Double-Eccentric Flanged Butterfly Valve

Frictionless Opening: The moment the valve opens, the disc rapidly disengages from the seat, completely eliminating friction wear on the sealing surfaces during operation. This significantly reduces operating torque, effectively extends the service life of the valve and seals, and reduces maintenance frequency.
Self-tightening seal during closure: Toward the end of the closing cycle, the disc utilizes the double-eccentric cam effect to progressively compress the seat, achieving an elastic seal that becomes tighter as the valve closes. This ensures stable and reliable sealing performance while requiring less closing torque and offering more convenient operation.

Zero-Leak Soft Sealing: Utilizing elastic rubbers such as EPDM and NBR for the valve seat, it achieves bidirectional sealing during closure (adapting to any flow direction). It meets zero-leakage standards at ambient temperatures, making it particularly suitable for systems with stringent sealing requirements, such as water supply, fire protection, and drainage.
Strong Adaptability to Operating Conditions: The rubber seal ring offers excellent adaptability, effectively compensating for minor pipeline misalignments and handling various complex operating conditions to enhance operational stability.

Effortless and Precise: The worm gear reduction mechanism ensures light and effortless operation, making it particularly suitable for large-diameter valves. The handwheel allows for precise adjustment of the butterfly disc to any opening angle, enabling accurate flow control to meet the demands of various operating conditions.
Highly expandable: Electric, pneumatic, or hydraulic actuators can be easily mounted on top of the worm gearbox, enabling remote control, automatic control, and intelligent management of the valve, and facilitating upgrades to automation systems.

When the valve is fully open, the thickness of the disc constitutes the flow resistance. With an extremely low flow resistance coefficient and high fluid throughput capacity, it serves as an effective on/off and regulating component for pipelines, effectively reducing system energy consumption while combining practicality with energy efficiency.

Compared to gate valves and globe valves of the same diameter, this butterfly valve features a shorter structural length and lighter weight, significantly saving installation space and material costs; The flanged connection design ensures convenient and efficient installation, disassembly, and maintenance, reducing overall operating costs.

The valve body is made of ductile iron, combining excellent strength and toughness. It offers superior corrosion resistance and impact resistance compared to gray iron, making it suitable for a wide range of media including water, seawater, wastewater, air, and oils. It offers high cost-effectiveness and a long service life.