Slurry pumps (and submersible slurry pumps) are designed for pumping thick materials that can consist of such things as slurries, sand, gravel, mud, crushed rock, muck, manure, and many other highly viscous materials. Typically, a slurry is a mixture of a given material such as crushed rock and water. A slurry pump is purpose built with robust pump components and mechanical seals for pumping abrasive slurries and viscous fluids from the material source, into and through the pump, and downstream to its final destination.
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Slurry pumps are inherently rugged by the nature of what they do and are capable of pumping high viscous and high specific gravity solid-laden slurries without clogging. This is why a standard centrifugal pump will often not move highly abrasive slurries over long periods of time.
The non-clogging aspect of a slurry pump design is one of the most critical differentiating factors compared to other pump types. These pumps usually feature heavy duty construction and high efficiency impellers and perform in some of the harshest environments, including dredging, oil & gas, power generation, mining, wastewater treatment, frac sand pumping, and many other industries.
If you need help with pump selection, sales or engineering support, call 619-404-.
The following list of 8 significant considerations is to help you understand your pump application necessities in relation to selecting the best-suited pump for your heavy duty abrasive applications. The greater the viscosity, particle sizes, specific gravity, abrasion, and other important fluid and non-fluid characteristics make selecting a pump more difficult because these factors play into the situation at a greater level of importance, making the following application specifics even more critical.
The key reason these specialized centrifugal pumps offer reliable performance lies in their ability to transport large volumes of slurry with relatively low energy consumption. The centrifugal action, where a rotating impeller creates a flow by converting mechanical energy into kinetic energy, allows for continuous movement of slurries over long distances with reliable operation. Unlike other pump types (including twin screw pumps and other positive displacement pumps), centrifugal slurry pumps can handle large particles, high solids concentrations, and highly viscous fluids without clogging or excessive wear.
Their robust design, including materials like hardened steel or elastomers for critical wear pump components (such as pump shaft, inlet valve, outlet valve, suction hose and pumping chamber), ensures longevity and minimizes downtime, which is crucial in industrial operations where any disruption of fluid flows can lead to significant financial loss. Centrifugal slurry pumps also have the flexibility to be customized for specific applications, such as varying impeller designs or the use of liners to match the slurry's characteristics (including corrosive liquids or abrasive particles), ensuring superior performance and extended service life.
In dredging, for example, these pumps help transport large volumes of sediment, sand, and rocks, perfectly suited to heavy duty applications, land reclamation and navigation maintenance. In mining, they are used for transporting ore slurry in mineral extraction processes. Their reliability, versatility, and ability to move challenging materials make centrifugal slurry pumps indispensable in any slurry applications.
A slurry is essentially a mixture of fluid and fine solid particles, and its composition can vary widely depending on the specific application. Generally, slurries are classified into two categories: non-settling and settling. Non-settling slurries consist of very fine particles and have low erosive wear properties, making them easier to pump. On the other hand, settling slurries are formed by coarse particles and have higher wear properties, which can pose more challenges during pumping. The composition of a slurry can include a diverse range of materials such as manure, cement, starch, or coal suspended in water or other liquids. Understanding the specific composition of your slurry is crucial for selecting the right pump and ensuring greater efficiency slurry pumping.
Slurries possess several distinct properties that significantly affect their behavior and handling, making standard pumps inappropriate. These properties include:
Understanding these properties is essential for selecting the right pump and designing an effective slurry pumping system. Each property influences the choice of pump type, material of construction, and overall system design.
Centrifugal slurry pumps are specifically designed to handle the heavy and abrasive nature of slurries. Key features of these pumps include:
The design and construction of a centrifugal slurry pump are critical to its performance and longevity. By incorporating these robust features, centrifugal slurry pumps can effectively handle the challenges of pumping abrasive and heavy slurries, ensuring reliable and efficient operation in various slurry pumping applications.
EDDY Pump Product Categories
If you are pumping slurry, brines, high solids, extremely viscous material, paste, high abrasives (sand & gravel), and material filled with solids, then you found the best-suited pump for the job. Go to: https://eddypump.com/ or Call Us!
Pump Orientation Options
When choosing a slurry pump for an application, there are two categories of slurry pumpsbased on product orientation; vertical pump and horizontal pumps. Vertical or horizontal refers to the shaft orientation. Both pump orientations have their advantages and disadvantages. Vertical pumps help to reduce the space required for pump location and can be maneuvered into smaller spaces, whereas horizontal pumps are the most common pump orientation.
The EDDY Pump is considered one of the premier self-priming high viscosity and high specific gravity pumps in the world and has been designed specifically for demanding applications that require the transfer of thick, abrasive, heavy solid laden materials. The non-clogging design of the pump includes an enlarged wetted path and recessed rotor. This allows the pump to move large volumes of viscous material through the pump without clogging and causing downtime to your application.
Premier Pump Design
The unique design of the recessed rotor creates an Eddy Current as it spins inside the volute. This method of displacing fluid via the uniquely designed recessed rotor creates a vortex (a circular current of fluid) at the pump inlet that assists with drawing the material to be pumped into the volute, exiting the pump discharge, and pumping the material downstream of the pump to the desired location. The Eddy Current also keeps particles and solids maintained in suspension which is critical when pumping high viscous, solid-laden material. The EDDY Pump's ability to pump concentrated solid matter is perfect for moving viscous materials with as much as 40-70% solids by volume; an impossible task for a lot of traditional pump types. The EDDY Pump can also pass extremely large solids that are almost the size of the liquid inlet and liquid discharge of the pump; these results are beyond the scope of what most other traditional pumps can achieve.
Contact us to discuss your requirements of Vertical Slurry Pump. Our experienced sales team can help you identify the options that best suit your needs.
Low Cost of Ownership
An important factor when choosing the best pump for your application goes beyond whether or not the pump can meet the application requirements; there is also the subject of Cost of Ownership and how much it costs you to operate your pump over the course of the pump's lifetime. Due to the EDDY Pump's ability to pump high viscous and high specific gravity materials with the volume of very high solid and extremely low water content, the cost to pump the material is drastically reduced. The accruing cost of water that goes along with using pumps that require a high water content to move viscous materials dig very deep into your profits.
Materials of Construction
The EDDY Pump is made of the highest quality materials and is extremely rugged, abrasion resistant, chemically compatible with most fluids, and capable of withstanding a great deal of punishment that is typically inherent in abrasive, high viscosity, and high specific gravity, slurry applications. For more information on the EDDY Heavy-Duty High Viscosity and High Specific Gravity pump go to https://eddypump.com/ or give us a call today!
If you need help with pump selection, sales or engineering support, call 619-404-.
How EDDY Dredge Pumps Work Vs. Centrifugal pumps. EDDY Pump technology explained. Learn more about EDDY Pump Technology.
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What can you recommend to increase safe operation of my slurry pump?
Apart from the usual guarding of rotating components, it is important to get advice from the manufacturer or their dealer. This is especially true if buying a Slurry Pump secondhand ' just because the manual says it was designed to pump 2,000 gpm, it may not pump anywhere close to that if the duty isn't the same as the original. Each duty is very specific. Let's say you installed the Slurry Pump and had the wrong size pipe, you could have a critical issue with material settling out, which may even cause the Pump to explode.
This phenomenon has been reported by the Mine Safety and Health Administration ( bulletin) as a major concern. If a condition occurs that blocks the inlet pipe and outlet pipe of the Slurry Pump, it is estimated that 40% of the energy from the motor will go to heating the contents of the wet end of the Slurry Pump. The heat rise can be rapid and steam pressure will build, and an explosion can occur. Confirming the correct flow rate to keep materials in suspension and maintaining the design percent solids and particle size can reduce this risk. Installing power and pressure monitoring sensors that are interlocked and/or alarmed are also advised. Tobee's recently developed thermocouple device is another safety feature when fitted and alarmed.
Good process design, proper mechanical design of sumps and piping, and use of safety related add-ons are factors determining the safe operation of a Slurry Pump. The manufacturer is always the best place to start.
When I reduced the length of pipe line, why did the slurry pump trip out on overload?
Because the Slurry Pump is running at fixed speed and hasn't been told that you removed a section of pipe, it will keep spinning away but now finds it is easier to slurry pump. If you look at your slurry pump curve, you will see that if you lower the head (resistance) that the Slurry Pump is pumping against, the new duty point will move to the right and the speed curve and head will intersect at a higher flowrate. The higher flowrate means more work is being done and thus power demand is greater. It would be the same if you reduced the height you are pumping to. The opposite occurs if you increase the head by adding pipe or vertical height to the discharge point. The danger with increasing the head without changing the speed is the lower flowrate that results, which may be below the critical setting velocity. Contact the slurry pump manufacturer if you are contemplating changes to any part of your slurry pumping system.
Can I use oil in my slurry pump bearings?
Tobee's slurry pump bearing assemblies are designed around the use of grease lubrication - this means that the seals being used are not suitable for oil. It is more complicated to design for oil and any leakage is far more troublesome for both lack of lubrication and the spillage. Grease lubrication simplifies maintenance and is appropriate for the rpms typically seen in this type of equipment
I have an old slurry pump sump that my grandfather used in our old plant, can I use that for my new plant?
Rather than just say no, which would be the first reaction from any Slurry Pump manufacturer, let's examine why you probably don't want to consider this. From our perspective, 90% of problems are on the suction side of a Slurry Pump. Of those problems, 90% of those are associated with poor sump design, such as wrong wall angles (buildup in valley angles and corners), too shallow (vortexing), too big (settling and sloughing), too small (air entrainment, vortexing) and incorrect suction line (entrainment and NPSH issues). The science of sump design doesn't start or finish with a cube or an old truck-mounted water tank ' a correctly designed sump can save you many thousands of dollars in maintenance on your Slurry Pump, or even save a life.
My slurry pump bearings are running hot, what should I do?
How hot are they? Tobee's slurry pump bearings are designed to run at a relatively high temperature ' we set a maximum of 120 ' (248 '). Possible reasons for bearings running hot logically include slurry pump bearing failure; however, typically there will be other symptoms, such as unusual noise. Bearing failure can occur soon after gland failure if slurry has entered the seal at the wet end of the Slurry Pump.
It may simply be a faulty bearing. Were original equipment manufacturer bearings used during the last repair? It wouldn't be the first time that price over value resulted in low-quality bearings being substituted.
Failure, or symptoms of failure, can also occur due to high belt tension (drive end) or air entrainment or cavitation (wet end), which will ultimately damage the bearings. Confirm the temperature rise (rises over time or almost immediate) and ultimate temperature. Look for other symptoms, such as noise. Ensuring personal safety, use a listening stick against the housing for signs that the bearings are not running smoothly. Consult the factory with the range of symptoms.
Fortunately, Tobee's slurry pump bearing assemblies are simple to repair ' purchase a bearing repair kit and follow the instructions. Be prepared with an oven for heating, but the assembly requires no preload settings ' just locate the bearings in place, lubricate and put the end caps on, finish lubrication and you are done.
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