1
Remove the intake cap.
Carefully observe the flow arrow indicator on the filter.
Air should flow in the direction of the arrow.
2
Remove the compression fitting from the intake side
of the filter.
3
Install the nut,
front ferrule, and
back ferrule over
the short stain-
less steel pipe.
Be sure the tube is fully seated in the filter. Tighten the
fitting to hand tight, then about ½ turn more using
9/16" and 1" wrenches.
4
Install the nut,
front ferrule, and
back ferrule on
the intake tube.
5
Install the inlet cap.
Maintaining the Filter
How do you know when to clean the filter? Dust will accu-
mulate in the filter over time. The rate of dust accumulation
will depend upon the amount of dust in the air and the
particle size of dust. Therefore, it is difficult to predict
exactly when the filter should be cleaned.
As dust builds up in the filter, the flow module will use
more power to maintain the flow rate. So, the best indicator
of the filter status is a change in the power required to run
the flow module. When you install a new filter, record the
Flow Drive (%), or log that variable with your data. Over
time, compare the flow drive % with the initial value. The %
will increase as the filter becomes clogged, indicating that
the pump must work harder to move air through the filter.
Clean the filter before the Flow Drive (%) exceeds 90%.
Cleaning:
If possible, use an ultrasonic water bath, then
back-flush the filter with compressed air and allow the filter
to dry before reinstalling. Otherwise, immerse the filter in
boiling water for a few minutes or soak it over night and
then back-flush it with compressed air. As a good practice,
clean the intake cap whenever you clean the filter.
The ferrules/compression fittings do not need to be removed
from the intake tubes when the filter is removed. They can
be reused.
Insulated Intake Tube Specifications
Outside Diameter:
0.25" (6.35 mm)
Inside Diameter:
0.21" (5.334 mm)
Wall Thickness:
0.020" (0.51 mm)
Length:
40" (101.6 cm)
Intake tube path length when assembled:
102 cm
Intake tube path length with Swagelok® filter:
106.5 cm
Material:
304 Stainless Steel
Figure 1
. Dimensions for the intake tube and cap (A) and
the intake filter assembly (B).
©2017 LI-COR, Inc. 05/17
984-14359 Rev 3
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