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2. Visual inspection of the silica gel
Check The loading condition of the silica gel must be determined by visual inspection of the
adsorber. The colour orange indicates that the silica gel can still adsorb water and air is
dehumidified. When the silica gel is completely saturated, the colour changes to green or
colourless.
If there are oil particles on the silica gel, these close the pores and the adsorption capacity
is reduced. This causes the silica gel to discolour more slowly and unevenly.
Cycle Half-yearly
Measures If the silica gel is loaded or damaged by oil, a new spare parts kit or a new adsorber with
fresh silica gel should be used.
3. Check filter unit for impurities
Check Take off the lid and remove the activated carbon disc. Then empty the desiccant. The filter
unit can then be removed. This should be checked for contamination and should be free of
dirt for smooth operation.
Cycle Half-yearly
Measures The filter element is part of the spare parts kit and should be replaced if it is contaminated.
4. Visual inspection of the adsorber
Check The adsorber must be checked visually for damage. Damage can occur due to various
environmental or operating conditions.
Zyklus Yearly
Measures If the adsorber is damaged, it must be completely replaced to ensure full functionality.
5. Replacing the wearing parts
Check The wearing parts, in particular the seals, the silica gel as well as the adsorber housing,
must be checked with regard to their condition.
Cycle Every two years
Measures Regardless of the result of the test, it is recommended to replace the wearing parts by
using a spare parts kit or a new adsorber to ensure smooth operation.
