WQ Series Submersible Sewage Pump

The WQ series is a submersible sewage centrifugal pump designed for waste, sewage, rainwater, clean water and corrosive media that carry solid particles. Published coverage is 8-10000 m³/h at heads of 6-60 m with motor power from 0.75 kW to 280 kW, and the pump can run submerged without a pump house. A special large-channel design raises the drainage capacity so the pump passes solid particles whose diameter is about 50% of the pump port size. The mechanical seal uses hard, corrosion-resistant titanium-tungsten material, which the supplier states allows continuous running beyond 8000 hours. A double-rail auto-coupling mounting system and an automatic control cabinet can be specified, so the pump can be lifted out for service without anyone entering the wet well.

The table lists the published WQ models with outlet size, capacity, head, speed, motor power and efficiency. Larger sizes extend the series up to 10000 m³/h and 280 kW.

• Sewage treatment plants: Moves raw sewage, sludge and return flows between process stages.
• Basements and civil defence: Drains basements, car parks and civil defence stations.
• Municipal engineering: Handles storm water and sewage in public drainage networks.
• Factories and hospitals: Empties process wastewater and sanitary drainage from buildings.
• Construction sites and mines: Dewaters pits carrying silt, stones and other debris.
• Farms and irrigation: Moves silty water for rural irrigation and drainage duties.

• Check the maximum particle size in the liquid against the published rule that solids may reach about 50% of the port diameter.
• Confirm the required head falls inside the 6-60 m range, and allow for the friction loss in a long discharge hose or pipe.
• Decide whether the installation needs the double-rail auto-coupling system, so the pump can be serviced without entering the wet well.
• Specify an automatic control cabinet if the pump has to run unattended with protection against leakage, overload and over-temperature.
• State whether the pumped liquid is corrosive, because corrosion resistance is a material selection matter rather than a standard feature.