PWF stainless steel sewage pump is a single-stage, single-suction, cantilevered centrifugal water pump. Pump suction for axial horizontal direction, pump discharge can be pretended to be horizontal or vertical direction according to need. Mainly by the pump cover, pump casing, impeller, shaft seal, shaft, and the bracket etc. Shaft seal USES the double mechanical seal structure of the novel form, the pump and motor installed in a common chassis, directly driven by a motor through flexible coupling. The pump has high efficiency, energy saving significantly, smooth operation, reliable performance, easy maintenance, etc.