This series of pumps are single-stage, vertical, downdraft submersible sewage pumps, used to convey industrial wastewater and domestic sewage containing solid or long fibers such as sediment and feces. The pH value of the medium is 4-10, and the temperature does not exceed 60°C. The large flow channel anti-clogging design is adopted to greatly improve the dirt passing capacity. The pump has a compact structure, small size, easy movement and installation. There is no need to build a pump room and it can work when submerged in water to reduce the project cost. The design is reasonable, the matching motor is reasonable, the efficiency is high, and the energy saving effect is significant.