What are air dryer manufacturers?

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What are air dryer manufacturers?
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• A system or piece of equipment called an air
  drier is used to remove moisture from the air,
  significantly compressed air. The relative
  humidity of ambient air is usually between 30 and
  50. However, air that has been compressed has
  more moisture in a smaller volume. As a result,
  the surplus moisture that cannot be retained
  condenses, raising the relative humidity to
  100. 
• The high moisture content of air harms plant
  performance and the dependability of equipment
  downstream. It may cause equipment corrosion,
  early instrument failure and wear, contaminating
  the process stream, and other issues.