The WQ304 all stainless steel national standard corrosion-resistant sewage pump (hereinafter referred to as the electric pump) consists of three parts: water pump, seal, and electric motor. The electric motor is located on the upper part of the electric pump. For three-phase asynchronous motors, fluorine rubber double end face machine seals are used between the water pump and the motor, and "O" -shaped fluorine rubber sealing rings are used for static sealing at each fixed stop.