Sep. 21, 2023
The double eccentric butterfly valve is a high-performance type of butterfly valve designed for precise flow control in demanding applications. It features a unique double eccentric design that provides enhanced sealing and durability. This valve is widely used in industries where reliable shut-off, low leakage, and efficient flow regulation are required.
Double Eccentric Design: The valve's disc is mounted off-center from the shaft and seat, creating a double eccentric configuration. This design allows the disc to move away from the seat in a cam-like motion during the opening and closing process, minimizing friction and wear. It provides a tight seal against the seat, reducing the potential for leakage.
High Performance: The double eccentric butterfly valve is engineered for high-performance applications. Its design enables precise control over the flow rate, allowing for accurate throttling and modulation. The reduced friction and wear enhance the valve's longevity, ensuring reliable operation over an extended service life.
Sealing Capability: The double eccentric design significantly improves the valve's sealing capabilities. As the disc moves away from the seat during opening, it reduces the frictional forces between the disc and the seat. This feature enhances sealing performance and reduces the risk of seat deformation, leading to better shut-off capabilities and reduced leakage rates.
Bi-Directional Sealing: The double eccentric butterfly valve offers bi-directional sealing, meaning it can effectively seal in both flow directions. This feature allows for installation flexibility and eliminates concerns about flow direction during system operation.
High-Temperature and High-Pressure Applications: The double eccentric butterfly valve is suitable for demanding environments, including high-temperature and high-pressure applications. It can handle a wide range of fluids, such as gases, liquids, and slurries, making it versatile across various industries.
Actuation Options: These valves can be operated manually or automated with electric, pneumatic, or hydraulic actuators. Automation enables remote control, integration into control systems, and facilitates precise positioning for flow control.
Materials of Construction: Double eccentric butterfly valves are available in a variety of materials to suit different operating conditions and media. Common materials include carbon steel, stainless steel, ductile iron, and special alloys. The choice of materials ensures corrosion resistance, mechanical strength, and compatibility with specific fluids.
Oil and Gas Industry: Double eccentric butterfly valves are commonly used in oil and gas production, refining, and distribution systems, where they provide reliable shut-off and control for various fluids and gases.
Chemical and Petrochemical Plants: These valves are well-suited for chemical processing and petrochemical applications, including flow control of corrosive chemicals and aggressive media.
Power Generation: Double eccentric butterfly valves find application in power plants for controlling the flow of steam, condensate, cooling water, and other fluids in boiler systems, cooling towers, and heat exchangers.
Water and Wastewater: They are utilized in water treatment plants, sewage systems, and irrigation networks for flow control and isolation.
HVAC Systems: Double eccentric butterfly valves are employed in heating, ventilation, and air conditioning systems for regulating the flow of air and water.
In summary, the double eccentric butterfly valve offers enhanced sealing, precise flow control, and durability for demanding applications. Its double eccentric design and sealing capabilities make it suitable for a wide range of industries, including oil and gas, chemical, power generation, and water treatment.