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6
4
Fig. 13: Maintenance of the ball valves
After maintenance work
1
3
2
5
1.
Remove the screws (1 ... 6) to remove the directional valve.
Mark the alignment of the directional valve.
2.
Remove the inlet and outlet connectors. Note the alignment
of the connecting pieces.
3.
Check the surfaces of the valve balls and valve seats for
wear and damage.
ð Replace worn or damaged parts.
4.
Install a new set of valve balls and/or valve seats.
5.
Once the valve seats and seals have been installed, then the
seals must be evenly visible.
6.
Tighten the 6 screws in the sequence 1 ... 6, as shown in
Fig. 13.
1st stage: Sequence 1 ... 6, manually tighten.
n
2nd stage: Sequence 1 ... 6, tighten to 5 Nm.
n
7.
Check all seals and O-rings for consistent and undamaged
installation.
1.
Attach the air supply line to the double diaphragm pump
2.
Open the compressed air supply
3.
Open the discharge line of the double diaphragm pump
Maintenance of the double diaphragm pump
A2734
29
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