • Severe media with particulates or line scale
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