Desiccant Air Dryers

The Aircel AHLD (80-5,000 scfm) heatless adsorption compressed air dryer is based on the traditional twin-tower concept. Aircel is one of few dryer manufacturers with the engineering and manufacturing capability and experience to design dryer systems of any size with pressures up to 10,000 psig and volumes up to 20,000 scfm. The AHLD can be designed to meet NEMA 1, 4, 7 and 12 requirements as well as to national and special industry codes. The auxiliary-piloted, two-way, angle-body piston valve provides extended service life and carries a 10-year warranty (80-600 scfm models).

Heatless desiccant dryers, like all adsorption type dryers, use a desiccant to adsorb the water vapor in the airstream. In the most commonly used twin-tower design, one tower dries the air from the compressor, while the desiccant in the other tower is being regenerated to provide continuous operation. In the heatless desiccant dryer design, no internal or external heaters are used. Regeneration is achieved by using a partial stream of the dried air, expanding it to atmospheric pressure, and running it through the desiccant bed that is being regenerated. The standard regenerative desiccant dryer at 100 psig has a standard pressure dew point rating of -40°F and a dew point down to -100°F is available as an option.