Multistage Ring Section Pump is a type of centrifugal pump designed to generate high pressure by using multiple impellers (stages) arranged in series. These are commonly used for applications requiring high heads and relatively low flow rates.

Key Components:

• Impellers

  • Multiple impellers mounted on a single shaft.

  • Each impeller adds energy to the fluid, increasing pressure at each stage.

• Diffusers / Volutes

  • Guide the fluid between stages efficiently.

  • Often part of a ring section design (modular casing segments).

• Ring Sections

  • Individual casing segments for each stage.

  • Bolted together to form the complete pressure casing.

• Shaft and Bearings

  • Central shaft transmits power from motor to impellers.

  • Supported by radial and thrust bearings.

• Sealing System

  • Mechanical seals or gland packing to prevent leakage at the shaft.

Working Principle:

• Fluid enters the first impeller at low pressure.

• Each impeller imparts kinetic energy, and diffusers convert it into pressure energy.

• The fluid passes through multiple stages until the desired pressure is reached.

• Outlet is at the final stage.

Applications:

• Boiler feedwater systems

• High-pressure water supply

• Desalination plants

• Reverse osmosis

• Oil and gas industry

• Mining and metallurgy