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Portable Air Dryer for 185 and 375 CFM Diesel Air Compressors

10/12/2025

We are asked how to remove water from our 185 or 375 cfm portable diesel air compressor.

DryAIR aftercoolers are currently available in two different sizes as well as Tongue-Mount and Freestanding / Portable versions. Tongue-Mount units are easy to install and make a valuable addition to Doosan / IR portable compressors. They can easily be retrofitted to mount on various other brands as well. Freestanding units are designed to withstand the rigorous demands of the construction industry and can be used on any gas or diesel compressor when sized correctly.


The DryAIR 250FS Classic has been design as a stand-alone aftercooler for portable gas and diesel compressors. It delivers quality air to equipment, free of harmful condensed moisture. DryAIR will cool your compressed air to within 20° of ambient temperature.

  1. On a 60°F day, 13.4 gallons of water will enter a 185 CFM compressor in an 8-hour shift.
  2. Using a DryAIR 250 removes 85% (11.3 gallons) of water from the compressed air supply.
  3. The remaining 2.1 gallons will turn to harmless vapor down to a 28°F atmospheric dew point.


The DryAIR 250TM has been designed as an add-on aftercooler for portable gas and diesel compressors. It delivers quality air to equipment, free of harmful condensed moisture. DryAIR will cool compressed air to within 20° of ambient temperature.


The DryAIR 400FS/TM has been designed as a stand-alone or tongue-mount aftercooler for mid-size portable diesel compressors. It delivers quality air to equipment, free of harmful condensed moisture. DryAIR will cool compressed air to within 20° of ambient temperature.


DryAIR works by effectively removing harmful moisture from the discharge air of portable gas and diesel compressors.


DryAIR units deliver cleaner compressed air, resulting in better working blast media and virtually no contamination on blast surfaces. Primer and paint adhere better, without fish-eye and troublesome spotting on finish coats.


Moisture is a poor lubricant and causes premature failure of paving breakers, jackhammers, rivet busters and related air tools. DryAIR will make a significant difference in prolonging the life of your tools.



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