GE AKTA avant Operating Instructions Manual page 175

Step
7
8
9
10
11
ÄKTA avant Operating Instructions 29101556 AB
Action
Unscrew the lower check valve using an adjustable wrench.
WARNING
Hazardous substances. When using hazardous
chemicals, take all suitable protective measures, such
as wearing protective clothing, glasses and gloves re-
sistant to the substances used. Follow local and/or
national regulations for safe operation and mainte-
nance of the product.
Immerse the valves completely in methanol and place them in an ultrasonic
bath for a few minutes. Repeat the ultrasonic bath with deionized water.
Refit the check valves.
Tighten the nut until fully finger-tight and then use the adjustable wrench
to tighten a further 90 degrees.
Refit the inlet manifold and reconnect the tubing to the pump head.
7 Maintenance
7.5 Clean pump head check valves
175