An adsorption dryer dries air by pushing it through a tower filled with desiccant or hygroscopic material. This material adsorbs the moisture in the air, leaving only dry air to exit the dryer. Because the desiccant gets saturated, adsorption dryers consist of two towers. While air is being dried in one tower, the other tower is being regenerated after use. This process prepares the desiccant for a new drying cycle.

Adsorption dryers can reach pressure dew points as low as -70°C/-94°F. That makes them the ideal solution for applications that require very dry air. They also prevent air system ice formation in very cold climates. As with all compressed air dryers, energy efficiency and thus operational costs are a key consideration. That is why it is important to take into account the regeneration technology of a dryer. It can make a significant difference in your operational costs. Heatless dryers use expanded compressed air (and thus some of the dryer’s capacity) for regeneration. Heated purge dryers heat up the expanded purge air to limit this purge flow. Blower purge dryers use ambient (not compressed) air and an electric heater. Their zero purge variants also eliminate purge loss during cooling.

Of course, the desiccant material itself also determines efficiency. Pneumatech carefully selects its desiccant from premium suppliers. This selection is based on crushing strength, water resistance, anti-aging effect, and a revolutionary new technology. In addition, Pneumatech has recently introduced a revolutionary new type of desiccant. What makes it unique is that is made of solid, structured blocks rather than a mass of loose beads. Its straight tubes ensure a much more efficient air flow to offer significant energy savings and a 40% longer lifetime.