Fine chemical industry is one of the dynamic emerging fields in the chemical industry today. It is an important part of new materials. Its industry fields include medicine, pesticides, dyes, coatings, pigments, reagents, adhesives, water treatment agents and catalysts, additives and other more than 40 industries and categories, can be said to be closely related to human life. Developing fine chemical industry has become the strategic focus of all countries to adjust the structure of chemical industry, improve the energy level of chemical industry and expand economic benefits. The development of fine chemical industry provides a guarantee for the development of high and new technologies such as biotechnology, information technology, new materials, new energy technology and environmental protection. At present, in the period of vigorous development of fine chemical industry, the requirements for control valves are becoming higher and higher, and the application conditions are becoming more and more complex, which is paid attention by the control valve manufacturers.