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Maintenance of the double diaphragm pump
Proceed as follows as soon as the
slide rod is visible:
9.3 Maintenance of the ball valves
Before maintenance work
28
4.
Decontaminate the pump. Refer to the material safety data
sheet for the feed chemical.
5.
Dismantle the pump, as described in
nance of the diaphragm' on page 24 .
6.
Remove the slide rod (5) from its housing by pulling on one
end of the slide rod.
7.
Use a pair of snap ring pliers in the two openings (3) shown
in the drawing to remove the sleeve (2).
8.
Once the sleeve has been removed, remove the O-ring (4)
and the rectangular O-ring (1) on the inside of the pump
body.
9.
Clean and check all components.
10.
Replace all parts shown in the installation drawing.
11.
Re-assemble the pump, as described in
'Maintenance of the diaphragm' on page 24 .
An inspection or maintenance is normally indicated
if upon starting the double diaphragm pump:
primes badly
–
provides less capacity
–
cycles irregularly
–
–
cycles, but does not pump
1.
First close the suction line of the double diaphragm pump
2.
Close the discharge line of the double diaphragm pump
3.
Shut-off the compressed air supply
4.
Vent the double diaphragm pump
5.
Remove the air supply line from the double diaphragm pump
6.
If necessary remove any liquid which may remain in the
double diaphragm pump
ð Now the double diaphragm pump can be removed for
maintenance.
Ä Chapter 9.1 'Mainte‐
Ä Chapter 9.1
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