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Pumps

KNAUER high pressure pumps are well-known for their compactness and reliability as hplc pumps as well as for dosing applications.

Exchangeable pump heads provide a maximum of flexibility and easy maintenance. Models with electronic compensation drive offer very low pulsation. AZURA pumps are available for state-of-the-art UHPLC, for extended performance HPLC (HPLC Plus), for standard analytical HPLC, and for lab-scale purification tasks up to 1000 ml/min. A pump especially useful for column packing is the Pneumatic Pump 1950.

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HPLC pumps

Dosing pumps

Pumps are used for a wide range of tasks in the food, chemical, and pharmaceutical industries. These can include the conveying and dosing of aqueous and organic liquids, highly viscous liquids, aggressive media, or liquid gases. Dosing at high or low temperatures (below 0 °C to over 100 °C) and at high pressures over 100 bar is also a common task.

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Dosing pumps for

  • High pressure
  • High accuracy
  • Aggressive liquids
  • Highly viscous liquids
  • High temperature
  • Low temperature
  • High pressure dosing pumps

    KNAUER pumps are designed for feeding liquids under high pressure. A selection of pump heads is available for customized chemical compatibility with a wide range of liquids. Different flow rate ranges and an optimized pump design enable excellent performance and high flexibility for demanding low, medium, and high pressure dosing tasks. Pump heads can be exchanged quickly to adapt easily to changing applications.

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  • High accuracy dosing pumps

    Demanding metering applications for liquids with different viscosities or precise batch dosing tasks need a particularly exact control of the flow rate. Since KNAUER pumps support a wide variety of communication interfaces, their pumps can be combined with a range of mass flow controllers to meet these challenging demands. KNAUER pumps can also be easily integrated into pilot plants or process environments.

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  • Aggressive liquids dosing pumps

    Strong acids and bases are often required for different liquid applications. KNAUER offers pumps with a choice of different pump head materials which can be used for demanding dosing tasks. Furthermore the pump design allows an easy replacement of parts which come in contact with aggressive and corrosive chemicals.

    This makes the KNAUER pumps ideal for metering aggressive liquids.

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  • Highly viscous liquids dosing pumps

    One important property of liquids is their viscosity and many pumps will struggle with highly viscous media. When bottling honey, it is typically heated moderately to reduce its viscosity, a principle applicable also to many other highly viscous liquids. If an increase of the liquid temperature is not suitable, pumps with a high engine performance will be required. KNAUER pumps with their powerful motor drives are adequate for these demanding conditions.

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  • High temperature dosing pumps

    Sometimes the supply of media or starting materials for a chemical reaction needs to be heated to properly meet the conditions of the process. This is where standard high pressure pumps can reach their limits. KNAUER dosing pumps withstand moderate liquid temperatures and can be equipped with thermally decoupled pump heads even for elevated temperatures.

    It is also possible to equip the pump with a pump head heating device for temperature sensitive applications.

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  • Low temperature dosing pumps

    KNAUER pumps cover a wide range of different demands. Chemical compatibility and working temperatures are just two possible requirements. Pumping liquids at low temperatures may be required in flow chemistry or in various applications involving liquefied gases. The wetted parts of the KNAUER pumps are capable of working under these conditions. With an optional pump head cooling device these pumps are perfect for dosing or feeding of liquefied gases or cooled liquids

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Pneumatic pump

Smartline Pneumatic Pump 1950

The Smartline Pneumatic Pump 1950, powered by compressed air, has been designed for solvent delivery in process chemistry, column packing or preparative chromatography.

Application areas:

  • packing of HPLC columns at pressures up to 1000 bar
  • delivery of supercritical fluids such as CO2 (with mounted pump head cooling device)
  • metering against constant pressure

pump accessories

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