7.6.8 Clean the pump head check valves
Maintenance interval
Clean the check valves when required, for example if solids in the check valve cause irregular or low
flow. The cleaning procedure is the same for the system pumps and the sample pump.
Required material
The following materials are required:
•
Adjustable wrench
•
Methanol
•
Distilled water
•
Ultrasonic bath
Instruction
Follow the instructions below to remove and clean the pump head check valves.
ActionStep
Switch off the instrument.1
Disconnect the tubing from the pump head and disconnect the pump inlet tubing. Dis-
connect the tubing of the pump rinsing system.
2
Unscrew the purge valve by turning it counter-clockwise, and lift off the metal ring.3
296 ÄKTA pure User Manual 29119969 AB
7 Maintenance
7.6 Maintenance when required
7.6.8 Clean the pump head check valves
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