VIPTech GmbH Logo

Pumps

Centrifugal pumps

Robust flow pumps for high flow rates — as close-coupled, magnetic drive or multistage versions for water, chemicals and process media.

Centrifugal pumps generate pressure via a rotating impeller. They are the most economical solution when large volume flows of thin media have to be moved at moderate pressure — in continuous operation, energy-efficient and low-maintenance.

For aggressive or leakage-critical media we supply magnetic drive centrifugal pumps without shaft seals. From our range: Price Pump, Lowara and Grundfos.

Request advice

Technical features

  • High flow rates with steady volume flow
  • Single-stage and multistage for higher heads
  • Magnetic coupling as a hermetically sealed alternative
  • Materials: stainless steel, cast iron, plastics, special alloys
  • Speed control for energy-efficient part-load operation
  • NPSH-optimised design against cavitation

Typical applications

  • Water supply and pressure boosting
  • Cooling and process water circuits
  • Chemical transfer and dosing systems
  • Electroplating and surface treatment
  • Cleaning and washing systems
  • Heating and air-conditioning technology

Centrifugal pumps: efficiency, curve and operating point

The operating point of a centrifugal pump lies where the pump curve intersects the system curve. If the pump is oversized, this point shifts to the right, efficiency drops and bearings and mechanical seal take radial loads. A pump two sizes too large often costs more energy over ten years than its purchase price.

Avoiding cavitation

Cavitation occurs when pressure at the impeller inlet falls below the vapour pressure of the medium. Remedies are short suction lines, large cross-sections, flooded suction instead of suction lift and – with hot media – a clear safety margin on the system NPSH.

  1. Calculate the system curve instead of estimating it
  2. Operate the pump at 80–110 % of its best efficiency point
  3. Use speed control instead of throttling
  4. Match the sealing system to the medium – with solids or chemicals switch to air-operated diaphragm pumps from Versamatic

Related topics and brands

Direct links to the matching pump and nozzle categories as well as our distributor pages for Flojet, Delavan and Versamatic.

Frequently asked questions

When does a magnetically coupled centrifugal pump make sense?
Whenever zero leakage is required: with acids, alkalis, solvents or odorous media. There is no mechanical seal that can wear out or leak.
How do I avoid cavitation?
The plant's available NPSH must clearly exceed the pump's required NPSH: short suction line, adequate cross-section, low suction lift and consideration of the medium temperature.

Related pages

Pumps overviewGear pumpsImpeller pumpsNozzles overview