ProMinent Sigma X Operating Instructions Manual page 72

Repair
Checking the condition of the diaphragm
rupture sensor
72
12. Should this not work, remove dirt or swarf from the thread and
screw the diaphragm correctly onto the drive axle this time.
ð If this is still unsuccessful, contact ProMinent-ProMaqua
Service.
13. Place the dosing head with the screws onto the diaphragm - the
suction connector should be pointing downwards when the pump is
subsequently installed.
14. Tighten the screws gently to start with.
15. Screw the diaphragm rupture sensor into the dosing head.
16. Start 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!
– Re-check the tightening torques quarterly with PP,
PC and TT dosing heads!
1. Replace the diaphragm rupture sensor if its inside has become
damp or dirt has penetrated it.
7 6 5
Fig. 37: Section through the Sigma diaphragm rupture warning system
("Visual rupture indicator" design)
1 Working layer (≙ operating diaphragm)
2 Safety layer (≙ safety diaphragm)
3 Flap
4 Piston
5 Diaphragm rupture sensor
6 Cylinder, red
7 Cover, transparent
2. If the piston of the diaphragm rupture sensor - see Fig. 37, item 4 -
should have become dirty or damp, clean both it and the hole in
which it runs.
3. Check whether the piston can move freely in the hole.
2
1
4 3
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