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Triple Eccentric Metal Seated Butterfly Valve - High-Quality China Suppliers and Factory Solutions

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The three eccentric butterfly valve operates on a distinctive structural design that effectively combines sealing and flow control capabilities. This innovative valve features a three eccentric structure where the valve stem axis is intentionally positioned away from the center of both the butterfly plate and the valve body. Additionally, the rotation axis of the valve seat is angled relative to the valve body channel’s axis. This design allows the butterfly plate to create a wedge-shaped space with the valve seat when in the closed position, achieving an efficient seal through friction. Conical Sealing Surface: The butterfly plate's periphery is crafted into an external inclined conical surface, which aligns with an internal inclined conical surface on the valve seat, resulting in an elliptical contact area. When closed, the asymmetric pressing force on the butterfly plate ensures a robust seal, with tighter sealing achieved as the pressure increases. As a leading China supplier and factory of high-quality valves, we ensure that our three eccentric butterfly valves meet rigorous performance standards.

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    Features & Benefits

    • Unique, compact, and lightweight design with flexible and labor-saving operation;
    • Provides reliable sealing that meets various standards;
    • Offers good flow characteristics and has a regulating function;
    • Utilizes an eccentric design to minimize wear on the sealing surface, extending the valve's lifespan;
    • Suitable for a wide range of applications, including water, steam, oil, and gas;
    • Applicable across various conditions including different temperatures, pressures, and corrosive environments;
    • Features a triple eccentric hard-sealed butterfly valve with an integral body and seat, the seat's sealing surface is coated with temperature and corrosion-resistant materials;
    • Three eccentricities position the shaft and sealing surfaces to optimize sealing and reduce wear;
    • Equipped with multi-layer sealing rings on the valve plate, enhancing sealing performance and operational ease, suitable for both high and low temperatures, ensuring zero leakage.

    Product Description

    Working Mechanism

    Open State: The butterfly plate is separated from the valve seat, and the fluid passes through the channel; due to the eccentric design, during the opening process, the butterfly plate gradually detaches from the valve seat, reducing friction and operating torque.

    Closed State: The butterfly plate rotates 90° to contact the valve seat, forming a wedge-shaped space and achieving sealing through torque.

    Flow Regulation: During the opening rotation of the butterfly plate, the valve's flow area gradually increases, reducing fluid resistance and improving the flow coefficient, achieving flow regulation.

    Technical Advantages

    Sealing Performance: The metal-to-metal hard sealing method can still maintain good sealing performance in high-temperature and high-pressure environments.

    Low Friction Operation: The eccentric design significantly reduces the operating torque and extends the valve's lifespan.

    Self-Locking Function: When closed, the butterfly plate becomes tighter under pressure, preventing the phenomenon of over-positioning.

    This valve is widely used in the petroleum, chemical, and power industries, and common structural connection forms include double flange type, welding type, lug type, and socket type, etc.

    Product Display

    Frequently Asked Questions (FAQ)

    1. What is the working mechanism of a triple eccentric butterfly valve?
    During the opening process, the eccentric design allows the butterfly plate to gradually detach from the seat, reducing friction. In the closed state, it rotates 90° to contact the seat and achieve sealing through torque. It also allows for flow regulation by adjusting the flow area.
    2. Can this butterfly valve be used in high-temperature environments?
    Yes, it features a metal-to-metal hard sealing method and multi-layer sealing rings that ensure reliable sealing performance and zero leakage in both high-temperature and high-pressure environments.
    3. How does the eccentric design benefit the valve?
    The triple eccentric design positions the shaft and sealing surfaces to minimize wear on the seating surface. This significantly reduces operating torque, optimizes sealing, and extends the overall lifespan of the valve.
    4. What industries commonly use this type of valve?
    This valve is highly versatile and is widely used across the petroleum, chemical, and power industries for handling water, steam, oil, and gas applications.
    5. What structural connection forms are available?
    Common structural connection forms for this valve include the double flange type, welding type, lug type, and socket type, allowing for flexible installation across various piping systems.