The disc of the electric butterfly valve is installed in the diameter direction of the pipeline. In the butterfly valve body cylindrical channel, disc shaped disc around the axis of rotation, rotation Angle between 0°-90°, rotation to 90°, the valve is in full open state.

Butterfly valve structure is simple, small volume, light weight, only a few parts. Moreover, the valve can be opened and closed quickly by rotating only 90°, which is easy to operate. At the same time, the valve has good fluid control characteristics. When the butterfly valve is in the fully open position, the thickness of the butterfly plate is the resistance when the medium flows through the valve body, so the pressure drop generated by the valve is small, so it has better flow control characteristics. Butterfly valve has a bomb seal and metal seal two types of seal. Resilient sealing valve, sealing ring can be embedded in the body or attached to the disc around.

Electric butterfly valve with metal sealing valve is generally longer than the elastic sealing valve life, but it is difficult to achieve complete sealing. The metal seal can adapt to higher working temperature, while the elastic seal has the limitation of temperature. If butterfly valves are required to be used as flow control, it is important to select the correct size and type of valve. The structure principle of butterfly valve is especially suitable for making large-caliber valve.

Butterfly valve is not only widely used in petroleum, gas, chemical, water treatment and other general industries, but also used in thermal power plant cooling water system. Commonly used butterfly valve has two kinds of sandwich butterfly valve and flange butterfly valve. Double-headed butterfly valve is used to connect the valve between two pipe flanges, flange butterfly valve is the valve with a flange, with bolts to connect the valve on both ends of the flange in the pipe flange.