The electric butterfly valve belongs to one of the electric valves and electric regulating valves. The main connection modes are flange type and wafer type. It is an important execution unit in the field of industrial automation control. Butterfly valves can be divided into offset plate type, vertical plate type, inclined plate type and lever type according to the structure. According to the sealing form, it can be divided into soft seal. Type and hard seal type. The soft seal type generally adopts rubber ring seal, and the hard seal type usually adopts metal ring seal. According to the connection type, it can be divided into flange connection and wafer connection; According to the transmission mode, it can be divided into manual, gear transmission, pneumatic, hydraulic and electric. It is usually composed of angle travel electric actuator (0~90 ° partial rotation) and butterfly valve through mechanical connection, installation and commissioning.

The structure principle and purpose of the electric switch butterfly valve is usually divided into two parts, one is the angle travel electric actuator, the other is the butterfly valve. The two parts are mechanically connected, and then the electric switch butterfly valve is formed after installation and commissioning. He is directly connected to the power supply and completes the switch action through the positive and negative directions of the switch. Electric switch butterfly valve is mainly used to control the temperature, pressure and flow of various industrial automation production pipelines. For example, it is used for the management of power, petrochemical and environmental protection, as well as fire protection, etc.