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.
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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.
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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.
Low Cost of Ownership
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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 assistance 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.
HD (Heavy Duty) Slurry Pumps / Dredge Equipment
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A slurry pump is different from many other types of pumps due to its ability to pump very thick, viscous, abrasive, and heavy fluids that are either particle and/or solid laden. To pump this type of fluid is very demanding and most traditional types of pumps just cannot get the job done. A slurry pump is designed with extra-large flow paths through the wetted portion of the pump, and has the ability to maintain fluid velocity so that the fluid does not settle inside the volute and clog the pump. As a rule of thumb, traditional pumps are more suited for thin fluids because they do not include the design features of a slurry pump; they usually have tight internal tolerances between the impeller and the inside of the volute of the pump, which impedes the flow of thick, viscous, particle and solid laden fluids associated with slurry applications.
Slurry pumps are also made of materials that withstand a great deal of abrasion from the abrasive slurries that these specialized pumps are suited to. These types of pumps must also be durable enough to withstand rocks going through the pump, which have a tendency to bounce around inside of the pump as they pass through the wetted housing, which can cause cracking, ruptures, and catastrophic pump failure. Slurry pumps can endure the greater punishment that is inherent in slurry applications. Slurry pumps are subjected to the most extreme circumstances and perform well in many industries, including pumping sand, dredging, mining, oil and gas, fracturing, and many other application types that pump thicker fluids.
The following is a list of 8 considerations for choosing a slurry pump best suited for a slurry application. Selecting a pump for a slurry application is more difficult than for an application involving thinner fluids. If a mistake is made in the pump selection process, the pump chosen will most likely not work well, or will not pump the higher viscosity, abrasive, heavy, solid laden fluid at all, which renders the new pump useless!
The fluid or material type and its characteristics are among the most important considerations. Is it a slurry, mud, sand, etc.
The materials that the pump is made of are necessary because the pump must be chemically compatible with the fluid being pumped. If the pump’s materials of construction and the liquid are not consistent, it can cause the pump to either melt down or crack, resulting in catastrophic failure of the pump, and can also cause damage to the immediate area surrounding the application and cause injury to workers.
The pump must also handle the abrasive characteristics of the fluid being pumped. If not, abrasive fluids can scour through the pump casing and cause premature wear of the internal pump components such as the rotor or impeller.
Pipe length, diameter, and the type of material of the piping are essential factors that are often not strongly considered when constructing a pumping system.
Motor power, usually indicated by horsepower (HP), is important on any pump but wildly when pumping slurries and fluids with high specific gravity and viscosity because thicker, heavier fluids require a more significant amount of power and force to move the fluid or material to the desired final location.
The motor power must also be sufficient enough to overcome any forces within the discharge piping downstream of the pump. These forces within the discharge piping could be a result of pipe components such as tees, bends, and upward grades that create something that is referred to as discharge head pressure which is measured in PSIG.
Another important consideration that most pump user does not think about is the cost and economic impact of the pump. Having the best-suited pump for an application also includes how much money it requires to keep that pump running for whatever duration it is in service. It not only has the energy the motor uses but also involves selecting a pump that can move viscous material with low amounts of water or accompanying fluids.
Water and accompanying fluids used to make pumping viscous solid laden material possible can cost a lot of money. If these fluids can be reduced, it can save thousands of dollars on operating expenses.
The pump must be located in a manner that does not hinder its operation of the pump. In applications where the pump is positioned above the fluid to be pumped, the pump cannot be located higher than the pump’s ability to draw the liquid into the pump intake. If the pump is positioned at an elevation that is greater than the pump’s ability to remove the fluid into the pump, the result will be that the pump will not achieve prime, and the desired flow rate will not be reached, or even worse, the pump will not pump the fluid at all.
One last point to mention is pumped orientation. Pumps can be purchased with several different orientation options. The most common are vertical and horizontal, which refers to pump shaft orientation. Depending on the specific application, vertical and horizontal pump orientations can be the better choice. Horizontal orientation is the most purchased orientation, but vertical orientation can be better suited when a pump is used in a smaller space.