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Dosing Pumps

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High Pressure Dosing Pumps

Rubicon Science is pleased to offer Knauer’s wide range of German-designed and manufactured high pressure dosing pumps. They are highly accurate two-piston pumps for applications in the chemical and pharmaceutical industries as well as in research and method development. They pump and dose aqueous and organic liquids, aggressive media or liquid gases. The metering pumps have high chemical resistance, excellent flow rate precision and low pulsation of the pumped medium in a wide range of applications: 

  • Flow rates from 0.01 ml/min to 1,000 ml/min
  • High pressure range up to 1000 bar 
  • Wide temperature range from -10 °C to 120 °C
  • Viscous liquids up to 1,000 mPa-s

The types of dosing pumps available are listed below. Alternatively, if you have a specific application CONTACT US and let us know what you would liked to do and we will recommend the best pump(s) for your application.

AZURA Pump P 2.1S series

With its small footprint, the compact dual piston pump AZURA P2.1S can be used for a wide range of laboratory tasks. A pressure rating of up to 400 bar and chemical resistance to a wide range of eluents make it the perfect choice for LC and dosing applications. Pump heads with maximum flow rates of 10 and 50 ml/min are available.

AZURA Pump P 2.1S
  • Compact High Pressure Dosing Pumps
  • 10 ml/min and 50 ml/min pump heads
  • Stainless steel, ceramic and Hastelloy C pump heads.

AZURA Pump P 4.1S series

With its small footprint, the compact dual piston pump AZURA P4.1S can be used for a wide range of laboratory tasks. A pressure rating of up to 400 bar and chemical resistance to a wide range of eluents make it the perfect choice for LC and dosing applications. Pump heads with maximum flow rates of 10 and 50 ml/min are available.

AZURA Pump P 4.1S
  • Compact High Pressure Dosing Pumps
  • 10 ml/min and 50 ml/min pump heads
  • Integrated pressure sensor.
  • Stainless steel, ceramic and Hastelloy C pump heads.

BlueShadow Pump 40P series

The BlueShadow Pump 40P was designed to provide exceptionally precise and reliable solvent delivery for a wide range of HPLC and dosing applications. Exchangeable pump heads with maximum flow rates of 10 and 50 ml/min cover a wide range of high-pressure dosing tasks. Practically pulse-free flow is achieved by our enhanced smart drive control which actively prevents pressure ripple instead of just dampening it. The improved design ensures a low dead volume and the inline filter protects your column from clogging and pressure build-up.

BlueShadow Pump 40P
  • 10 ml/min and 50 ml/min pump heads
  • Integrated pressure sensor & filter
  • Stainless steel and ceramic heads.
  • Active pulsation compensation.
  • RFID for automatic pump head detection.
  • Optional HT version up to 120°C.

BlueShadow Pump 80P series

The BlueShadow preparative pump 80P delivers stable and precise solvent flow for semi-preparative as well as preparative HPLC applications. By adding one or more additional pumps, binary, ternary or even quaternary high-pressure gradient systems can be easily configured. The pump can also be equipped with a binary or ternary gradient valve block to configure cost-effective low-pressure gradient systems. Exchangeable pump heads for flow rates up to 1 000 ml/min and pressures up to 40 MPa make it possible to easily optimize the pump to changing performance requirements and allow simple maintenance. Available in stainless steel or biocompatible titanium versions, the pump heads enable a wide range of applications.

BlueShadow Pump 80P
  • 100, 250, 500 and 1000 ml/min pump heads
  • Integrated pressure sensor & filter
  • Stainless steel and titanium heads.
  • Active pulsation compensation.
  • RFID for automatic pump head detection.
  • Binary or ternary LPG block option.

High Pressure Gradient (HPG) and Low Pressure Gradient (LPG) Dosing Pumps

The analytical pump AZURA P 6.1L combines all essential components of a first class HPLC pumping system.

AZURA Pump P 6.1L

Three different configurations are available: A 2 × 2 binary high pressure gradient (HPG) for high accuracy blending of up to two eluents from two selectable solvents each; a low pressure gradient (LPG) for reliable blending of up to four eluents and a very cost-effective isocratic version for easy analyses. 

Choose between pump heads with a maximum flow rate of 10 ml/min and 862 bar backpressure, or pump heads with a flow rate of 5 ml/min and 1000 bar backpressure.

High Pressure 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.

Smartline Pneumatic Pump 1950

Application areas:

  • packing of HPLC columns at pressures up to 160 bar
  • delivery of supercritical fluids such as CO2 (with mounted pump head cooling device)
  • metering against constant pressure

The delivery flow rate depends on the compressed air supply and the back pressure of the column or system. Maximum delivery flow rate can be reached at minimum liquid pressure (below 1 bar). The minimum liquid flow rate (approx. 5 ml/min) is achieved at highest back pressure. The Smartline Pneumatic Pump 1950 (A50781) has a 1000 ml stainless steel pump head and can be operated at maximal 160 bar back pressure for solvent delivery.

Download (pdf 2.4 KB) a copy of Knauer’s High-Pressure Dosing Pumps and Accessories 2021/2022 brochure. It contains details of all Knauer’s high pressure dosing pump range and a full selection of spare parts, fixtures and fittings. The guide also includes information on Knauer’s high pressure valves (manual and motorized), their high pressure mixers and Coriolis Mass Flow Controllers.