QW series submersible sewage pumps are designed on the basis of absorbing advanced foreign and domestic technology. This kind of pump is composed of two parts: motor and pump. Motor and pump are separated from oil chamber and mechanical seal. Motor and pump are with same shaft. The pumps are of lower height, compact and equipped with several kinds of protection devices marking the pumps operating more safety and reliably. Application: Rain water and waste water in general. City construction engineering and construction field. Sewage water drainage of environmental protection engineering. Waste water drainage of residential area. Sewage water and sediment of water purification system. Heavy pastes and liquid in food and pharmaceutical processing industry. Waste water drainage for hospitals, hotels and restaurants etc. Waste water for leather industry and slaughterhouse. Beer and sugar industry. Textile industry. Drainage system for city sewage treatment industrial. Drainage system for u