Replacing The Diaphragm - ProMinent alpha ALPc 1001 Operating Instructions Manual

Repairs
11.2

Replacing the diaphragm

If necessary take protective measures.
n
Adhere to the safety data sheet for the
n
feed chemical.
Ensure that the system is at atmospheric
n
pressure.
1. Disconnect the pump from the mains
power supply.
2. 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!)
10
9
P_ALP_0012_SW
32
B B
A
Fig. 8
3. Set the eccentric disc (10) to "0".
The latched slide (9) cannot lock
in this position.
The drive axle is then difficult to
ð
turn.
4. Switch off the pump.
5. Unscrew the hydraulic connectors on
the discharge and suction side.
6. With PP types with bleed valve: Firstly
remove the bleed valve (grip), then lift
off the cover of the liquid end with a
screw driver.
7. Remove the screws (6a).
8. Fully remove the dosing head (6) from
the motor mount (2).
P_ALP_0013_SW
Fig. 9
5a
6
6a