User manual

58 Bio-inert Quaternary Pump User Manual

5 Optimizing Performance

When to use the Seal Wash Option

Highly concentrated buffer solutions will reduce the lifetime of the seals and

pistons in your pump. The seal wash option allows to maintain the seal

lifetime by flushing the back side of the seal with a wash solvent.

The seal wash option is strongly recommended when buffer concentrations of

0.1 M or higher will be used for long time periods in the pump.

The seal wash option comprises a support ring, secondary seal, gasket and

seal holder for both piston sides. Place a wash bottle filled with 90 % water /

10 % isopropanol above the pump in the solvent cabinet. The peristaltic pump

moves a flow through the pump head removing all possible buffer crystals

from the back of the pump seal. This mixture prevents growth of algae or

bacteria in the wash bottle and reduces the surface tension of the water.