34
15.720017-V6.0
DMX model 226 en
9.4
Exchanging the Diaphragm
!
WARNING
Wear protective gloves and glasses when carrying out
work on the dosing head, connections or lines!
CAUTION
Adjust the stroke length only while the pump is
running!
Danger of damage.
●
While pump is running set the stroke length adjustment knob to 100%.
●
Switch off pump and disconnect from power supply.
●
Loosen the 6 dosing head screws.
●
Remove the dosing head.
●
Turn the fan blades until the diaphragm reaches the front dead center
(diaphragm detaches itself from diaphragm flange).
●
Unscrew the diaphragm by manually turning it to the left.
●
If necessary, place the O-ring, intermediate ring and support disk.
●
Screw in the new diaphragm completely, then rotate back until the holes in
the diaphragm and flange coincide.
●
Turn the fan blades until the diaphragm reaches the bottom dead center
(diaphragm is pulled onto the diaphragm flange).
●
Place the dosing head carefully and tighten the screws crosswise.
Max. torque: 6 Nm.
●
Deaerate the dosing pump and commission it.
CAUTION
After initial start-up and after each diaphragm
exchange, tighten the fixing screws of the dosing
head:
After approx. 6 to 10 working hours or two
days, tighten the dosing head screws crosswise using
a torque wrench, torque 6 Nm.
