QW series chokeless submersible sewage draining pump is new type centrifugal pump produced according to 1995 national patent technology.Pump design has absorbed Sweden scientific impeller water power design， German reasonable whole structure and quickly installing technology， Japanese perfect protective e e equipment and advanced mechanical seal. It is high efficiency， power saving， operates reli-able.Performances，structure， installing dimension and technical requirements accord to China city and country construction industry standard， so it is widely used in draining water and draining sewage.

Our product has improved on original design technology， adpot advanced microcomputer technolo-gy， water level is autocontrolled， trouble map can show and be used more convenience， more suitable for several pumps auto management and no person watching.