Stainless steel pumps are mainly composed of a pump body, a pump cover, an impeller and a shaft seal. The pump body is usually processed by precision casting, and the impeller is usually made of stainless steel or cast iron. The pump cover is usually made of stainless steel or cast iron. The shaft seal is usually a mechanical seal, and it can also be a stuffing box seal. The stainless steel pump has the characteristics of compact structure, beautiful appearance, convenient operation and maintenance, strong corrosion resistance, strong chemical stability, and good hygienic performance.