Double Eccentric Butterfly Valve

The double eccentric butterfly valve, also known as the high-performance butterfly valve, features a double offset design in which the valve shaft is offset from both the centerline of the valve body and the sealing face. This cam-like closing action minimizes rubbing between the disc and the seat during opening and closing, resulting in lower operating torque, reduced wear and reliable bidirectional sealing. Thanks to its simple and compact structure, the valve is easy to operate and simple to maintain, with a small opening and closing torque. The valve is widely used in municipal water supply and drainage, HVAC, power plant cooling systems, petrochemical, shipbuilding and food industries, providing strong support for the operation of modern industry.

double offset

double offset

double offset

Double eccentric butterfly valve is a popular industrial valve with many advantages.

First, the double eccentric structure keeps the disc out of contact with the seat until the final closing position, which provides good sealing performance, effectively prevents leakage and fluid loss, and greatly extends the service life of the seat.

Secondly, the opening and closing torque is small, making the valve easy to operate and simple to maintain. Third, with resilient (PTFE/EPDM) or metal seat options, it is suitable for water, seawater, oil, gas, steam and mildly corrosive media. Finally, due to its wide range of applications, the double eccentric butterfly valve provides strong support for the operation of modern industry. For severe working conditions such as pressure class above ANSI 600 or temperature above 425°C, the triple offset metal-to-metal butterfly valve is recommended.

Keywords:

double eccentric structure

sealing performance

small opening and closing force

easy operation

strong adaptability

wide application

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