Desiccant dryers make wonderful air dryers for any season. Shop All Activated Carbon Desiccant Dryers
Silica Gel Desiccant
Because they don't rely on a reduced dew point like refrigerated dryers do, they can actually filter moisture in temperatures as cold as -100 degrees Fahrenheit.
There are a couple different types of desiccant used in these dryers. You may be best suited with one over the other depending on your application.
Another very effective desiccant used is activated carbon. This is a very porous material with increased surface areas.
Activated carbon is more resilient than silica gel, and so it can be regenerated and reused rather than continuously replaced.
With two towers containing activated carbon, a desiccant dryer can actually regenerate one tower while using the other to adsorb incoming moisture. This creates a continuous cycle that makes the dryer very reliable.
The desiccant most commonly used is silica gel. Silica is what comes in the little paper pouches found in packaging, but in this case there's a lot more of it.
As the incoming air is passed through the silica gel, the moisture sticks to the surface of the many small pours contained in it. This process is called adsorption
When the silica has become fully saturated, it generally changes color, indicating that it needs to be replaced.
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