Double Eccentric Butterfly Valve
Double Eccentric Butterfly Valve Introduction
Working Principle
The double eccentric design creates two offset axes between the valve stem and sealing surface. When opening, the disc separates from the seat immediately to reduce friction between sealing pairs; when closing, medium pressure and eccentric torque tightly press the seal to achieve reliable tight shut-off.
Key Advantages
- Long service life with less wear on sealing parts during operation;
- Wide pressure range from 0.6MPa to 4.0MPa for medium & high pressure pipelines;
- Two temperature options: -20℃~120℃ for soft seal, -60℃~425℃ for metal hard seal;
- Compact & lightweight structure, available in flanged, wafer and lug connection ends;
- Compatible with air, water, seawater, sewage, fuel gas, oil and other media.
Available Body Materials
Ductile iron, carbon steel, nickel-chromium alloy, stainless steel, duplex steel.
Actuator Types
Manual, pneumatic, electric, hydraulic control (can be equipped with counterweight for slow-closing check function).
Application Fields
Municipal water supply & drainage, power plant circulating water, oil & gas transmission, sewage treatment, chemical anti-corrosion pipelines, pump station outlet protection systems.
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