Carver Pump RS Series Multistage Pumps

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The Carver RS is an all-around multistage, ring section pump designed for moderate to high-pressure applications and demanding water transfer and feed in mining, minerals, and marine, among others. RS multistage pumps are available in seven basic sizes and are designed to withstand pressures up to 100 bar. Constructed with either ductile iron or stainless steel, Carver Pump’s RS ring section pumps can fit the high-quality standards required from any operation.

RS multistage pump in Mining

RS multistage pump is designed for high-pressure duties, making it suitable for water supply and dewatering applications in the mining industry. The scope and area of the RS pump in the mines are very wide – it easily transports clean water without solids and efficiently pumps liquid with small particles. The RS pump is available in different materials, also making it suitable for fluids with chemical content compatible with the casing and elastomer materials.
The shaft seal of mining multistage pumps is generally sealed with packing, and a mechanical seal can also be used according to application requirements. Such design is utilised for viscosities less than 300 cst.

Know More About Carver Pump RS Series Multistage Pumps

RS Multistage Pump

Design Advantages

  • Interstage diffusers minimise radial loads for longer seal and bearing life
  • Suction and discharge casings can be rotated to meet a variety of piping configurations
  • Hydraulically balanced thrust loads at each stage to preserve bearing life
  • Oil-lubricated angular contact ball bearings handle axial thrust in either direction
  • O-ring sealed casing and interstages assure leak-free operation
  • Replaceable front and rear wear rings at each pump stage for easy maintenance

Available Options

  • Water and fan cooling options for temperatures above 220F
  • Optional ball bearing design: angular contact ball bearings (outboard); grooved radial ball bearing (inboard)
  • Materials: ductile iron, duplex stainless steel, etc.
  • Seal options
  • Carver composite material for wear rings and interstage bushings
  • Turbine and magnetic drive options

Technical Data

  • Flow: Up to 408 m3/h
  • Head: Up to 1000 m
  • Pressure: Up to 100 bar
  • Temperature: -30C to 149C
  • Speed: Up to 3500 RPM


  • Mining and minerals
  • Oil and gas
  • Marine
  • Petrochemical
  • Power generation
  • Pulp and paper
  • Industrial
  • Agriculture irrigation
  • Chemical and light hydrocarbon transfer
  • Coating and surface treatment desalination and reverse osmosis
  • Sprinkler system
  • Pressure boosting system
  • Sanitary wash down service
  • High-pressure injection


A multistage pump is a centrifugal pump with several impellers rotating on a single shaft, allowing the pump to reach higher pressures than single-stage/impeller pumps. The impellers are mounted in ring sections along the shaft, with each ring section having its suction casing on one side and discharge casing/diffuser on the other.
Following the centrifugal pump’s operation, the first impeller of a multistage pump draws fluid in and forces it to the tip of the impeller blades before flowing out the discharge casing/diffuser. The fluid then enters another ring section repeatedly until the fluid is discharged through the outlet of the pump. When stages of impellers are added, the flow rate is not altered, but the total head and shaft power increases proportionally to the number of stages.

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