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[[File:Small_Heatless_Regens.jpg|thumb|200px|right|Small Heatless Regens]] | |||
[[File:Compact_Heatless_Regens.gif|thumb|200px|right|Compact Heatless Regens]] | |||
[[File:Mini_Heatless_Regens.jpg|thumb|200px|right|Mini Heatless Regens]] | |||
The '''Regens''' are used for drying air in [[Storage Tanks]] or [[Pneumatic Conveying Systems]] and are beneficial in the drying of hygroscopic (water-absorbing) resins. These [[Dryers]] remove water from the air by passing it through a desiccant that absorbs moisture. | |||
==Features== | |||
The Regens consist mainly of two cylinders containing desiccant, connected by a valve system. | |||
==Operation== | |||
When the desiccant in the first cylinder is saturated, the air flow can be switched to the cylinder containing the dried desiccant. | |||
==Dessicant Types== | |||
* Silica gel (an oxide of silica) | |||
* Alumina (aluminum oxide) | |||
* Calcium sulfate (the anhydrous form of gypsum). | |||
==Costs== | |||
==Most Expensive== | |||
Heatless Regens run a portion of dried compressed air through the previously utilized cylinder to extract moisture from its desiccant. | |||
==Least Expensive== | |||
Heated purge regenerative Regens use less air than the heatless variety in addition to heat, which helps the air carry away more water as it passes through the saturated desiccant. | |||
==Best Compromise== | |||
Heated blower purge regenerative Regens use air from outside the dryer that is heated and sent through the water-saturated desiccant for drying. | |||
==Types== | |||
There are different types of regenerative regens. These are: | |||
* Small Heatless Regens | |||
* Large Heatless Regens | |||
* Compact Heatless Regens | |||
* Mini Heatless Regens | |||