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Compressed air filter series GL
Cleaning the float drain
Hazard due to a sudden release
of pressure!
Depressurise the filter before carrying
out any work on the filter! A sudden
escape of pressure may cause seri-
ous injuries.
- Block compressed air supply to the filter.
- Depressurise the filter by pressing the
drain valve of the float drain upwards until
all the condensation drains off and a flow
sound can no longer be heard. (Picture 3).
- Give the lower housing a full turn in clock-
wise direction and take it off downwards
(Figure 5).
- Replace seal (Figure 6).
- Use an open-ended spanner to release the
lock nut and remove the float drain out of
the lower housing (Fig. 9).
- Insert a new or the cleaned float drain into
the lower section of the housing.
- Fit the lock nut beneath the filter on the
float drain and tighten with an open-ended
spanner.
)
Do not overtighten the float drain
(max. tightening torque 2 Nm)
otherwise the filter could leak!
- Apply a thin coat of grease on the thread
of the lower housing.
- Using the marks, vertically align the lower
section with the upper section of the
housing and fully close off with one com-
plete turn (Figure 8).
- Open the supply line to the filter.
- Check the filter for tightness. The float drain
closes at an operating pressure of 1.5 bar.
GL2-19_Int1_04
Operating Instructions | EN
Remedy for malfunctions
Differential pressure gauge
After a pressure peak, e.g. when a valve was
opened abruptly, the needle of the differen-
tial pressure gauge is locked. The needle is
behind the stop in the red area.
Warning!
Make sure to check the filter element
since it may have been damaged.
Replace any damaged element.
Replacement of the filter element see
page 22.
After testing the filter element you must
reset the needle of the differential pressure
gauge:
- Carefully pry out the viewing glass on the
side of the stop pin with a screwdriver.
- Carefully lift the needle and move it back
over the stop.
- Insert the viewing glass again and push it
in until it is firmly seated.
Poor filtration performance
When the filtration performance is insuf-
ficient even with a new filter element,
incorrectly chosen conditions of application
or flow rates can be the reason. Contact
your sales partner to find a solution in such
a case.
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