ProMinent EMFa, Operating Instructions Manual

Page: 44 / 76

7.5 Replacing the diaphragm
B1244
1
2
3
Fig. 24: The open liquid end of the Evo mikro
1 Dosing head
2 Diaphragm package
3 Hydraulic block of the liquid end
1. Place a small tray or an oil cloth underneath.
2. Remove the dosing head from the liquid end.
3. If necessary: clean the parts of the liquid end.
4. Remove the new diaphragm package from its packaging, do not
deform it and immediately insert it in place of the old diaphragm
package.
5. Re-assemble the liquid end and tighten the dosing head screws
crosswise. Note
Ä
Tab. 6 ‘Torque stages for dosing head screws’
on page 44
and Fig. 25
6. Top up with oil.
Tab. 6: Torque stages for dosing head screws
Material
Displacement body 1st stage * 2nd stage 3rd stage 4th stage 5th stage 6th stage
Ø3 PTFE 5 Nm 10 Nm 20 Nm 60 Nm 120 Nm 120 Nm
Ø6 PTFE 5 Nm 10 Nm 15 Nm 25 Nm 50 Nm 50 Nm
Ø3 metal 5 Nm 10 Nm 20 Nm 60 Nm 120 Nm 120 Nm
Ø6 metal 5 Nm 10 Nm 15 Nm 25 Nm 50 Nm 50 Nm
* Minimum waiting time between two torque stages: > 2 minutes
B1275
Fig. 25: Sequence for tightening the dosing head screws for one stage
Maintenance
44