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What is a Non-Clog Pump?

Learn about what features help prevent clogs in pumps and the advantages non-clog pumps can bring to high solids pumping applications.

A non-clog pump generally refers to pumps with a 100% recessed impeller or specially designed open rotor. This design allows the passing solid objects equal to the width of the discharge of the pump. Non-clog pumps are highly sought after in applications that require transporting high solids material such as mining, sewage treatment, oil/gas industry, dredging and many more. While centrifugal pumps are great at moving clean water, adding solids or other abrasives can be devastating for the life of the pump, ultimately causing downtime and loss of production.

The EDDY Pump is a patented design that makes it completely different from any Centrifugal, Vortex or Positive Displacement Pump. The EDDY Pump does not have an impeller but is instead equipped with a geometrically designed rotor. When this rotor spins, it harnesses the power of a tornado within hydrodynamics, creating a perfectly synchronized Eddy Current. It is this Eddy Current that agitates the material and moves it through the pump without ever having issues with tolerances or clogging found in traditional pumps.

The EDDY Pump’s completely open rotor design inherently makes it the best non-clog pump on the market. The EDDY Pump exceeds all pump performances for handling heavy, debris-laden fluids and slurries.

Benefits of a Non-Clog Pump

Non-Clogging

EDDY Pump’s open rotor design promotes passage of large rocks, debris, rags and other fibrous or abrasive materials that clog other pumps.

No critical tolerance

As you can see the tolerance between the rotor and the volute in the 4″ EDDY Pump shown above easily allows the passage of a man’s arm, while the clearance in a centrifugal pump would never allow passage of such large debris. In a 2-inch to 10-inch EDDY Pump, the tolerance ranges from 1-9 inches. This translates to a significant amount of solids and debris passing through without clogging the pump.

Centrifugal pumps have critical tolerances in the design which can cause objects to become stuck between the pump casing wall and the impeller. If this happens repeatedly, it will cause maintenance problems and damage to the pump over time.

non-clog pump


High Viscosity

The EDDY Pumping effect is excellent at inducing viscous materials up into the pump suction, which is often very difficult with conventional pump technologies that require some form of feeding in order to facilitate pumping. When pumping thixotropic materials, the rotor acts as a mixer and provides a shear thinning effect to help increase production. When pumping viscous materials, the pump must be able to overcome the friction loss that is developed in long pipelines in order to maintain a steady flow rate.

A centrifugal pump with a performance that degrades over time due to wear will be adversely affected by the high-pressure drops associated with high viscosity pumping.


High Specific Gravity

The EDDY Pump is excellent at moving heavy materials through long pipelines. The EDDY Pump creates a turbulent flow that helps keep the heavier and abrasive materials in suspension. This enables the material moving down the pipeline to distribute the wear to the inside circumference of the pipe more evenly.

Centrifugal pumps create a laminar flow regime that wears the inside of a pipe, primarily on the bottom, which will dramatically decrease the life of your expensive pipelines.


High Abrasive / Corrosive Material

EDDY Pump’s Performance does not rely on maintaining critical tolerances between the rotor and the volute. With the proper choice of materials for the pump case and rotor, the EDDY Pump is the perfect solution for abrasive and corrosive applications that often cause significant issues for other pumps.

With centrifugal pumps, abrasive and corrosive materials eat away at the impeller and case which in turn opens up the critical tolerances and dramatically reduces the pumps performance over time.

You can be confident you will be rewarded with less clogging, lower maintenance costs, more uptime leading to higher production using the EDDY Pump. Call us to match the right sized pump to your job. View our different non-clog pumps here.

Why EDDY Pumps Are Better – Highlights

This video shows how EDDY Pump transports high slurry and abrasive materials. Featured dredge pump equipment includes the Remote Operated Subdredge, Diver Operated Pump and a Excavator Attachment Dredge Pump.

Order or Get Selection Help

Let our sales or engineering support help in your grit pump and wastewater equipment selection. Call (619) 258-7020