Double Eccentric Butterfly Valve Manufacturer in Italy

Double eccentric butterfly valves are designed to reduce seat wear and operating friction during valve operation. As a Double Eccentric Butterfly Valve Manufacturer in Italy, ValvesOnly Europe produces valves where the disc is offset from both the shaft centerline and the seat, allowing it to disengage quickly from the sealing surface during opening. This design improves sealing performance and extends service life in high-cycle applications.

These valves are engineered for reliable shutoff and smooth operation in demanding industrial systems, with construction aligned to international standards for durability and long-term sealing performance.

Working Principle of Double Eccentric Butterfly Valve

Double eccentric butterfly valves operate using a disc that rotates around an offset shaft. The dual offset design ensures that the disc disengages from the seat immediately during opening, minimizing friction and reducing wear on sealing surfaces.

When closing, the disc gradually engages with the seat to create a tight seal, making the valve suitable for both isolation and moderate throttling applications.

Advantages of Double Eccentric Butterfly Valves in Industrial Applications

• Reduced friction between disc and seat during operation
• Extended service life due to minimized wear
• Lower operating torque compared to concentric designs
• Reliable sealing in medium to high-pressure systems
• Suitable for high-cycle and continuous operation

Double Eccentric Butterfly Valve Design Standards

• API 609 – Butterfly valve design
• EN 593 – Industrial butterfly valves
• ASME B16.34 – Valves flanged, threaded, and welding end
• EN 558 – Face-to-face dimensions
• ASME B16.5 – Flanged end dimensions

Inspection and Testing Standards for Double Eccentric Butterfly Valves

• API 598 – Valve inspection and testing
• ISO 5208 – Leakage testing
• EN 12266 – Pressure testing

Body and Trim Material Compatibility

Material selection depends on pressure rating, temperature conditions, and media characteristics, especially in applications requiring durability and corrosion resistance.

Industrial Applications of Double Eccentric Butterfly Valves

• Oil and Gas Processing – Flow isolation in pipeline systems
• Power Generation – Cooling water and utility systems
• Water and Wastewater – Distribution and treatment systems
• Marine and Offshore – Seawater handling applications
• Chemical Processing – Flow control in corrosive environments
• Steel and Heavy Industry – High-cycle flow control systems

Special Features and Customization Options

• Double offset disc design for reduced seat wear
• Low torque operation for easier actuation
• Custom end connections for system compatibility
• Options for manual, gearbox, and actuator operation
• Configurations for high-cycle and continuous service