Double Eccentric Flange Butterfly Valve China Factory and Suppliers

Double Eccentric Flange Butterfly Valve China Factory and Suppliers

Leading China factory and suppliers of Double Eccentric Flange Butterfly Valves. Designed to EN 593 and BS 5155 standards with sizes up to 120 inches. Featuring EN 1092-2 and ASME B16.1 flange dimensions, ISO 5211 top flange, and API 598 testing for zero-leakage performance.



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The Double Eccentric Flange Butterfly Valve is a high-performance flow control solution engineered for demanding industrial environments. Designed in accordance with EN 593 and BS 5155 standards, this valve minimizes seat wear and friction through its unique double-offset geometry, ensuring a tight seal and extended operational life even under high-pressure conditions.

Available in sizes up to 120 inches, these valves are constructed from premium materials including ductile iron, stainless steel, and Al Bronze to resist corrosion and mechanical stress. Whether utilized in water treatment, chemical processing, or energy infrastructure, our Double Eccentric Butterfly Valves provide unmatched reliability, precise regulation, and efficient installation via standardized flange connections.

Detailed Parameters

Design StandardsEN 593 / BS 5155 Flange DimensionsEN 1092-2 / ASME B16.1
Top FlangeISO 5211 Face-to-FaceEN 558 / ISO 5752 / DIN 3202
Test & InspectionAPI 598 / EN12266 Maximum SizeUp to 120"
Body MaterialCast Iron / Ductile Iron Disc MaterialDuctile Iron / Al Bronze / Stainless Steel
Stem & PinStainless Steel Seat & BushingBronze / Stainless Steel / PTFE / Al Bronze

Key Advantages

Enhanced Durability

Utilizing high-grade Stainless Steel and Al Bronze components to ensure maximum resistance against wear and corrosion.

Reduced Maintenance

Double eccentric design reduces friction between the disc and seat, significantly extending service intervals.

Global Standard Compliance

Fully compliant with ISO, EN, and API standards for seamless integration into international piping systems.

Precision Sealing

Engineered for zero-leakage performance, ensuring optimal fluid containment in critical industrial applications.

Versatile Sizing

Wide range of available dimensions from DN100 up to 2000mm to meet diverse pipeline requirements.

Efficient Operation

Optimized torque requirements allow for easier manual or automated actuation without compromising power.

Product Gallery

Double Eccentric Flange Butterfly Valve China Factory and Suppliers
Double Eccentric Flange Butterfly Valve China Factory and Suppliers

Management Platforms

Inventory Control

Real-time tracking of valve stock levels and material specifications across multiple warehouses.

Quality Assurance

Rigorous API 598 and EN12266 testing protocols to ensure zero-defect delivery.

Order Monitoring

End-to-end visibility from the casting stage to final delivery and installation support.

Technical Support

Dedicated engineering team providing CAD drawings and installation guidance for all sizes.

Logistics Network

Global shipping capabilities ensuring timely arrival of oversized valves (up to 120").

Lifecycle Management

Systematic tracking of valve performance and maintenance schedules for long-term reliability.

Investment Return Comparison

Comparison MetricStandard Butterfly ValveDouble Eccentric Valve
Sealing LifeModerate WearExtended Lifecycle
Maintenance CostFrequent ReplacementLow Long-term Cost
Leakage RateStandard TightnessZero-Leakage Precision
Operation TorqueHigh FrictionOptimized Low Torque
ROI TimelineShort-term SavingsHigh Long-term Value

Frequently Asked Questions

Q: What is the difference between single and double eccentric butterfly valves?

Double eccentric valves have two offsets in the stem design, which allows the disc to leave the seat more quickly, reducing friction and wear, resulting in a longer seal life compared to single eccentric models.

Q: Which materials are best for corrosive environments?

For corrosive media, we recommend Stainless Steel or Al Bronze for the disc and stem, combined with PTFE bushings to ensure chemical resistance and durability.

Q: Do these valves comply with international flange standards?

Yes, our valves are manufactured to meet EN 1092-2 and ASME B16.1 flange dimensions, ensuring compatibility with global piping infrastructure.

Q: What is the maximum size available for the Double Eccentric Butterfly Valve?

We provide a wide range of sizes, with our maximum manufacturing capacity reaching up to 120 inches (DN3000).

Q: How is the valve tested before shipment?

Every valve undergoes rigorous inspection and testing in accordance with API 598 and EN12266 standards to guarantee leak-proof performance.

Q: Can these valves be automated with actuators?

Yes, since they are designed with ISO 5211 top flange dimensions, they are perfectly compatible with a wide variety of pneumatic and electric actuators.

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