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Checking the condition of the diaphragm
rupture sensor
12.
Should this not work, remove dirt or swarf out of the thread and
screw the diaphragm correctly onto the drive axle this time.
ð If this is still unsuccessful, contact ProMinent-ProMaqua cus‐
tomer service.
13.
Place the dosing head with the screws onto the diaphragm - the
suction connector should be pointing downwards in the pump's fit‐
ting position.
14.
Tighten the screws gently to start with.
15.
Screw the diaphragm rupture sensor into the dosing head.
16.
Start up the pump and adjust the stroke length to 100%.
17.
Stop the pump and tighten the screws crosswise. Tightening torque
- see .
18.
Start the pump and check for leaks at maximum pressure.
CAUTION!
Warning of escaping feed chemical
The liquid end may leak should it not be possible to
check the tightening torque of the screws.
–
Check the tightening torque of the screws after 24
hours of operation!
–
With PP, PC and TT dosing heads also re-check the
tightening torques quarterly!
1.
If the inside of the diaphragm rupture sensor has become damp or
dirt has penetrated it: replace.
7
6
5
Fig. 24: Section through the Sigma diaphragm rupture warning system
("Visual break indicator" version)
1
Working layer (≙ operating diaphragm)
2
Safety layer (≙ safety diaphragm)
3
Flap
4
Plunger
5
Diaphragm rupture sensor
6
Cylinder, red
7
Cover, transparent
2.
If the piston of the diaphragm rupture sensor - see Fig. 24, item 4 -
should have become dirty or damp, clean both it and the hole in
which it runs.
Carrying out repairs
1
2
4
3
P_SI_0020_SW
59
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