Operating instructions

ð
If this is still unsuccessful, contact ProMinent-ProMaqua cus‐
tomer service.
12. Place the dosing head with the screws onto the diaphragm - the
suction connector must be pointing downwards in the pump's fitting
position.
13. Tighten the screws gently to start with.
14. Screw the diaphragm rupture sensor into the dosing head.
15. Start up the pump and adjust the stroke length to 100 %.
16. Stop the pump and tighten the screws crosswise. Tightening torque
- see
Ä “Tightening torques” on page 32 .
17. Start the pump and at maximum pressure, check for leaks.
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!
4
2
1
5
3
13
P_SI_0038
Fig. 26: Cross-section through the liquid end
1 Suction valve
2 Metering diaphragm
3 Discharge valve
4 Dosing head
5 Backplate
13 Safety diaphragm
Repairs
37