WQ non-blocking sewage submersible electric pump is a new generation of pump products successfully developed based on the introduction of foreign advanced technology and combined with the use characteristics of domestic water pumps, which has significant energy-saving effects. The unique impeller structure and new mechanical seal can effectively convey media containing solids and long fibres. Compared with the traditional impeller, the pump impeller adopts the form of single or double runner, which is similar to a bend of the same cross-section size, with very good overflow and a reasonable worm chamber, so that the pump has high efficiency. The impeller has been tested for dynamic and static balance, ensuring that the pump experiences no vibration in operation. The hydraulic performance of the pump is advanced and mature, and the product has been tested to meet the relevant standards; it has been welcomed and praised by the majority of users for its unique efficacy, reliable performance, and stable quality after being put on the market.