Knauer BlueShadow 40P, Инструкция по эксплуатации

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50 Maintenance and care
BlueShadow Pump 40P Instructions V7613
8.5.2 Check valves
Clogged check valves do not open and close properly. They cause pres-
sure fluctuations and irregular flow. If it is impossible to clean the check
valves, replace the whole unit.
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Removing the check valves
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Cleaning the check valves
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Installing the check valves
8.5.2.1 Removing the check valves
The pump head is equipped with two check valves.
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The pump head has been purged.
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The capillaries and tubings have been removed.
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The pump head has been removed.
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Open-end wrench, size 13
Procedure Process Figure
1.
Unscrew and remove the
capil lary connector
1
.
2. Loosen the outlet fitting
2
with the open-end wrench.
3. Remove the first check valve.
4. Loosen the inlet fitting
3
with
the open-end wrench.
5. Remove the second check
valve.
Fig. 20: Check valve in pump
head
Clean the check valves.
8.5.2.2 Cleaning the check valve
The check valves cannot be disassembled for cleaning but they are
cleaned as a unit.
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Both check valves have been removed.
Procedure Process
1. Place each check valve into a beaker with solvent, e.g. isopropanol.
2. Put the beaker with the check valve in an ultrasonic bath for at least
10 minutes.
3. Let the check valves dry afterwards.
Insert both cleaned check valves.
Procedure
Prerequisites
Tool
2
3
1
Next steps
Prerequisite
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