Desiccant Air Dryers by OMI

Discover our range of highly efficient adsorption compressed air dryers, featuring unique energy-saving design solutions.


When it comes to managing moisture in compressed air dryers, OMI’ desiccant products are unparalleled in performance. We offer an extensive range of adsorption air dryers, including heatless and heated models with airflow rates reaching up to 14900 m³/h. Continue reading to get to know how our high-performance products can help you outrun your competitors.


With OMI's innovative desiccant air dryer technology, you can protect your equipment from corrosion, avoid costly downtime, and maintain product excellence. Our adsorption air dryers are the cornerstone of high air quality, especially in applications where excess moisture is highly unwanted. They can deliver low and steady pressure dew points of -20°C, -40°C, or even an impressive -70°C.


What are Desiccant Dryers?

Desiccant air dryers are essential for drying the incoming air in compressed air systems. They feature dual towers filled with hygroscopic materials with a high adsorption capacity. They efficiently remove moisture from compressed air, preventing condensation-related issues like corrosion or product damage.


How Do Heatless Desiccant Air Dryers Work?

OMI's heatless air dryers use a twin tower system with advanced desiccant materials to remove moisture. While one tower is drying the incoming compressed air, the other is being completely regenerated, using a heat-of-compression dryer to purge air and prepare the desiccant for its next cycle. This design ensures a constant supply of dry compressed air with seamless, automated transitions between the drying and regeneration phases.

Even though these models are more compact, they still ensure the air is pure and the system works efficiently, resulting in a superior capacity-footprint ratio, saving users significant amounts of floorspace.

OMI's Heatless Air Dryers

OMI's heatless desiccant dryers provide consistently dry air, perfect for places where heat can’t be used. These units are not only more affordable at the start, but also cost less to keep up over time, all while meeting high standards for air dryness. Though they have a smaller air capacity, they can handle a wide range of air flow rates and moisture levels, fitting different industrial needs.

Key Benefits:

  • Cost Savings: More budget-friendly to buy and cheaper to keep running compared to heated desiccant dryers.
  • Simple Installation: Straightforward to install and use, making integration a breeze.
  • Steady Performance: Always give you high-quality dry air that reaches tough purity levels.
  • Flexible Choices: Comes in various models to match the demands of any operation size.


How Do Heated Desiccant Air Dryers Work? 

 Heated desiccant air dryers from OMI are stronger than heatless models since extra heat is added to the drying process to speed it up. These dryers come in two types: externally heated and internally heated, and they can deal with more moisture, which is perfect for operations that need continuous supply of dry air. Their design with two towers makes sure there's a steady flow of dry compressed air, which is essential for effective application. 

OMI's Heated Air Dryers

Ideal for industries like chemical production and electronics, OMI's heated desiccant air dryers provide a steady stream of dry air for processes that can't handle moisture. These dryers come in different models to fit various air flow needs and working conditions. With settings that let you choose the moisture level, these dryers give you a non-stop supply of top-quality dry air for many industrial uses.  

Key Benefits:

  • Energy Efficiency: Uses less air to refresh, which means they use less energy over time. 
  • Superior Moisture Handling: Great at removing moisture, perfect for applications with strict humidity control needs. 
  • Customizable Dryness: You can change the settings to get the exact dryness level your industry needs.
  • Quick Regeneration: Some models have blowers that speed up the desiccant refresh process, which translates to fast recovery and non-stop work.  

Comparison of Heatless and Heated Desiccant Air Dryers 



Heatless Desiccant Air Dryers 

Heated Desiccant Air Dryers 

Initial Cost 





More complex 




Energy Efficiency (low demand) 



Energy Efficiency (continuous) 



Purge Air Loss 

Higher (up to 15%) 

Lower (around 7-8%) 



More demanding 

Dew Point Achievement 


Lower dew points achievable 


Better for low to medium demand 

Better for high continuous demand 

Regeneration Control 

Less precise 

More precise