PW (L)-type single-stage, single-suction, centrifugal water pump, the pump wetted parts made ??of ordinary gray cast iron. Shaft made of high quality carbon steel, supported by bearings, placed in bearing housing, with thin oil or grease lubrication. The pump has a reliable, smooth running, easy to plug, convenient maintenance. Below 80 ℃ for pumping with the fiber or other liquid suspension, for urban sewage exclude the use industrial and mining enterprises.