Replacing The Diaphragm - ProMinent Hydro 2 Series Operating Instructions Manual

Repair
10.2

Replacing the diaphragm

Important note
Drain the hydraulic oil from the hydraulic
end
Changing the diaphragm for HP2 and HP3
62
Please note, however, that when assembling, the valve
seat (3) must be aligned in the other direction. The fine
machined side must point in the direction of flow with all
valve seats (3).
WARNING!
Observe the safety information at the beginning of the
chapter.
CAUTION!
A diaphragm rupture may remain unnoticed
Should the multi-layer diaphragm be handled incorrectly,
the diaphragm rupture warning system may fail.
– Take the multi-layer diaphragm from the packaging
immediately before installing it.
– Do not allow dirt to come into contact with the multi-
layer diaphragm.
– Do not "inspect" the insert discs.
With the double head versions and add-on power ends, perform the fol‐
lowing work simultaneously on both dosing heads.
Position numbers - refer to the "Maintenance" chapter
1. Turn the stroke adjustment dial (2) more than 100% to the stop.
2. Unscrew the gearbox vent stopper (3).
3. Place an oil trough under the hydraulic end.
4. Unscrew the oil drainage stopper (4) out of the hydraulic end.
5. Allow the hydraulic oil to run out of the hydraulic end.
6. Screw in the oil drainage stopper (4) with a new seal.
Fig. 18
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