Your usual centrifugal pump can restrict the pressure limit due to the design constraint of a single impeller. However, a Multistage Pump has two or more impellers of the same or different types, i.e., low Net Positive Suction Head (NPSH) suction impeller, double suction impeller, or centrifugal first stage and side-channel impellers.
The design of a Multistage Centrifugal pump is similar to the usual centrifugal pump, except for the multistage parts that channel fluid into the impeller’s eye. The impellers face in the same direction, and this generates a strong thrust. However, this creates a thrust balance, which keeps the thrust down at levels manageable by standard-sized thrust bearings.
The working mechanism of a multistage centrifugal pump amplifies the thrust at previous levels to move forward. The thrust created by one impeller is cascaded by the next one, causing a build-up of thrust through the stages. The required number of impellers varies as per the final pressure required. The impellers are positioned in a sequence from left to right and the liquid is pushed with continuously rising pressure.
The Multistage Centrifugal Pumps find uses in diverse fields due to their pressure. These are great to pump water against gravity and can be used on constructions on the top floors of a skyscraper. They are also used for spraying and high-pressure cleaning in automotive and allied industrial works. Production of oil and fuel delivery to distant locations also requires high pressure, which Multistage Centrifugal Pumps can manage effectively.
A Multistage Pump is expensive and has a more complex design than the high-pressure duty pump. However, the Multistage Pump is a clear winner in efficiency and reliability. The great thing about these pumps is their uniquely flexible capacity. You can also configure it to have an inter-stage bleed off if you require high pressure at different points and in different directions. You may also run it at varying speeds to improve efficiency. Running the pump at a lower speed reduces noise, which is an important environmental consideration.
Multistage Centrifugal Pumps are available in different variants such as horizontal, vertical, submersible, side-channel pump, and vertical turbine pump. Which Multistage Pump you choose depends entirely upon your requirement and working environment.
For further information on industrial pumps, motors and other equipment, contact us on +91-9819907445. As a leading industrial water pump supplier in Mumbai, we would be happy to assist you in finding the best match based on your requirements. VEMC is an authorized Kirloskar dealer. It is ISO 9001:2015 certified and a pioneer in electromechanical engineering products, allied equipment, and services.