A centrifugal pump is a power device that sucks in and transports liquids by virtue of the centrifugal force generated by the high-speed rotation of the impeller. It features large flow, simple structure and stable operation, and can transport various media such as clean water, sewage and chemical liquids. It is widely used in the cooling system, fire-fighting system, ballast water system of ships, providing efficient liquid transportation guarantee for the normal operation of ships.