11.2
Replacing the diaphragm
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.
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!)
P_ALP_0012_SW
A
B
B
9
10
100
80
60
40
20
30
50
70
90
Fig. 8
3.
Set the eccentric disc (10) to "0".
The latched slide (9) cannot lock
in this position.
ð
The drive axle is then difficult to
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).
5a
6a
6
P_ALP_0013_SW
Fig. 9
Repairs
32
Summary of Contents for alpha ALPc 0230
Page 4: ...18 Declaration of Conformity for Machinery 49 Table of contents 4...
Page 50: ...50...
Page 51: ...51...