Multistage Pumps
The relatively simple and minimal design has made the centrifugal pumps the most common and widely used pump in the market. Based on the impellers, the centrifugal pumps are segregated into two categories, the single-stage, and the multi-stage centrifugal pumps. The single-stage pumps have a single impeller and such pumps are better used in higher flow, lower power installations. The multistage centrifugal pumps are used to provide a flexible range of flow and head a relatively higher degree of energy efficiency making them the ideal choice for many applications. In recent years, multistage pumps are the most popular type of pumps having multiple liquid chambers or stages connected in series and these pumps have as many as six stages. There are different types of multistage pumps such as a horizontal shaft and a vertical shaft.
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CVM Series Vertical Multistage Pumps
Multistage Pumps
MRP ₹31,100.00
Can Handle Max. Liquid Temperature Upto 120 Degree Centigrade
Cast iron parts coated with anti rust CED coating
High Efficient Pump
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Multistage pumps have several applications in commercial as well as domestic sectors. In these applications multistage centrifugal pumps are used to supply water, high-pressure shower systems, boiled feedwater industrial pressure boosting, water treatment, irrigation, constructions, liquid transfer and small power plants. Multi-stage centrifugal pumps come in two different variations including vertical and horizontal, and each has its own characteristic feature.
Multistage centrifugal pumps are used to make high pressure on the shaft in the same housing, which is typically more economical than a pump with a single impeller. The multistage pumps are associated with several benefits ranging from energy savings to the ability to operate in a wide range of head scenarios. Crompton’s state-of-the-art, innovative and unique multistage pumps are sure to provide excellent service.
What are Multistage Pumps?
Multistage pumps are used to pump the flow of fluids through two or more impellers which are fitted in the series. These pumps have multiple liquid stages or chambers connected in series and each of the stages consists of an impeller, a combination of the diffuser, and a return guide vanes, all housed within the same stage casing. However, in the scenario of high capacity requirement, the rotors are connected in parallel. The design of multistage pumps allows the fluid to flow through the chambers in a linear fashion.
In a multistage centrifugal pump, due to the impellers, a high thrust is generated and hence there will be a thrust balance device i.e a balance drum or a balance disc which reduces the thrust to a certain level. As a part of the pump structure, the channels within the pump function by directing an impeller discharge to suck the other one.
How do Multistage Pumps work?
With two or more impellers, multistage pumps are high-efficiency pumps and these impellers are mounted on the same or different shafts in a multistage centrifugal pump and are stacked on the same shaft. In a multi-stage pump, the fluid flows through an inlet towards the impeller and is managed by an engine or motor.
The rotation of the impeller is instrumental in creating a centrifugal force which helps in pushing the liquid to the outer tip of the impeller vane into the stage diffuser. The diffuser directs the to the eye of the other impeller and this process is repeated until it passes through every stage. And then it is finally passed to the final diffuser and into the pump discharge. The discharge pressure increases with each step until the fluid has completely passed through. In simpler terms, in the horizontal multistage pump and vertical centrifugal pump, the liquid enters the pumps and then passes through several impellers in a sequence from left to right.
Difference between Single-stage and Multistage Centrifugal Pumps
A single-stage centrifugal pump uses one impeller while a multistage centrifugal pump uses two or more impellers. In a multi-stage pump, there are additional components which are required for channelling the fluid from the first stage to the rest i.e diffusers. They also have a thrust balance device and also intermediate bearings in order to study the shafts and other minor differences.
The notable difference between single-stage and multistage centrifugal pumps is their impellers and how they affect the performance. The distinctive feature of the pump has some implications for the performance like pressure, efficiency and capability. While buying these pumps it is essential to note which one is to be chosen, depending on the working principle and the application.
Features & Specifications of Multistage Centrifugal Pumps
1. Since the multistage pumps have multiple impellers, it is capable of increasing the pressure of the water flow in series.
2. The head per stage is less which allows relatively smaller sized impellers with tight tolerance, thereby reducing the leakage loss.
3. It also helps in reducing the floor space. In addition, these pumps also require less motor horsepower which results in high efficiency and performance.
4. The increased number of stages lowers the level of noise than a single-stage pump.
5. Crompton’s multi-stage pump will have power ranging from 0.5 to 1.5 KW or 0.75 to 2 KW to give the best output. Its pipe size is 32 x 32 mm and has stages between 9 to 23 stages.
6. Crompton Multistage pumps are high-efficiency pumps and range from INR 21,800 to 22,000.
Multistage Pumps FAQs
Q1. What are horizontal multistage pumps?
Horizontal pumps have segmented casings with modular interstage components and these pumps work by pressurising the fluids as they move horizontally through the impellers. They are capable of working with higher flow rates.
Q2. What is the difference between a single-stage and a multistage pump?
The primary difference between a single-stage and a multistage pump is the number of impellers they have. Single-stage pumps have one impeller while the multistage pump has more than one impeller.
Q3. What are Multistage Centrifugal Pumps used for?
Multistage Centrifugal Pumps are used in industrial applications because of their capability to transfer fluids at higher pressures.
Q4. How does a Vertical Multistage Pump work?
A vertical multistage pump has two or more impellers and it functions by one impeller feeding into the next impeller and the impellers depend on the discharge pressure requirement.