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A190-930TX_EN_03_ 2009-02-06
Preliminary and afterfilter
The installation of suitable preliminary filters is recommended for these reasons:
Removal of dirt or oil particles contained in the compressed air to prevent
contamination of the desiccant.
Elimination of large water droplets and thus prevention of unnecessary use of
desiccant.
Extension of service life of desiccant.
Preliminary filters should be installed as close to the dryer as possible. The pipe
feeding the air to the preliminary filter should be at a slight slope.
It is recommended to install an afterfilter behind the dryer to prevent
contamination of the dried compressed air with desiccant particles.
Condensate drain systems for preliminary and afterfilter
Condensate drain systems are installed to drain water that has collected in the
preliminary or afterfilter from the filter. There are two distinct types of condensate
drain system, namely level-controlled systems and time-controlled systems.
