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Purpose
Compressed air will be dehumidified by the dryer.
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Composition
1.Control box
2. Electronic timing sequence module.
3. Sequence lights display
- Drying Time
- Repressurization Time
4. Tower safety relief valves
5. ASME coded vessels (100 over model : option)
6. Tower pressure gauge
7. Purge pressure gauge
8. Pneumatic valves
9. Tower exhaust mufflers
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Principle of Operation
The Desiccant air dryer is specifically designed to remove moisture in vapor form. The dryer’s
Electronic Sequence Module is fully automatic, alternately cycling gas flow through the dryer’s
twin desiccant towers. Cycling between the two towers accomplishes the adsorption and
regeneration processes and provides a continuous flow of air.
The desiccant air dryer is charged activated alumina, composed of desiccant tower, pneumatic
valve, check valve, solenoid valve, and control panel.
The compressed air with moisture vapor enters a tower and flows upward through the desiccant
bed. The desiccant has great affinity for moisture vapor, therefore it adsorbs or removes moisture
from the air process is am exothermic process meaning heat is produced as moisture is
adsorbed on the desiccant surface.
At the end of the drying cycle, the desiccant in the tower is regenerated the moisture that the
desiccant adsorbed is removed by dry air.
A small portion of the dry gas is expanded to near atmospheric pressure by passing through an
orifice specifically designed for the regeneration(Purge) stream to strip the previously adsorbed
moisture vapor. The exothermic reaction from the previous drying cycle contributes to the
regeneration of the desiccant bed. The heat is picked up by the regeneration stream which in
turn increases the moisture adsorption capacity of the regeneration stream.
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2. General Descriptions
