7 Repairs
Carry out repairs, which should be performed
by qualified technical personnel, in line with the
safety notes:
n Cleaning a valve
n Replacing the diaphragm
All other repairs: Contact your responsible
ProMinent branch!
Replacing the diaphragm
Fig. 4
n If necessary take protective measures.
n Adhere to the safety data sheet for the
feed chemical.
n Ensure that the system is at atmospheric
pressure.
1. Empty the liquid end (turn the liquid end
upside down and allow the feed chem‐
ical to run out; flush out with a suitable
medium; flush the liquid end thoroughly
when using hazardous feed chemicals!)
2. Turn the stroke adjustment dial as far as
0 % stroke length when the pump is run‐
ning (the drive axle is then difficult to
turn).
3. Switch off the pump.
4. Unscrew the hydraulic connectors on
the discharge and suction side.
5. Remove the screws (1).
6. Loosen the dosing head (2) and the
backplate (4) from the pump housing (6)
- but only loosen!
7. Hold the pump housing (6) with one
hand and clamp the diaphragm (3) with
the other hand between the dosing head
(2) and the backplate (4).
8. Loosen the diaphragm (3) from the drive
axle with a gentle backwards turn of the
dosing head (2), diaphragm (3) and
backplate (4) in an anticlockwise direc‐
tion.
Repairs
15
Mahar Fan Abzar
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