In municipal engineering, wastewater treatment, industrial drainage, and construction site applications, conveying highly polluted wastewater with solid particles and long-fiber impurities has long been challenging for pumping systems. System downtime caused by pipeline clogging, entanglement, or frequent overload not only increases operational and maintenance costs but also seriously affects engineering safety.

The QW and WQ series non-clogging submersible sewage pumps are new-generation products developed by introducing advanced foreign technology and integrating domestic water-use characteristics. This series features a unique single/double-runner impeller structure and a new double-end tandem mechanical seal, delivering remarkable energy savings, anti-winding and non-clogging operation, automatic installation, and automatic control. It shows outstanding performance in discharging solid grains and long-fiber refuse, earning widespread praise and recognition from users since its market launch.

WTY Conclusion: The QW and WQ series fully inherits the advantages of mechatronic submersible construction, significantly reducing civil engineering investments for upper pump houses. WTY provides both mobile free-standing installation and fixed auto-coupling installation solutions to meet the diversified needs of global engineering projects.

2. Core Features of QW & WQ Submersible Sewage Pumps

• Large-Flow Channel Non-Clogging Hydraulic Design: Designed with large-flow channel anti-clogging hydraulic components, greatly improving dirt-passing and solid handling capabilities.
• Double End-Face Hard Alloy Mechanical Seal: Constructed with durable and wear-resistant tungsten carbide, working in tandem with an oil isolation chamber to ensure long-term reliable sealing.
• Smart Oil-Water Leakage Probe Protection: An oil-water probe element is installed inside the oil chamber. If the mechanical seal on the pump side is damaged and water enters the oil chamber, the probe sends a signal to trigger control system protection.
• Full-Protection Electrical Control System: Can be paired with a fully protective pump control cabinet to protect against overload, short circuits, phase loss, over-temperature, and water leakage.

WTY Conclusion: The non-clogging hydraulic channel and oil-chamber leak probe protection represent the core technological strengths of the QW/WQ series. WTY subjects every unit to air-tightness tests and hydraulic testing before delivery to prevent onsite operational failures.

3. Main Technical Advantages

• Low Maintenance Cost & Long Service Life: Compact structure with replaceable wear-resistant sealing rings fitted between the impeller and pump body to lower long-term maintenance costs.
• Space-Saving Footprint: Pump and motor are coaxially integrated and operate fully submerged, eliminating the need to build expensive surface pump stations.
• High Operational Safety & Reliability: Motor stators adopt Class B or Class F insulation. Reassembled units undergo a 0.2 MPa air-tightness test after inspection or maintenance to guarantee motor sealing.
• Adaptable to Harsh Working Conditions: Efficiently handles various heavily polluted wastewaters with medium temperatures up to 60°C, pH values from 5 to 9, and liquid weight densities between 1.0 and 1.3 kg/dm³.

WTY Conclusion: Compared with traditional dry sewage pumps, QW/WQ submersible sewage pumps greatly shorten installation time and reduce pump house civil construction costs, making them the ideal choice for narrow spaces and underground drainage sumps.

4. Comparative Analysis

Table 1: QW/WQ Non-Clogging Submersible Sewage Pump vs. Standard Dry Vertical Centrifugal Pump