Centrifugal stainless steel centrifugal pump centrifugal pump generally driven by the motor, before starting the pump, the pump and the suction pipe filled with liquid. When the impeller rotates at a high speed, the impeller drives the liquid between the blades to rotate together. Due to the centrifugal force, the liquid is thrown to the outer edge of the impeller from the center of the impeller (the flow rate can be increased to 15-25 m / s), and the kinetic energy also increases. When the liquid enters the pump housing, due to the gradual enlargement of the flow passage in the volute-shaped pump housing, the liquid flow rate gradually decreases and a portion of the kinetic energy is converted into static pressure energy. As a result, the liquid flows out at a higher pressure along the discharge outlet. At the same time, a certain vacuum is formed at the center of the impeller due to the liquid being thrown out, and the pressure Pa at the liquid level is higher than the center of the impeller. Therefore, the liquid in the suction line enters the pump under the pressure difference. Impeller rotation, the liquid is also continuously being inhaled and pressed out. As the reason why the centrifugal pump can transport liquid, mainly by the role of centrifugal force, it is called centrifugal pump. Many types of centrifugal pumps, classification methods are common in the following ways: 1 according to the impeller inhalation points: single suction centrifugal pump, double suction centrifugal pump. 2 according to the number of impeller points: single-stage centrifugal pump, multistage centrifugal pump. 3 according to the impeller structure points: Open impeller centrifugal pump, semi-open impeller centrifugal pump, closed impeller centrifugal pump. 4 according to the working pressure points: low pressure centrifugal pump, medium pressure centrifugal pump, high pressure centrifugal pump, vertical centrifugal pump.