Triple-Eccentric Structure Advantages
- Superior Sealing Performance
The triple-eccentric design ensures that as the butterfly disc closes, its sealing surface transitions from line contact to full surface contact. This design compensates for deformations caused by temperature fluctuations, pressure variations, and mechanical stress, guaranteeing tight seals even under diverse operating conditions. Many models achieve zero leakage, meeting stringent standards like ANSI B16.104 Class VI. - Low Operating Torque
During opening and closing, the eccentric positioning of the disc relative to the sealing surface minimizes friction. This reduces the required operating torque significantly, enabling effortless manual or automated operation. Lower torque demands decrease the power requirements of actuators, extend the valve’s lifespan, and cut maintenance costs. - Enhanced Erosion and Cavitation Resistance
The triple-eccentric geometry streamlines fluid flow, minimizing turbulence and erosion on the sealing surface and disc. In high-pressure, high-velocity applications, this design protects critical components from cavitation damage, ensuring long-term reliability and stability.
Disc Design Advantages
- Lightweight Construction
Butterfly discs often feature truss-like or hollow designs, optimizing strength-to-weight ratios. This lightweight structure simplifies installation, transportation, and maintenance while reducing the load on pipeline supports. As a result, it cuts down on overall system construction costs. - Low Flow Resistance
The disc’s aerodynamic shape creates a smooth flow path, yielding a low flow coefficient (Cv value). Compared to other valve types, butterfly valves incur minimal pressure drops at the same flow rate, enhancing system efficiency and reducing energy consumption.