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Low Viscosity Liquids


Many commonly used types of pump have potential weaknesses when handling thin liquids. Piston/plunger pumps, gear pumps, centrifugal pumps and screw pumps are random examples – relying on the liquids they pump to lubricate to lubricate mechanical seals or provide a protective film between close tolerance moving surfaces.

Low viscosity liquids , including water, are generally poor lubricants so there is an underlying risk. Neglect of maintenance or delay in replacing seals is liable to be punished with premature pump wear – leading to loss of performance, reduced efficiency, energy wastage and eventually to pump failure

At high pressure or high liquid temperature, risks increase sharply. Heating a liquid will typically reduce its viscosity, and as it thins it becomes more likely to leak past a seal or contact area. Working at high pressure also exposes the pump to increased wear.

With no dynamic seals in its design the Hydra-Cell avoids all these risks, and Wanner’s files record many instances where the pump has replaced seal-reliant types, simultaneously saving energy, maintenance and repair costs and sustaining system performance.


See below for application examples from information supplied by customers


The Hydra-Cell Advantage

  • No dynamic seals
  • True positive displacement pumping action
  • Flow rate is virtually independent of operating pressure
  • Pumping efficiency is sustainable long-term – not vulnerable to internal wear
  • Pumps can handle non-lubricating liquids and liquids containing abrasive solids
  • Low shear pumping action