The motor of WQ type submersible sewage pump is mounted on the upper part of the pump unit, which can be single-phase or three-phase asynchronous motor. The pump assembly is located below the motor. A double mechanical seal is adopted for the dynamic seal between the pump and motor. O-rings made of oil-resistant rubber are used as static seals at all fixed spigot joints.This series of submersible pumps is widely used in industry, agriculture, mining, civil engineering, municipal environmental protection and other fields. It is an ideal equipment for pumping mud, mortar, domestic wastewater, sewage and manure, as well as media containing solid particles such as short fibers, paper scraps and sediment. It is also suitable for rural irrigation and drainage, river and pond silt cleaning.