When sewage contains long fibers, rags, plastic bags, and other debris prone to entanglement, standard submersible pumps quickly face clogging and downtime. The WQK Series Cutter Submersible Sewage Pump addresses this challenge with an integrated cutting mechanism that breaks down solids before they can jam the impeller or block discharge pipes.
How the WQK Cutter System Works
Unlike conventional WQ-type non-clog pumps that rely solely on large-passage impellers, the WQK series adds a dedicated cutting mechanism upstream of the impeller. This rotating cutter shreds long fibers, cloth strips, and plastic materials into smaller fragments that pass smoothly through the pump body and discharge pipeline. The result is significantly reduced risk of impeller wrapping and flow channel blockage, even in sewage with high fiber content.
Key Technical Features
- Large-Passage Anti-Clog Hydraulics: The oversized impeller design handles fibers up to 5 times the pump discharge diameter and solid particles approximately 50% of the diameter.
- Dual-Series Mechanical Seal: Hard, corrosion-resistant tungsten carbide seal material enables safe continuous operation for over 8,000 hours.
- Oil-Water Sensor Protection: A probe in the oil chamber detects mechanical seal failure and triggers a protective signal before water reaches the motor.
- Compact Submersible Design: No pump house construction needed. The unit operates submerged, reducing engineering costs.
- Automatic Coupling Installation: Dual-rail auto-coupling system allows installation and maintenance without personnel entering the sewage pit.
- Float Switch Control: Automatically starts and stops the pump based on water level changes, eliminating the need for dedicated operators.
- Water-Jacket External Cooling: Motors with water-jacket cooling can safely run in dry (water-free) conditions without overheating.
Model Designation System
| Code | Meaning |
|---|---|
| WQK | Submersible Sewage Pump with Cutter |
| 80 | Nominal Pump Discharge Diameter (mm) |
| JY | With Agitation Device |
| P | Stainless Steel Material |
| B | Explosion-Proof Type |
Example: 80WQK40-15-4 means 80mm discharge, 40 m3/h flow, 15m head, 4kW motor.
Operating Conditions
- Media temperature: 60 C or below
- Specific gravity: 1.0 to 1.3 kg/dm3
- pH range: 5 to 9
- Minimum operating head: at least 60% of rated head to prevent motor overload
- Motor current must not exceed rated value during operation
Typical Applications
- Municipal wastewater treatment plant discharge systems
- Construction site drainage
- Residential sewage pumping stations
- Civil air defense drainage stations
- Hospital, hotel, and commercial facility sewage discharge
- Industrial and mining drainage
- Rural biogas digesters and agricultural irrigation
Installation Methods
Fixed Auto-Coupling Installation: A specially designed base is anchored at the bottom of the sewage pit and connected to the discharge pipe. The pump slides down guide rails and automatically couples with the base seal. Lifting disengages the coupling automatically for maintenance.
Mobile Installation: The pump is supported by a stand and connected to a flexible discharge hose. Ideal for emergency drainage, maintenance construction, or locations requiring frequent relocation.
Maintenance Best Practices
- After pumping thick or viscous slurry, run the pump in clean water for several minutes to flush out residues.
- Replace oil in the oil chamber every 300-500 hours of operation to maintain mechanical seal lubrication.
- Remove the pump from water during extended idle periods to prevent motor winding moisture damage.
- After disassembly and repair, conduct a 0.2 MPa air-tightness test on the housing assembly.
For detailed specifications and model selection, contact our technical team.