The main difference between single-stage and multi-stage centrifugal pumps is the number of impellers they have, which is called the number of stages of the pump in industrial centrifugal pump industry terms. As the name suggests, single-stage pumps have only one impeller, while multi-stage pumps have two or more impellers. The main difference between single-stage and multi-stage centrifugal pumps is the number of impellers they have, which is called the number of stages of the pump in industrial centrifugal pump industry terms. As the name suggests, single-stage pumps have only one impeller, while multi-stage pumps have two or more impellers

Multistage centrifugal pumps operate by feeding one impeller into the next. As the liquid advances from one impeller to the next, the pressure increases while maintaining the flow rate. The number of impellers required depends on the discharge pressure requirements. The multiple impellers of the multi-stage pump are all mounted on the same shaft and rotate, essentially like separate pumps, and the multi-stage centrifugal pump can be regarded as the sum of the single-stage pumps.
Since a multi-stage pump builds the load by relying on multiple impellers to distribute the pressure of the pump, it can produce more power and higher pressure with a smaller motor and is therefore more energy efficient.

Let's use a table to compare single-stage and multi-stage pumps

Single-stage centrifugal pumpMulti-stage centrifugal pump
only one impellermultiple impellers
low-pressure headhigh-pressure head
simple structurecomplicated structure

Which is the Right Choice For You?

Which type of water pump is better, is mainly based on field operation data and actual needs to decide. According to the head height, choose a single-stage pump or a multi-stage pump. If single-stage and multi-stage pumps can also be used, single-stage pumps are preferred.

Compared with the multi-stage pump with a complex structure, high maintenance, and very difficult installation, the advantages of the single pump are very obvious. The single pump is simple in structure, small in size, stable in operation, and easy to maintain.

Common multistage centrifugal pumps

Horizontal Multistage Centrifugal Pump

Multistage PUMP

Vertical Multistage Centrifugal Pump

vertical-multistage-centrifugal-pump

Common single-stage centrifugal pump

End suction pump

end-suction-pump
In-line pump
vertical-pipeline-pump
Need help selecting the right centrifugal pumps for your application?
Contact us at anpump5@angroupcn.com or +86 15032857866;
Our technical sales engineers have extensive product knowledge and will be able to help you.

learn more centrifugal pumps also read

What is a centrifugal pump

How Multistage Centrifugal Pumps Work

Single suction pump vs. double suction pump

Many customers are asking how to choose a slurry pump and a water pump in different situations, In this article I will talk about what is the difference between a slurry pump and a clear water pump. The pumps talked about here are centrifugal pumps.

As the name implies, slurry pumps and water pumps pump different media. Everyone knows about water. Next, we will mainly introduce the slurry.

What is "slurry"?

A slurry is any mixture of fluid and fine solid particles. The slurry is common in the mining industry, such as tailings coal slurry, iron ore slurry, etc. The slurry is usually abrasive and/or corrosive.

Difference between the slurry pump and water pump

A slurry pump and a water pump are not the same things, each has a different purpose and they are not interchangeable systems

Slurry pumps are specially manufactured to handle these abrasive and/or corrosive slurries with replaceable, durable, and robust pump parts

Water pumps do not have the ability to efficiently pump solid or slurried particles, nor can they withstand the highly abrasive and corrosive nature of slurries.

Compared to the cramped and often inexpensive components of the water pump, the large replaceable slurry pump parts are made of specialized materials (such as high chrome alloys, ceramics, rubber, etc.) These components allow the pump to efficiently and safely move virtually any type of slurry in of solid particles

Three common slurry pumps

Horizontal slurry pump: The horizontal slurry pump is always installed on the ground. It is the most common type of slurry pump in different applications. Suitable for electric motor or diesel engine drives

centrifugal-slurry-pump

Vertical slurry pump: The vertical slurry pump is designed in some half-dry situations like sump and pool, its pump body is always underwater while the engine is above

slurry-sump-pump

Submersible slurry pump: The whole submersible slurry pump system work underwater, operating directly in the slurries, with no additional support superstructure

submersible-slurry-pump

AN Pump Machinery is a professional slurry pump manufacturer.

Need help selecting the right mining slurry pumps for your application?
Contact us at anpump5@angroupcn.com or +86 15032857866;
Our technical sales engineers have extensive product knowledge and will be able to help you.

In this article, we will learn about multistage centrifugal pumps. We'll look at some of the main components of a multistage pump and how they work.

A multistage centrifugal pump is a rotating device that converts kinetic energy into a liquid head. This is one way of defining a centrifugal pump. There are many more, but for us, this is enough. In simple language, you can say that it is a machine used to transport fluids from one place to another. Multistage industrial pumps are used in all facilities such as refineries, oil production platforms, petrochemical plants, power plants, etc. Of course, multistage pumps are also used in other industries such as agriculture, food processing and residential construction as well as water supply.

Here is a cross-sectional view of a multistage centrifugal pump, let's take a look at some of the main components of the pump and some common terms

cross-sectional view of a multistage centrifugal pump
External power from an electric motor or diesel generator or even a turbine is used as the drive to provide kinetic energy to the pump impeller. The fluid enters the impeller and flows out from the tip of the impeller under the action of centrifugal force. Exhaust through the volute. The working principle of the pump is the conversion of energy

On the left side of the pump is the suction port of the centrifugal multistage pump, which descends and enters the eye of the impeller. The impeller has a wear ring, and the impeller rotates inside the diffuser.
We have a seal on the left. This is a mechanical seal. Mechanical seals are used to seal the space between the pump shaft and the pump casing. This prevents any leaks. We also have a ball bearing, also known as an anti-friction bearing
The liquid comes in from the suction port, enters the perforations of the impeller, exits through the impeller, and enters each impeller one by one, repeating the same process. Once we get to the final impeller, the liquid is drained and it goes out the top here, out of this drain.

This is the general layout of a multistage centrifugal pump, but now let's talk in more detail about how it works and what happens to a liquid as it flows through the pump.

We suck in the liquid at the inlet and the liquid goes into the eye of the impeller. The impeller rotates, and the impeller itself rotates within a stationary diffuser housing. We can see that around each impeller is a diffuser.
In this particular pump, we have 7 impellers and 7 diffusers. The liquid enters the impeller's orifice and is thrown radially outward into the diffuser housing. Once it enters the diffuser, it changes direction and leaves the diffuser.
The purpose of both the impeller and the diffuser is to reduce speed and increase pressure. Once the liquid comes out of the diffuser, it will be drained into the space in the housing. It will then be fed into the eye of the next impeller. Repeating this process the liquid is thrown radially. It will go through the impeller, through the diffuser, and then again we will get a reduction in speed and an increase in pressure. We repeat this process 7 times, and finally, the liquid will be discharged from the 7th impeller, and then the liquid will leave the pump through the outlet.

Each impeller and diffuser is classified as a stage. Our pump has 7 impellers and 7 diffusers, so it is classified as a 7-stage pump. It is important to realize that at each stage we are increasing the pressure but the flow rate is not changing.

Let's take a look at some of the multi-stage pumps produced by An Pump Machinery

Motor-driven multistage pump

Multistage PUMP

Diesel engine driven multi-stage pump with 4-wheel trailer

diesel engine driven multi-stage pump with 4-wheel trailer

Learn more watch the video

Need help selecting the right multistage centrifugal pumps for your application?
Contact us at anpump5@angroupcn.com or +86 15032857866;
Our technical sales engineers have extensive product knowledge and will be able to help you.

Industrial pumps are the main part of any power plant (The heart of the power plant industry)
Every power plant needs a very efficient and standard quality of pumps that can work in the toughest condition with excellent power performance.
An Pump Machinery is a professional power plant centrifugal industrial pump manufacturer, we offer centrifugal Industrial pumps that meet and exceed the requirements of the most demanding quality specifications and industry standards such as API, ANSI, and ISO.

Last week, we provided a batch of centrifugal industrial pumps for a power plant project, mainly including four types: end suction pump, split casing pump, multistage pump and submersible sewage pump.

End suction pump: a centrifugal pump that designed a casing with suction going out one end and discharge is placed at the top coming out, the structure is relatively simple, and the operation is relatively simple available in Close-Coupled, diesel engine, electric motor. This project chooses the motor as the power drive, as the picture shows

Split case pump: named after the split design of the casting, in which the cover can be lifted from the pump to expose the internal components (impeller, shaft, double suction seal, bushings, bearings, etc.) for easy access to all working parts. It can be coupled with an electric motor and diesel engine. This project chooses the motor as the power drive, as the picture shows

split-case-pump

Multi-stage pump: a type of centrifugal pump that contains 2 or more impellers, the multiple impellers are all installed and rotated on the same shaft, and essentially act like separate pumps. It can be coupled with an electric motor and diesel engine. This project chooses the diesel engine as the power drive, as the picture shows

multistage-pump
diesel-multistage-pump

Submersible sewage pump: the pump is integrated with the motor and works completely submerged in the liquid, suitable for conveying different corrosive media without clogging. This project's submersible sewage pump flow 1500m³/h, as the picture shows

sewage-pump

The centrifugal industrial pumps loading cabinets

Each pump is fastened to the container with steel wire to ensure that it reaches the customer intact

centrifugal-industrial-pump-loading

Need help selecting the right industrial pumps for your application?
Contact us at anpump5@angroupcn.com or +86 15032857866;
Our technical sales engineers have extensive product knowledge and will be able to help you.

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