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OS&Y Gate Valves Successfully Shipped in 20ft Container to Thailand

7 views Source: LUOYANG VALFLO VALVE CO., LTD.

The key differences between ‌concentric‌ and ‌triple eccentric butterfly valves‌ are as follows:

  1. ‌Stem and Disc Alignment‌

    • ‌Concentric‌: The valve stem, disc, and body centers are aligned in the same position. This design is simple and cost-effective, commonly used in rubber-lined valves‌.
    • ‌Triple eccentric‌: The stem is offset three times (eccentricity in shaft, disc, and seat planes), reducing friction and wear, making it suitable for high-pressure and high-temperature applications‌.
  2. ‌Sealing Mechanism‌

    • ‌Concentric‌: Relies on soft seating (e.g., rubber) for tight closure, prone to wear over time‌.
    • ‌Triple eccentric‌: Uses a metal-to-metal seal with wedging action, ensuring long-term durability and zero leakage‌.
  3. ‌Performance‌

    • ‌Concentric‌: Best for low-pressure, moderate-temperature systems (e.g., water treatment)‌.
    • ‌Triple eccentric‌: Ideal for demanding conditions like steam, oil, and corrosive media due to its superior sealing and torque efficiency‌.
  4. ‌Application Scope‌

    • ‌Concentric‌: Limited to throttling and basic isolation tasks‌.

    • ‌Triple eccentric‌: Used in critical processes requiring tight sealing and minimal maintenance‌.

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