Knauer Azura V6840, Руководство пользователя

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P 2.1L user manual V6840, version
3. 5
36 Maintenance and Care
Tools Open-end wrench, sizes 10, 17
Next steps You can either replace or clean the check valves.
Cleaning the Check Valve
The check valves are not disassembled for cleaning but they are cleaned as a
unit.
1. Put the valve in a beaker with solvent e. g. isopropanol.
2. Put the beaker in an ultrasonic bath for at least 10 minutes.
Installing the Check Valves
Prerequisite

The pump head has been purged.

The capillaries have been removed.

The pump head has been dismounted.
Tools Open-end wrench, sizes 10, 17
Device defect
Damage to the pump head caused by overtightened capillary fittings. Note
the torque of the fittings.

Use 5 Nm torque for stainless-steel fittings.

Use 1 Nm torque for PEEK fittings.
Note: PEEK fittings can withstand pressures up to 400 bar for 1/16" and
200 bar for 1/8".
Note: The ball and position of the valves have been harmonized to each
other. Insert the valves in the direction of flow!
Process Figure
1. Unscrew the outlet fittings
1
.
2. Remove the check valve 2 .
3. Unscrew the inlet fittings 3 .
4. Remove the check valve.
Fig. 33 Removing the check valve
2
1
3
Procedure Process Figure
1. Insert the check valves 1 .
2. Manually screw in inlet and out-
let fittings and tighten them
with a torque wrench and the
respective torque.
Fig. 34 Check valve
2
1
3