At the beginning of the founding of the People's Republic of China, China was based on industry and agriculture. The Northeast Industrial Belt, Shanghai Iron and Steel, etc., led China's industry to flourish. In the 21st century, the Internet is booming, and various network companies have sprung up like mushrooms. However, after the Internet boom and pains, in recent years, the manufacturing industry and industry have regained the attention of the government and the people. As an important execution unit instrument in the industrial automation process control, the electric control valve plays an increasingly important role in the national economy as the industry warms up again. 　　　　

Analysis of relevant information What problems will be encountered in the application and use of pneumatic butterfly valves Analysis of the causes and solutions of internal leakage of electric control valves Analysis of the principles to be followed in the installation of pneumatic control valves Introduction of several troubleshooting methods for electric butterfly valves Introduction of the daily use of some pneumatic butterfly valves