Double Eccentric Butterfly Valve

Overview:

The Double Eccentric Butterfly Valve, also known as a high-performance butterfly valve, is designed to provide enhanced sealing performance, durability, and reliability, especially in applications requiring a high degree of pressure control. This valve utilizes a double eccentric design, which reduces the friction between the valve disc and seat during operation, extending the valve’s service life and ensuring tight shutoff.

Product Features:

Double Eccentric Design:
- Offset Design: The valve features two offsets—one between the shaft and the center of the disc, and another between the shaft and the body centerline. This eccentricity ensures that the disc disengages from the seat quickly during opening, minimizing wear and reducing operating torque.
- Minimized Seat Contact: As the disc moves, it only contacts the seat during the final closing stages, which helps to reduce friction and extends the life of both the seat and disc.
Superior Sealing Performance:
- Tight Shutoff: The design ensures a reliable, bubble-tight seal, even under high-pressure conditions, making it suitable for critical applications.
- Soft or Metal Seat Options: Available with a soft seat (like PTFE) for lower-temperature applications or a metal seat for high-temperature or abrasive conditions, providing versatility for various environments.
Materials of Construction:
- Robust Body: The valve body can be made from various materials, such as carbon steel, stainless steel, or alloy steel, depending on the application’s requirements.
- Corrosion and Temperature Resistance: The use of durable materials, including stainless steel and high-alloy options, ensures excellent corrosion resistance and suitability for high-temperature applications.
Wide Range of Pressure and Temperature Ratings:
- High Pressure Capability: Designed for high-pressure applications, with pressure ratings typically ranging from Class 150 to Class 600 or higher.
- Temperature Tolerance: Suitable for temperatures ranging from cryogenic to high-temperature applications, depending on the materials used.
Low Operating Torque:
- Effortless Operation: The double eccentric design reduces friction and lowers the torque required to operate the valve, enabling easier manual operation or allowing smaller actuators to be used for automated control.
- Actuation Options: Can be equipped with manual, pneumatic, electric, or hydraulic actuators for flexible control options.
Versatile Flange Connections:
- Wafer, Lug, and Flanged Designs: Available in wafer, lug, and double-flanged configurations to accommodate different pipeline connection requirements.
Long Service Life:
- Reduced Wear and Tear: The double offset design minimizes seat wear, extending the valve’s operational life and reducing maintenance needs.
- Enhanced Durability: The valve’s robust construction and reliable sealing mechanisms ensure long-term performance, even in harsh environments.

Applications:

Oil & Gas Industry: Ideal for flow control in high-pressure pipelines, providing reliable sealing performance in both upstream and downstream processes.
Chemical and Petrochemical Plants: Suitable for handling corrosive or high-temperature fluids, ensuring durability and safety in aggressive media environments.
Power Generation: Commonly used in steam, water, and gas flow systems, including turbine bypass and control applications.
Water Treatment: Used in potable water, wastewater, and desalination plants where reliability and durability are crucial.
HVAC Systems: Provides efficient flow control for heating, ventilation, and air conditioning systems in commercial and industrial buildings.

Advantages:

Enhanced Sealing: Double eccentric design ensures a bubble-tight seal with minimal seat wear, extending the valve’s service life.
Lower Operating Torque: Reduces the required torque for operation, making it more energy-efficient and easier to automate.
Versatility in Application: Can be used in a wide range of pressure, temperature, and media conditions, offering flexibility for various industries.
Reduced Maintenance: The minimized friction and wear reduce the need for frequent maintenance, lowering operational costs.
Compact and Lightweight: Compared to traditional gate or globe valves, the butterfly valve offers a more compact and lightweight solution for similar functions.

Conclusion:

The Double Eccentric Butterfly Valve provides an advanced solution for industries requiring reliable flow control in high-pressure, high-temperature, or corrosive environments. With its superior sealing performance, reduced wear, and low operating torque, this valve offers both longevity and efficiency. It is an excellent choice for applications in oil and gas, chemical processing, water treatment, and HVAC systems.