Second, maintenance precautions For many industrial fields, the normal use of pneumatic switch butterfly valve is the primary condition to ensure the industrial process flow, which shows that routine maintenance is a very important and indispensable step and item. 　　　　

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.