With the development of the pesticide pharmaceutical industry, in the pesticide pharmaceutical production process, the requirements for cleaning, sterilization and sealing of reaction equipment are becoming more stringent. Therefore, the valve used in the working condition is often required to achieve zero leakage to avoid contamination of the drug during the production process. The whole operation space has no irritating odor and no smoke, which puts forward strict requirements for the valve manufacturing industry. At the same time, under the development trend of the pesticide industry, all kinds of valves will be more widely used in the pesticide pharmaceutical industry.