Hydraulic Slurry Pump: Everything You Need to Know

If you think of the best Hydraulic Slurry Pump for a specific application, you will be confused, and it is just the beginning. Once a particular pump model and size are determined, it is up to the system engineer to match the appropriate motor to power it correctly.

Slurry pumps are commonly subjected to heavy-duty and demanding loads. Therefore the engines that power them must be equal to the task. Both hydraulic motors and electric motors can power this type of pump. Because every kind of pump motor has different benefits and needs, an engineer must consider various criteria before matching the motor type to the pump application.

The first step in selecting the proper pump is determining the pressure drop requirements based on the system characteristics.

What is a Slurry Pump?

Slurry pumps are the process industry’s backbone. The material must be moved from one location to another in a processing facility. Fluids travel from a high-pressure area to a low-pressure area according to thermodynamic laws, and depending on the plant structure, this often requires the aid of a pump. With so many types of pumps available, choosing the proper one can be difficult, especially when slurries are involved.

Slurries are classified into two types: settling slurries and non-settling slurries. This classification is based on the solid’s composition. Non-settling slurries comprise fine particles that remain suspended when the provided mixing energy is removed. As the name implies, settling slurries comprise solids whose particles settle out when applied to mix fuel and are removed. A designer must understand the type of slurry. Non-settling slurries, for example, can be transported in laminar flow conditions, but settling slurries require turbulent flow conditions, particularly in horizontal passages.

What Is a Hydraulic Slurry Pump?

Hydraulic slurry pumps are a type of hydraulic submersible pump propelled by hydraulics. They are helpful for slurry applications where electric power is unavailable, or variable speed is required.

The hydraulic submersible pump can also be equipped with an agitator to function similarly to submersible dredge pumps, and it is also referred to as a hydraulic dredge pump. If there is a hydraulic supply, the pump will function properly no matter where you are.

Our Hydraulic Submersible Pumps Wet Wear Parts are made with high chrome 27% material for good wear resistance performance, and the parts’ hardness may reach HRC62. We welcome customized material if you have a particular material required for your condition.

It is a wise choice for industries that face the most difficult pumping challenges:

  • Sewage By-Pass
  • Lime slurries
  • Mill scale
  • Coal runoff sumps
  • Wash down sumps
  • Ash transfer
  • Tailings ponds
  • Slag pits
  • Food wastes
  • Silt removal
  • Sand & gravel dewatering
  • Barge & tank cleanout
Advantages of Hydraulic Slurry Pump
High productivity

Our pumps are designed to pump fluids containing a high percentage of solids (maximum ash weight concentration can reach 45%, and maximum slag weight concentration can reach 60%).

So long service life

Because agitator pump wears parts are made of abrasion-resistant materials such as solid chromium alloy, pumps have more excellent stability and longer service life.

Various protective

The motor has several precautions, such as overheat prevention and a water-inlet detecting projection, and maybe run safely for an extended period in difficult operating situations.

Mechanical seal

The unique mechanical seal technology protects the electric motor from high-pressure water and contaminants, ensuring excellent suction efficiency.

Features of a Hydraulic Slurry Pump

A hydraulic pump is a machine that transfers mechanical energy into hydraulic energy. It provides flow with sufficient force to overcome pressure caused by the load. Kingdapump delivers massive solids production at meager operational expenses.

Design Features:
Hydraulic Motor

Hydraulic motors are devices that convert liquid pressure to mechanical energy. In theory, hydraulic pumps can be used for hydraulic motors, and hydraulic motors can also be used for pumps.

Hydraulic motors are devices that convert liquid pressure to mechanical energy. In theory, hydraulic pumps can be used for hydraulic motors, and hydraulic motors can also be used for pumps.

Hydraulic motors are classified into two types based on their rated speed: high-speed and low-speed.

High-speed hydraulic motors have rated speeds greater than 500r/min.

Low-speed hydraulic motors have rated speeds less than 500r/min.

 High-speed hydraulic motors are classified into four types: gear, screw, vane, and axial piston. Their key characteristics are high speed, a short moment of inertia, ease of starting and stopping, and high sensitivity in speed and commutation.

High-Efficiency Agitator

The Hi-chrome agitator blades produce the digging action. It raises settled sediments pulled into the pump, resulting in a continuous flow of concentrated slurry (up to 70% by weight) out of the pump discharge.

 Solid Handling up to 120mm

Pumps are built for sturdy handling up to 120mm and can work in the most challenging settings ( 5 inches).

Other design Features:

  • Hydraulic slurry pumps have standard high-efficiency agitators to lift settled solids.
  • High abrasion resistance with high chrome wears parts.
  • Low rotation speed to reduce wear effect.
  • Able to handle up to 70% solids by weight.
  • All electric motors are class H with a high service factor
  • A robust hydraulic motor guarantees strong torque and long life.
  • Cutters are designed to work up to 250m working depth, handled by a steel cable.
Installation And Use
  • Pumping tailing slurry for industrial and mining organizations;
  • Sucking silt in sedimentation basin;
  • Pumping fine iron ore for foreign countries, etc.;
  • Deliver a solid particle of mud, giant pulp, coal slurry, and sandstone;
  • Sucking from all kinds of fly ash power plants, coal slime
What is the Design Consideration in Hydraulic Pumps?

The hydraulic pump, in theory, turns high-volume, low-pressure flow into low-volume, high-pressure flow using only two moving parts.

Before we can think about design, we must first comprehend the concept. Consider a water faucet. Nothing happens if you turn it on and then gently turn it off. However, if you immediately switch it off, you may hear some pipes banging around.

Force is proportional to velocity and weight because water is weighty.

So, in a hydraulic pump, we want first to get the water moving so that it has velocity – and consequently force/energy. This is the purpose of the waste valve. This valve must be constructed to close when there is sufficient flow – aka energy.

In addition, we need an air chamber to act as a spring for the water hammer. The air gap and initial pressure in this tank must be sufficient to capture the maximum amount of energy from the water hammer (similar to compressing a spring) without being too “stiff” or “bottoming out.”

Like any other pump, a check valve is required to prevent the pump from being supplied from the exit. Between the air/spring chamber and the waste, the valve will be this check valve.

Finally, ensure the pipe sizing is appropriate for your flow vs. the pumping head you want to accomplish.

Characteristics of Hydraulic Slurry Pumps
  • Pump provided of agitator to stir things up
  • High abrasion resistance, Hardness no less than HRC58
  • Low rotation speed lead to long working life
  • Able to handle up to 70% per weight material density
  • No need for cables or an electric supply

These pumps are simple to install and operate using a mini-excavator. There are no cords. Hence there is no power! Connect your pump and go to work!

Hydraulic Motors vs. Electric Motors for Operating Slurry Pumps

How hydraulic and electric motors generate power determines how well each type of motor handles difficult situations. Electric motors generate electricity through the use of magnets and copper wire windings. When exposed to fine dust or moisture, salt spray causes corrosion.

Hydraulic motors are driven by separate diesel engines that generate power by burning liquid fuel (gas or diesel) inside a cylinder that powers the pump. Hydraulic oil is a fluid used to resist compression due to moving pistons that can power almost anything. Hydraulic power units perform well in the dirtiest and most difficult locations because no electricity is created and no delicate windings are involved. Hydraulic power units are housed and controlled separately from the pump, which keeps them clean. Because hydraulic units are more easily sealed than electric motors, they are also ideal for submerged installation.

Problems that arise during the slurry pumping operation also endanger the motor. Both hydraulic and electric types will eventually stall if the load on the engine increases considerably. The hydraulic system will normally restart without damage, whereas full stalling in an electric motor will frequently result in significant damage. With slurry pumps capable of creating abrupt load fluctuations, it’s difficult to protect an electric motor without oversizing it.


Hydraulic Slurry Pump is widely used to transport abrasive solid particles in mines, power, metallurgy, coal environmental protection, and other industries such as raw materials transportation metallurgy coal and iron plants, hydraulic ash removal in thermal plants, coal slurry and dense medium transportation in coal washing plants, river dredging and so on. There will be specific guidelines for you to consider choosing the perfect slurry pup that you need.

If you have questions about the hydraulic slurry pump, you can contact us anytime or call +86 18633935649 for faster transactions, and our senior engineers will answer you at any time.

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