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Basic Info.

Model NO. :Double Eccentric Flanged Butterfly Valve

Work Pressure: Low Pressure (Pn<1.6mpa)

Working Temperature: Normal Temperature (-40¡ãC

Material of Seal Surface: Metal Hard Sealed

Valve Body: Casting

Standard: API609,Mss Sp-67,DIN3202,BS En558-1

Application: Industrial Usage, Water Industrial Usage

Disc: Di/CF8/CF8m

Stem: Ss420/F51

Transport Package: Plywood Case

Specification: DN100-DN3000/2"-36"

Origin: China

HS Code: 84818040

A Flange Double Eccentric Soft Seal Butterfly Valve is a type of industrial valve used to regulate, control, and isolate the flow of fluids in pipelines. It is called "double eccentric" because the axis of rotation for the disc is located outside the centerline of the valve body, providing advantages such as reduced friction and wear during operation.

Here are some key features and characteristics of a Flange Double Eccentric Soft Seal Butterfly Valve:

Flange Connection: The valve is designed with flanged ends, allowing it to be bolted directly to the pipeline or equipment using flange connections. Flanged connections provide a sturdy and secure attachment, ensuring a leak-free seal when properly installed.

Double Eccentric Design: The term "double eccentric" refers to the offset positioning of both the shaft and the centerline of the disc. As the valve opens, the disc's eccentric rotation allows it to lift away from the valve seat rapidly, reducing friction and wear between the sealing surface and the soft seat. This design also minimizes the operating torque required to open or close the valve, making it easier to operate.

Soft Seal: The butterfly valve is equipped with a soft sealing element that ensures tight shut-off when the valve is closed. The soft seal is typically made of materials like rubber (e.g., EPDM, Nitrile, etc.) or other elastomers. Soft seals provide an effective, bubble-tight closure, preventing any leakage when the valve is in the closed position.

Butterfly Disc: The valve's disc, also known as the "butterfly," is a circular plate mounted on the valve shaft, which pivots to control the flow of the fluid. When the valve is fully open, the disc is rotated perpendicular to the flow direction, allowing the fluid to flow freely. When the valve is closed, the disc is turned parallel to the flow direction, blocking the flow and providing a tight seal.

Actuation Options: Flange Double Eccentric Soft Seal Butterfly Valves can be operated manually using a hand lever or gear operator for smaller sizes. For larger sizes or when remote operation is required, they can be automated using electric, pneumatic, or hydraulic actuators. Automation allows for precise control and integration into process control systems.

Applications: These types of butterfly valves are commonly used in various industries, including water distribution systems, wastewater treatment plants, HVAC systems, chemical processing, power plants, and other industrial applications. Their soft sealing feature makes them suitable for applications requiring tight shut-off and bubble-tight sealing.

When selecting a Flange Double Eccentric Soft Seal Butterfly Valve for a specific application, it's important to consider factors such as the operating pressure, temperature, flow rate, and the compatibility of the soft sealing material with the fluid being handled. Consulting with valve experts or engineers can help ensure the right valve is chosen for the specific requirements of the system.