Multistage Centrifugal Pump

What Is a Multistage Centrifugal Pump?

A multistage centrifugal pump is a type of centrifugal pump that uses two or more impellers arranged in series to increase fluid pressure and achieve higher head performance. Each impeller adds energy to the liquid as it passes through multiple stages, making these pumps suitable for high-pressure water transfer, industrial processes, booster systems and other applications requiring stable flow and pressure.

Working Principle of a Multistage Centrifugal Pump

A multistage centrifugal pump operates by converting motor power into hydraulic energy through multiple impellers. As liquid passes through each impeller stage, centrifugal force increases its velocity, while hydraulic components inside the pump convert velocity energy into pressure energy. The series arrangement of multiple stages allows the pump to achieve higher head and stable flow performance.

What Is a Multistage Centrifugal Pump Used For?

Vertical multistage centrifugal pumps are widely used in applications requiring high pressure, stable flow and continuous operation. Their compact structure and efficient performance make them suitable for various industrial and commercial fluid handling systems.

• Water Supply and Booster Systems: Multistage centrifugal pumps are commonly used in residential, commercial and industrial water booster systems. They provide stable pressure for buildings, factories and water distribution networks.
• Industrial Process Applications: These pumps are used for process water circulation, equipment cooling, boiler feed water and other industrial applications requiring reliable fluid transfer.
• Water Treatment Systems and Desalination: High-pressure multistage pumps are widely applied in water treatment systems, filtration equipment and desalination plants where stable pressure is required.
• HVAC and Cooling Systems: The compact vertical design and efficient operation make multistage centrifugal pumps suitable for heating, ventilation and air conditioning circulation systems.
• Food and Pharmaceutical Applications: Stainless steel multistage centrifugal pumps are suitable for applications requiring corrosion resistance and clean fluid handling, including food processing and pharmaceutical water systems.
• Irrigation and Agricultural Water Supply: High-head multistage pumps can provide efficient water delivery for irrigation systems and applications requiring water transfer over long distances or elevated areas.

ATO Vertical Multistage Centrifugal Pump and Selection Guide

ATO provides stainless steel vertical multistage centrifugal pumps from DN25 to DN125 and 0.5 HP to 60 HP for high-pressure water supply, booster systems and industrial applications. With compact design, efficient impellers and IP55 protection rating, these pumps deliver reliable performance and easy installation for different fluid transfer requirements.Select the right model based on the following factors:

• Flow Rate: Flow rate determines the amount of liquid the pump can deliver. Select a model according to the required water volume, usually measured in m³/h.
• Pump Head: Pump head indicates the height that a pump can move liquid or the pressure energy it can provide during operation, usually expressed in meters. Multistage pumps are designed for high-head applications because multiple impellers increase energy transfer and pressure stage by stage.
• Outlet Size: The outlet diameter affects pipeline compatibility and system flow capacity. ATO offers DN25, DN32, DN40, DN50, DN80, DN100 and DN125 models for different piping requirements.
• Motor Power: Choose motor power according to the required flow rate, head and operating conditions. Proper power selection helps improve efficiency and reduce unnecessary energy consumption.
• Liquid Type: Vertical multistage centrifugal pumps are mainly designed for clean water and low-viscosity liquids without solid particles or fibers. For special fluids, check material compatibility and operating conditions before selection.
• Installation Conditions: Consider available installation space, pipeline layout, voltage requirements and maintenance access before selecting a pump model.

Frequently Asked Questions

Q1: What is the difference between a single-stage and multistage centrifugal pump?
A1: A single-stage centrifugal pump uses one impeller to transfer fluid energy, while a multistage centrifugal pump uses multiple impellers arranged in series to achieve higher pressure and head.
Q2: Why choose a vertical multistage centrifugal pump?
A2: A vertical multistage centrifugal pump provides high-pressure performance, compact installation and efficient operation. Its vertical inline structure helps save space and simplifies pipeline installation.
Q3: Can a multistage centrifugal pump handle dirty water?
A3: Most vertical multistage centrifugal pumps are designed for clean water and low-viscosity liquids without solid particles. For liquids containing solids or abrasive materials, a specialized pump type may be required.
Q4: What materials are used in stainless steel multistage pumps?
A4: Stainless steel components are commonly used to improve corrosion resistance, durability and compatibility with clean water and industrial applications.