Triple Eccentric Flanged Butterfly Valve

Technical Requirement:
  1. Design & Manufacture: GB/T 12238 / JB/T 8527
  2. Face-to-Face: GB/T 12221
  3. End Flanges: GB/T 9124 / HG/T 20592
  4. Inspection & Test: GB/T 13927

Description

The Triple Eccentric Butterfly Valve with Body Flange is a metal-seated, high-performance butterfly valve. In addition to the two positional offsets, a third angular offset gives the seat a conical profile, so the disc only makes contact at the moment of closure. The result is friction-free operation, torque-seated bubble-tight shut-off and suitability for high temperatures and pressures where soft-seated valves cannot be used.

Technical Specifications:
  • Pressure Class: PN16 / PN25 / PN40
  • Size Range: DN100 – DN1500
  • Applicable Medium: Steam, hot water, oil, gas, air, weak corrosive media
  • Operating Temperature: -29°C to 425°C (material dependent)
Main Parts and Materials:
Parts NameMaterials
BodyCast Steel WCB / Stainless Steel CF8
DiscWCB / CF8
Seal RingMulti-layer SS + Graphite
Body SeatStainless Steel overlay / Stellite
Shaft / Packing2Cr13 / 17-4PH; Flexible Graphite
Key Product Features:
  1. Triple Offset Geometry: Cone-shaped sealing path eliminates rubbing between disc and seat.
  2. Metal-to-Metal Sealing: Laminated seal ring withstands heat, abrasion and fire.
  3. Bidirectional Shut-Off: Reliable sealing in both directions under pressure.
  4. Long Service Life: No elastomers to age or swell, ideal for high-temperature duty.
  5. Flexible Operation: Worm gear, electric or pneumatic actuation available.
Applications:

Ideal for Power Plants, Steel & Metallurgy, Petrochemical Plants, and District Heating. Specifically suited for steam, hot gas and high-temperature lines that require tight shut-off.

Additional information

Standard

GB