9.3 Change the diaphragms and valves
NOTICE
Property damage from incorrect installation
Change in dead volume due to incorrect installation of the original spacer disks impairs the final vac-
uum or leads to bearing damage.
► During disassembly, keep the existing spacer disks separate per installation location.
► Reinstall the same number of original spacer disks per diaphragm head.
9.3.1 Dismantle the diaphragm head and valves
Required tools
● Open-end wrench,
WAF 14
● Allen key,
WAF 4
A – D
2
1
3
4
5
6
7
8
Fig. 10:
Diaphragm head and valves
A – D Diaphragm head cover
5
Intermediate plate
1
Banjo bolt
6
Diaphragm
2
Cylinder screws
7
Spacer disks
3
Valve plate
8
Silencer
4
Sealing ring (only on diaphragm head A)
Procedure
1. Remove the banjo bolts and dismantle the hose connection.
2. Rotate the diaphragm pump so that the diaphragm head to be dismantled is facing upwards.
3. Unscrew cylinder screws from the diaphragm head.
4. Remove the diaphragm head.
– Observe the sealing ring on the intake side.
5. Remove the intermediate plate.
6. Release the valves and the sealing ring from the intermediate plate.
Maintenance
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