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Translation of the original instructions with installation instructions Pi 370 / Pi 3700, Filtration Group GmbH, 28.06.2020, Mat. No. 72412144, Version 06
Fig. 9:
Removing the filter element
Check all sealing points and seals.
Replace the seals if necessary.
Replace dirty disposable filter elements with new FG
elements (the order number on the name-plate must
match the order number on the element).
Clean the dirty wire cloth filter element
(refer to section 13.6).
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Carefully position the open side of the filter element in
the filter seat.
Place the filter housing in position, then screw it on anti-
clockwise as far as possible (NG 40 to 110: torque
60 Nm, NG 150 to 450: torque 100 Nm).
7
Screw in the drain plugs (torque: 30 Nm) (if any).
8
Operate the switch-over handle and shift it to the middle
position.
Tighten the vent screw as soon as fluid exits from the
vent hole without any bubbles (torque: 25 Nm).
Check that the filter is tight.
9
Make sure the switch-over handle contacts the stop and
is locked by the safety catch, so that the filter side that is
being maintained is deactivated (as indicated by the
pictogram on the handle).
After starting up one filter side, check that
all sealing points are tight.
Observe the duplex filter.
Does it operate normally?
13.5 Cleaning the filter housing
Wear protective clothing and equipment appropriate to
the hazard potential of the medium (e.g. eye protection,
respirator, protective clothing, etc.).
Open the filter and remove the filter element (refer to
section 13.4).
Remove any coarse impurities by mechanical means.
Wash out the filter housing in a suitable cleaning
solution.
13.6 Cleaning the wire cloth filter elements
Only wire cloth filter elements can be
cleaned. All other filter elements (PS / MIC)
must be replaced.
After starting up one filter side, check that
all sealing points are tight.
Defective seals must be replaced.
The system can never be cleaned one
hundred percent. The service life of the
filter elements is gradually shortened.
Ultrasonic cleaning
Immerse the dirty element upright in an ultrasonic bath
for approximately 90 to 120 minutes (turn it over if
necessary).
Rinse the filter element in clean cleaning solution (e.g.
naphtha).
Carefully blow out the filter element with compressed air
from the clean side to the outside.
Manual cleaning
Required for filter ratings coarser than 40
μ
m.
Remove coarse, external impurities with a brush dipped
in cleaning solution (e.g. naphtha).
Leave the filter element to stand for approximately 20
minutes in clean cleaning solution.
Then rinse it with cleaning solution from the clean side
to the outside.
Carefully blow out the filter element with compressed air
from the clean side to the outside.
* Wire cloth filter elements are not used to filter fuels in
maritime applications. Section 13.6 is only relevant if you
are using wire cloth elements!
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