D r y e r O p e r a t i o n
6
The inlet wet compressed air enters the dryer and is directed into tower “A” through the switching
valve. The wet air passes through the desiccant bed while the activated alumina strips moisture
leaving dry service air. A portion of this extremely dry air is passed through the fixed orifice shuttle
check valve and flows downward through tower “B” drying out the saturated desiccant and exhaust-
ing out of the purge muffler.
This “REGENERATING OPERATION” is actually two cycles: one for drying service air, and one for dry-
ing desiccant. After approximately five minutes, the switching valve redirects flow, repeating the
cycle. These cycles are reduced to two minute cycles if the -100ºF dew point is selected.
Required purge air is generally 15% of rated flow.
All Arrow Pneumatic Mini-Regen Dryers have less than a 2 PSIG
Maximum Pressure Drop at standard conditions.
•
Your Arrow Dryer will give you years of service if the filters and drains ahead of
the dryer are properly maintained on a manufacturers recommended schedule.
•
Arrow also suggest replacing the desiccant in the vessels approximately every
three (3) years.
•
Operating conditions will have to be taken into consideration and the schedule
adjusted accordingly.
NOTE: BEFORE MAINTENANCE OF DRYER ALWAYS SHUT DRYER
OFF, DISCONNECT THE ELECTRICAL SUPPLY, AND DEPRESSURIZE
THE PNEUMATIC SYSTEM TO AVOID PERSONAL INJURY
DRYER OPERATION
MAINTENANCE
