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Sahara Air Products

What A Regenerative Dryer Is & How It Works

Types of Regenerative Dryers Slide

SAHARA Regenerative Air Dryers offer positive dew point


suppression to -40°F for excellent protection,


even under the most difficult conditions


of very low air line temperatures.



Unless your environmental and operating conditions are relatively uniform, moderate, and predictable enough to suggest a deliquescent type dryer, a SAHARA Regenerative dryer should be chosen to assure maximum protection for the system.


  • Virtually all free air contains water in the form of water vapor. We call it humidity. When air is compressed to 100 psi, the water vapor is concentrated to about 8 times normal!
  • Water vapor is no problem in compressed air until temperatures drop and condense it into droplets of water.
  • Then it combines with any other contaminants present and causes freeze-ups, leaks, and corrosion.
  • To protect your air system from damage caused by water, you must remove enough water vapor from your compressed air to bring its dew point down to a temperature lower than the compressed air will encounter at any point in the system.
  • A good air dryer is the answer.



To get clean, dry instrument quality air that means trouble-free


operation for your compressed air  system...


Choose a SAHARA Regenerative Air Dryer to fit your needs.


To find out more about how a regenerative dryer works and which model would be best for your needs, we have provided a Regenerative Air Dryer Presentation for your convenience.


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The topics covered in the presentation include:


  • Slide 1: Regenerative Dryer Terms
  • Slide 2: Types of Desiccant Dryers
  • Slide 3: How They Work
  • Slide 4: Activated Alumina Desiccant-Why Is It Used?
  • Slide 5: Methods of Regeneration 1
  • Slide 6: Methods of Regeneration 2
  • Slide 7: Methods of Regeneration 3
  • Slide 8: Types of Regenerative Dryers
  • Slide 9: Sources of Regenerating Power
  • Slide 10: Regenerative Dryer Performance
  • Slide 11: Sahara Electrical
  • Slide 12: Dew Point Demand System 1
  • Slide 13: Dew Point Demand System 2
  • Slide 14: Dew Point Demand System 3
  • Slide 15: Regenerative Dryer Sizing Factors
  • Slide 16: Determining Correct Dryer Size
  • Slide 17: Pressure Modifier
  • Slide 18: Temperature Modifier
  • Slide 19: Calculating Water Load
  • Slide 20: Vapor Pressure of Water
  • Slide 21: Calculating Air Velocity
  • Slide 22: Determining Air-to-Desiccant Contact Time
  • Slide 23: Calculating Pressure Drop
  • Slide 24: Determining Kilowatts Needed
  • Slide 25: Compressed Air Dryer Operating Cost Slide Chart
  • Slide 26: Calculating Annual Operating Cost for a Heatless Dryer
  • Slide 27: Calculating Annual Operating Cost for an Exhaust Purge Dryer
  • Slide 28: Calculating Annual Operating Cost for a Blower Purge Dryer
  • Slide 29: Calculating Annual Operating Cost for a Closed System Dryer


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     Regenerative Air Dryer Presentation


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