Overview of QW and WQ Submersible Sewage Pumps

The QW and WQ non‑clog submersible sewage pumps are a new generation of pump products developed by integrating advanced foreign technologies with the specific operating characteristics of domestic pumps. They feature significant energy savings, anti‑entanglement and clog‑free operation, automatic installation, and automated control. These pumps excel at handling solid particles and long‑fiber waste, delivering exceptional performance. This series employs a unique impeller design and innovative mechanical seals, enabling efficient conveyance of fluids containing solids and long fibers. Compared with conventional impellers, the pump’s impeller adopts either a single‑channel or dual‑channel configuration, resembling a bent pipe of equivalent cross‑sectional area, which ensures excellent flow passage. Paired with a well‑designed volute, this design results in high efficiency and balanced dynamic and static performance, ensuring vibration‑free operation. The pump boasts advanced, mature hydraulic performance; test results show that all key performance parameters meet relevant standards. Since its market launch, the product has been widely praised by users for its distinctive effectiveness, reliable operation, and consistent quality.

Application Scope of QW and WQ Submersible Sewage Pumps

1. Municipal engineering projects and construction sites;

2. Wastewater discharge from residential areas;

3. Wastewater discharge from hospitals, hotels, and similar facilities;

4. Urban wastewater treatment plant drainage system;

5. Civil defense system drainage stations and water supply facilities of the municipal waterworks;

6. Discharge of severely polluted wastewater from factories and commercial establishments.

Product Features of QW and WQ Submersible Sewage Pumps

1. Featuring a large‑flow‑path, anti‑clogging hydraulic design, this pump significantly enhances its ability to pass debris, effectively handling fibrous materials up to five times the pump’s nominal diameter and solid particles with diameters of approximately 30% of the pump’s diameter.

2. The design is well-optimized, the accompanying motor is appropriately matched, resulting in high efficiency and significant energy savings.

3. The mechanical seal employs a double‑stage tandem configuration, with a hard, corrosion‑resistant tungsten carbide material that offers exceptional durability and wear resistance, enabling the pump to operate safely and continuously for over 8,000 hours.

4. The pump features a compact design, small footprint, easy mobility, and simple installation; it requires no pump house and can operate submerged in water, significantly reducing project costs.

5. The pump oil chamber is equipped with an oil‑water sensor; when the mechanical seal on the pump side fails and water enters the oil chamber, the sensor triggers a signal to protect the pump.

6. Upon customer request, it can be equipped with a fully automatic safety protection control cabinet to monitor pump malfunctions such as water leakage, electrical leakage, overload, and overheating, thereby ensuring reliable and safe pump operation.

7. The dual-rail automatic coupling installation system greatly simplifies pump installation and maintenance, eliminating the need for personnel to enter or exit the sewage pit.

8. The float switch can automatically start and stop the pump according to the desired water level, eliminating the need for dedicated supervision.

9. Ensure that the motor operates within its rated head range without overload.

10. Depending on the application, the motor can be equipped with a water-jacketed external circulation cooling system, ensuring safe operation of the pump even in dry‑run conditions.

11. Installation options include fixed automatic coupling installation and mobile free‑standing installation, catering to various application scenarios.

Meaning of Model Designations for QW and WQ Stainless Steel Submersible Pipeline Sewage Pumps

Wenzhou

For example: 25WQ8-22-1.1

25—Nominal diameter of pump discharge outlet (mm)

WQ Submersible Sewage Pump (Fixed Type) QW Submersible Sewage Pump (Portable, with Full Protection)

100 – Rated flow rate (m³/h)

15- Rated Head (m)

7.5 – Rated power of the matched motor (kW)

P-Stainless Steel