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DN2800 PN10 WCB Flanged Triple Eccentric Butterfly Valve

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DN2800 PN10 WCB Flanged Triple Eccentric Butterfly Valve is a high-performance large-bore triple eccentric flanged butterfly valve, engineered for industrial applications requiring high flow control and reliable sealing. Constructed from WCB carbon steel, the valve features outstanding strength and wear resistance, and is widely used in large-diameter pipeline systems for water treatment, power generation, metallurgy, municipal engineering and other industries. Its flanged connection guarantees stable installation and superior tightness. Equipped with electric or worm gear operating mechanisms, it supports on-site operation and remote control conveniently.
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DN2800 PN10 WCB Flanged Triple Eccentric Butterfly Valve


Structural Features

  • WCB Carbon Steel Material: The valve body is cast from WCB carbon steel with high strength and excellent pressure resistance, suitable for medium and low pressure large-bore working conditions.

  • Triple Eccentric Design: Adopting a three-dimensional eccentric structure (axial eccentricity, radial eccentricity and angular eccentricity), it enables friction-free opening and closing between the disc and seat, greatly extending the service life of sealing components.

  • Metal Hard Seal: The valve seat adopts a composite sealing structure of multi-layer stainless steel and graphite, featuring high temperature resistance and wear resistance. It works well under high temperature, high pressure and particle-containing medium conditions.

  • Flanged Connection: Designed with RF (Raised Face) flange complying with EN 1092-1 and GB/T 9113 standards, ensuring reliable installation and tightness for large-bore pipelines.

  • Bidirectional Sealing: The unique triple eccentric structure achieves bidirectional zero-leakage sealing, meeting ISO 5208 Rate A requirements.

  • Self-tightening Seal: The sealing performance improves with increasing medium pressure, featuring automatic sealing compensation capability.

  • Anti-blowout Stem: The valve stem is designed with anti-blowout structure to ensure operational safety.

  • Lightweight Structure: Compared with gate valves and globe valves of the same specification, it is lighter in weight and occupies less installation space, cutting the supporting cost of pipeline systems.


Technical Parameters

Parameter Item Specification

Size Range

DN50~

Pressure Class

PN10 (PN6/PN16/PN25 available for customization)

Temperature Range

-29℃ ~ +425℃

Valve Body Material

WCB (A216 Gr.WCB)

Valve Disc Material

WCB / CF8 / CF8M (Optional)

Valve Stem Material

2Cr13 / 304 / 316 (Optional)

Sealing Material

Multi-layer stainless steel & graphite composite / RPTFE / Metal hard seal

Connection Type

Raised Face (RF) Flange

Operation Mode

Electric (Electric actuator), Worm gear manual, Pneumatic

Design Standard

API 609 / EN 593 / GB/T 12238

Test Standard

API 598 / ISO 5208 / GB/T 13927

Face-to-Face Dimension

Compliant with API 609 / EN 558-1

Leakage Class

ISO 5208 Rate A (Zero Leakage)


Application Fields

  • Municipal Water Supply & Drainage: Applied to urban water supply and drainage pipe networks, sewage treatment plants and pump station systems, realizing reliable shut-off and regulation of high-flow media.

  • Power Industry: Used in cooling water systems and circulating water systems of thermal power plants and nuclear power plants to ensure efficient operation and safe isolation of the systems.

  • Metallurgy Industry: Suitable for blast furnace gas pipelines, hot air ducts and dust removal systems, capable of controlling high-temperature and dust-laden media.

  • Chemical Industry: Deployed in medium transmission and reaction systems of large-bore pipelines to prevent medium leakage and ensure production safety.

  • Pulp & Paper Industry: Applicable to pulp conveying pipelines and white water recovery systems, adapting to working conditions with fiber and particle-containing media.

  • HVAC: Installed in chilled water and hot water systems of central air conditioning in large buildings to maintain efficient system operation.

  • Hydraulic Engineering: Used for water transmission pipelines of reservoirs and water diversion projects to control and distribute large-volume water resources.


Advantages & Values

  • High Reliability for Large Bore: WCB carbon steel and triple eccentric structure ensure stable operation under large-bore, medium and low pressure conditions, reducing maintenance frequency and downtime.

  • Zero-leakage Sealing: Metal hard seal realizes bidirectional zero leakage, effectively lowering medium leakage risks and protecting personnel and environmental safety.

  • Low Operating Torque: Friction-free triple eccentric design greatly reduces opening and closing torque. Smaller actuators can be adopted to cut energy consumption and costs.

  • Easy Installation & Maintenance: Flanged connection simplifies installation of large-bore pipelines and facilitates on-line inspection and maintenance.

  • Wide Application Range: Diverse material options and wide temperature scope enable adaptation to various complex working conditions and medium characteristics.

  • Long Service Life & Low Comprehensive Cost: No friction and wear on sealing surfaces. Its service life is 3 to 5 times that of traditional concentric butterfly valves with lower overall maintenance cost.

  • Low Flow Resistance: Low flow coefficient and small pressure drop when fully open, delivering remarkable energy-saving effect and ideal for high-flow transmission systems.

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