Maintenance | Operation Manual MIDIDOS E | 23
5. The diaphragm rod has to be greased with
Molykote Longterm W2, only in the area
of the bulkhead receptacle and along the
diaphragm thread.
6. The supporting plate
c
is turned onto the
arched side of the diaphragm and pushed
onto the thread support of the new dia-
phragm. (see Fig. 3)
7. Screw the new diaphragm
b
onto the sup-
port plate
c
clockwise, until it locks firmly
onto the diaphragm rod. The smooth side of
the supporting plate is then screwed onto the
end of the diaphragm rod. (see Fig. 4)
8. Install the dosing head
a
. Tighten the
screws crossways, e.g. upper left, lower right,
upper right, lower left. A tightening torque of
2 Nm is required for the dosing head screws
on the MIDIDOS E24...E72 and 6 Nm for the
MIDIDOS E120. (see Fig. 5)
IMPORTANT!
The diaphragm will not provide a tight seal if the
tightening torque is too low. The dosing head may
be damages if the tightening torque is too high.
9. After the connection of the dosing pipe, the
dosing pump is started up as described in
the “start up” section (chapter 9).
If the diaphragm is excessively worn, it can
lead to the possible causes described in
“trouble shooting” (chapter 13).
IMPORTANT!
Fig. 3
Fig. 4
Fig. 5
