Eccentric Butterfly Valve – China Manufacturer & Supplier

Premium Quality Eccentric Butterfly Valves from China

As a professional China eccentric butterfly valve manufacturer, Yuanjd Valve specializes in the design, production, and supply of high-performance eccentric butterfly valves for demanding industrial applications. Our eccentric butterfly valves are engineered to deliver reliable flow control and shut-off performance in high-temperature, high-pressure, and critical service conditions where concentric butterfly valves simply cannot perform.

Unlike concentric (zero-offset) butterfly valves, where the stem runs directly through the center of the disc and the disc scrapes against the seat during operation, eccentric butterfly valves feature a shaft that is offset from the disc center and/or valve body center. These offsets reduce seat contact, minimize friction, and dramatically improve sealing performance and service life. Eccentric butterfly valves are available in double offset and triple offset configurations, each offering progressively greater performance capabilities for increasingly demanding applications.

Eccentric Butterfly Valve Types & Technical Advantages

Double Offset (Double Eccentric) Butterfly Valve

In a double offset butterfly valve, the shaft is offset from both the disc center and the valve body centerline. This design creates a cam-like motion that lifts the disc away from the seat immediately after opening begins, significantly reducing the 360-degree rubbing found in concentric designs. The result is reduced wear on sealing surfaces, improved flow characteristics, and enhanced performance at high pressures and temperatures.

Key specifications:

• Pressure Rating: Class 150–300

• Temperature Range: Up to 400°C with metal seat

• Seat Options: Resilient (EPDM, NBR, PTFE) or metal-seated

• Sizes: DN50 to DN600

Triple Offset (Triple Eccentric) Butterfly Valve

The triple offset butterfly valve adds a third offset—a conical (funnel-shaped) seating surface—to the double offset design. This sophisticated geometry ensures that the disc only contacts the seat at the final few degrees of closure. Through the entire operating range, the disc moves freely without touching the seat, achieving zero friction operation. Triple eccentric butterfly valves achieve metal-to-metal sealing with bubble-tight zero leakage performance, even in extreme conditions.

Key specifications:

• Pressure Rating: Class 150–900+ (up to 1500 in special designs)

• Temperature Range: Up to 815°C

• Seat: Metal (Stellite, Inconel, stainless steel)

• Sizes: DN80 to DN2400

• Leakage Class: API 598 Class VI (bubble-tight)

Applications & Industries

Eccentric butterfly valves are the preferred choice for critical industrial applications:

• Oil & Gas – upstream exploration, midstream pipeline transportation, downstream refining; handling crude oil, natural gas, gasoline, diesel

• Petrochemical & Chemical Processing – corrosive media handling, high-temperature process control

• Power Generation – high-temperature steam pipelines, cooling water systems, thermal power

• LNG & Cryogenic Services – extreme low-temperature applications

• Metallurgy & Steel – high-temperature gas services

• Water & Wastewater Treatment – industrial water systems, seawater handling

Design Standards & Quality Assurance

Our eccentric butterfly valves are manufactured in strict accordance with leading international standards:

• Design & Manufacture: API 609, MSS SP-68, EN 593, ISO 10631

• Face-to-Face Dimensions: API 609, EN 558 Series 20

• Flange Connections: ASME B16.5, EN 1092-1, JIS B2220

• Testing: API 598 (shell strength, high/low pressure sealing)

• Fire Safety: API 607 / API 6FA

• Fugitive Emissions: ISO 15848-1

Every valve undergoes rigorous pressure testing and inspection before leaving our factory, ensuring compliance with international quality requirements.

Why Choose Yuanjd Valve as Your China Eccentric Butterfly Valve Manufacturer?

At Yuanjd Valve, we combine decades of manufacturing expertise with advanced production facilities and rigorous quality control systems. As a leading China eccentric butterfly valve supplier, we are committed to delivering products that meet international quality standards while offering competitive factory-direct pricing.

China remains the global leader in eccentric butterfly valve production, thanks to its robust manufacturing infrastructure, skilled labor force, and well-established supply chains. Yuanjd Valve leverages this ecosystem to provide our global clients with high-quality products at competitive prices, backed by reliable delivery and responsive after-sales support.

Our eccentric butterfly valves feature:

• Blow-out proof stem design ensuring safety and reliability

• ISO 5211 top flange for direct mounting of actuators

• Bidirectional sealing capability

• Multiple material options including carbon steel, stainless steel (CF8, CF8M), and exotic alloys

• Customizable actuation – manual lever, gear operator, electric, pneumatic, or hydraulic

OEM & Customization Services

We offer comprehensive OEM and customization services, allowing you to specify materials, sizes, pressure ratings, actuation types, coatings, and certifications that precisely match your industrial requirements. Our engineering team can deliver tailored solutions for your specific project needs—whether you require double offset or triple offset configurations, wafer or lug or flanged ends, or specialized materials for corrosive or high-temperature services.

Contact Us

Partner with a reliable eccentric butterfly valve manufacturer in China. Contact Yuanjd Valve today for product inquiries, technical support, or to request a quote. Our experienced team is ready to assist you with professional guidance and prompt service.