Do I need a special pump head for organic solvents?

When organic solvents are used, pump performance can be improved by using spring-loaded check valves. The following pump heads are available for normal phase applications:

  • 10 ml pump head (Art. Nr. AHB40BA)
  • 50 ml pump head (Art. Nr. AHC20BA)

For Aldehydes, organic acids, phenols, alcohols and ethers (e.g. THF), sealings made from FFKM and Kel-F are recommended. Existing pump heads can be adapted using rebuilt kits:

  • FFKM/Kel-F Rebuilt Kit for P2.1S/P4.1S with 10 ml pump head (Art. Nr. A5821-1) or 50 ml pump head (A5821-1)

For water, sapphire pistons are recommended. Existing pump heads can be adapted with the following rebuilt kit: 

  • Rebuilt kit for 10 ml pump head for aqueous eluents (A5823)


We separate molecules and unite people.

Based in Berlin, KNAUER has been serving the sciences since 1962. We develop and manufacture scientific instruments of superior quality for liquid chromatography systems and components, including:

Analytical HPLC / UHPLC
Preparative HPLC
Fast protein liquid chromatography (FPLC)
Multi-Column Chromatography / SMB

We are an established partner in science. Today and in the future.​​​​​​

Do you need more information?

Please contact us!

Follow us