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© Gardner Denver Schopfheim GmbH, Gardner Denver Deutschland GmbH
Maintenance and repair
U
s
1
f
1
D
f
2
g
2
h
2
7.2.1 Air filtering
NOTICE
Insufficient maintenance on the air filter
The power of the machine lessens and damage may
occur to the machine.
Intake air filter:
The micro filter (Fig. 4/f
1
) must be cleaned by rinsing
out or purging or replaced more or less often de-
pending on how dirty the discharged medium is.
Remove the suction flange (Fig. 4/D) after undoing
the screws (Fig. 4/s
1
).
Also check the valve seating for contamination.
Re-assemble in reverse order. After that check the
function of the valve. For this purpose fit a shut-off
device (enclosed volume min. 1 litre) on the suction
side and starts vacuum pump shortly. Afterwards
the vacuum achieved must remain constantly.
Gas ballast valve filter:
The pumps work with a gas ballast valve (Fig. 2/
U, 4/U).
The inbuilt filter cartridge(Fig. 5/f
2
) must be cleaned
more or less often depending on how dirty the medi-
um flowing through is. By undoing the countersunk
screw (Fig. 5/g
2
) and removing the plastic cover
(Fig. 5/h
2
) the filter parts can be removed for clean-
ing.
Clean the filter cartridge (Fig. 5/f
2
) by purging or re-
place it.
Re-assemble in reverse order.
Fig. 4 Air filtering
D
Suction flange
U
Gas ballast valve
f
1
Micro filter
s
1
Screws
Fig. 5 Gas ballast valve
h
2
Cover
f
2
Filter cartridge
g
2
Countersunk screw
