Knauer Azura P 6.1L, Руководство пользователя

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KNAUER P 6.1L User Manual V6890 Version 1.2
52 Maintenance and Care
Next steps Clean the check valves.
Cleaning the Check Valves
In order to be cleaned, the check valves are not disassembled
but are cleaned as a whole.
Prerequisite Both check valves have been removed.
Next steps Insert both cleaned check valves.
Installing the Check Valve
Insert the check valves in the direction of the flow. The notch of
the check valve points downward.
Normal phase Insert the check valves in the direction of the flow. The arrow on
the check valve points upward.
Prerequisite The check valves have dried.
CAUTION!

Damage to components caused by overtightened
fittings!

Note the torque of the fittings:

- For stainless-steel fittings: 5 Nm

- For PEEK fittings: maximum 1 Nm or finger-
tight and an additional quarter of a turn with
appropriate pliers.
Procedure Process Figure
1. Unscrew and remove
the capillary connector
1
.
1. Loosen the outlet fit-
ting
2
with the open-
end wrench.
2. Remove the first check
valve.
3. Loosen the inlet fitting
3
with the open-end
wrench.
4. Remove the second
check valve.
Fig. 36 Check valve in pump
head
2
3
1
Procedure Process
1. Place each check valve into a beaker with solvent, e.g. iso-
propanol.
2. Put the beaker with the check valve in an ultrasonic bath
for at least 10 minutes.
3. Let the check valves dry afterwards.