Screw pump is an important equipment in our daily life and production, and has important equipment in industrial, agricultural, and urban construction. The development of pumps has a history of many years. With the development of society, there are more and more types of pumps, among which the pump valve is also one of the better developed ones. Nowadays, urban construction is also quite frequent, and the use of screw pumps is also quite common, especially corrosion-resistant pumps, which are widely used. Under the strong promotion of urban and rural construction by government departments, industrial enterprises and other industries continue to emerge, which has a certain impact on economic development and also determines the annual increase in demand for pumps. Corrosion resistant chemical pumps play an important role in urban construction and cannot be replaced. The production and development of corrosion-resistant pumps are getting better and better, and the transportation of corrosive media is increasing. There is a high demand for corrosion-resistant pumps. Although there have been many imported equipment imports, the equipment produced in China is also constantly improving. Now, the performance of our pump equipment is also getting better and better, which can be comparable to advanced pump valves abroad.