WQD-S Double-blade Cutting Type Sewage Electric Pump

The Double Vane Cutting Sewage Electric Pump is a powerful sewage pumping device specifically designed for wastewater environments containing long fibers, rags, plastic bags, and other easily tangled debris.
Simply put, it integrates the functions of "shredding + conveying" by utilizing a unique double-vane impeller structure and a built-in cutting system, building upon the design of ordinary sewage pumps. It acts like an underwater "shredder," capable of cutting up blockages before discharging them, completely solving the problem of ordinary pumps easily becoming clogged by hair and ropes.

Core Structure and Working Principle
The core competitive advantage of this pump lies in its "cutting mechanism" and "impeller design":
Double Vane Impeller Design (Core Power)
Unlike ordinary closed impellers, it has only two blades, and the blades are twisted.
Advantages: This structure creates an extremely wide flow channel, allowing solid particles and fibrous materials to pass through easily. At the same time, the double-vane structure generates less axial force during rotation, resulting in smoother operation and higher efficiency.
Built-in Cutting System ("Teeth")
At the pump's suction inlet, there is a set of rotating blades and a fixed blade seat (usually made of high-chromium alloy or stainless steel).
Working Process: When sewage enters the pump chamber, the long fibers, plastic bags, and other debris are instantly shredded by the shearing force created by the high-speed rotating blades and the fixed blade seat (usually shredded into particles ≤10mm), and then discharged under pressure by the impeller.

Main Features
Powerful Cutting, No Clogging
It can effectively shred rags, cloths, plastic woven bags, ropes, and even animal hair, ensuring that the pipes and pump body will not become tangled or clogged when conveying sewage containing a large amount of flexible debris.
Strong Drainage Capacity
Due to the wide flow channel and cutting function, it can smoothly pass large-diameter solid particles (usually up to 50mm or even larger), far exceeding the capacity of ordinary clean water pumps.
Smooth Operation, Long Service Life
The double-vane impeller design results in low bearing load and low vibration. At the same time, the motor usually uses a double-ended mechanical seal, effectively preventing sewage leakage and ensuring safe operation of the motor for a long time. Easy Installation 
As a type of submersible pump, it works directly submerged in water, requiring no priming and no pump house construction. Large pumps are usually equipped with an automatic coupling device, allowing for easy removal of the pump body for maintenance.

Application Scenarios
This pump is an expert in handling "dirty water," especially suitable for places prone to entanglement:
Domestic Sewage Discharge:
Septic tank cleaning, basement sewage lifting stations, residential community sewage discharge.
Particularly suitable for: sewage containing large amounts of toilet paper, feminine hygiene products, and cotton fabrics.
Industrial Wastewater Treatment:
Textile factories: wastewater containing cotton yarn and threads.
Slaughterhouses/food factories: wastewater containing animal hair, belts, and vegetable leaves.
Paper mills: wastewater containing pulp fibers.
Municipal and Construction:
Urban rainwater pumping stations (containing plastic bags, weeds).
Construction site foundation pit drainage (containing sand, cement bags).

Comparison with Ordinary Sewage Pumps
Feature Double-Blade Cutting Sewage Pump Ordinary Closed Impeller Sewage Pump
Impeller Structure Double-blade/Open channel Closed/Semi-open impeller
Cutting Capability Yes (built-in cutter) No (only relies on impeller thrust)
Anti-clogging Extremely strong Weak (easily clogged by fibers)
Particle Passage Large particles and long fibers are acceptable Only suitable for general particles, afraid of long fibers
Applicable Medium Extremely dirty sewage, feces, mud Relatively clean sewage or mud

Selection and Usage Suggestions
Material Selection:
For ordinary domestic sewage, cast iron (HT200) is the most cost-effective.
For seawater, acidic or alkaline wastewater, or applications requiring high hygiene standards, be sure to choose 304/316L stainless steel.
Misconceptions about Cutting Capability:
This pump can shred flexible debris (cloth, grass, plastic), but the cutting system is ineffective against rigid hard objects (such as wrenches, long steel bars, stones), and may even cause the cutter head to break. In such conditions, it is recommended to use a mixing type or non-clogging vortex pump.
Regular Inspection:
Although the cutting system is very durable, prolonged handling of high-hardness impurities will cause blade wear. It is recommended to regularly check the sharpness of the blades and sharpen or replace them when necessary.
If you are dealing with working conditions where the wastewater contains a lot of debris and is prone to entanglement (such as hair or plastic bags), a double-blade cutting type submersible sewage pump is the best "anti-clogging" solution.