The QDXE and QXE series submersible electric pumps are equipped with internal protection devices. The motor is located at the top of the pump and is either a single-phase or three-phase asynchronous motor. The pump is located at the bottom and features a centrifugal impeller and volute structure. The dynamic seal between the water pump and motor employs a double-end mechanical seal. The static seals at each fixed stop use ‘O’-ring seals made of oil-resistant rubber. Due to their small size and light weight, this series of electric pumps are suitable for a wide range of applications, including well water pumping, farmland irrigation, garden watering, domestic water supply in rural areas, as well as drainage in industrial settings, construction water supply and drainage, and aquaculture.