Air dryer is special types of filter systems
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Air dryer

Air dryer Introduction

Air dryers are special types of filter systems that are specifically designed to remove the water that is inherent in compressed air. The process of compressing air raises its temperature and concentrates atmospheric contaminants, primarily water vapor. Consequently, the compressed air is generally at an elevated temperature and 100% relative humidity. As the compressed air cools, water vapor condenses into the tank(s), pipes, hoses and tools that are downstream from the compressor. Water vapor is removed from compressed air to prevent condensation from occurring and to prevent moisture from interfering in sensitive industrial processes.
Excessive liquid and condensing water in the air stream can be extremely damaging to equipment, tools and processes that rely on compressed air. The water can cause corrosion in the tank(s) and piping, wash out lubricating oils from pneumatic tools, emulsify with the grease used in cylinders, clump blasting media and fog painted surfaces. Therefore, it is desirable to remove condensing moisture from the air stream to prevent damage to equipment, air tools and processes. The function of removing this unwanted water is the purview of the compressed air dryer.

Air dryer description

Advanced 3-in-1 compressed air dryer system features modes for pre-refrigeration, evaporation, and air and moisture separation to remove up to 90% of the moisture from your compressed air lines. When you prevent too much moisture in compressed air, you can avoid problems like corrosion of equipment and freezing of outdoor compressor air lines.
  • High efficiency pre-refrigeration system is three times faster, takes 60% less power to operate
  • Accommodates compressors up to 21.6 CFM, 140 PSI max
  • Lowers the dew point to 36°F

Air dryer Picture


Water contamination is an inherent byproduct of compressing atmospheric air. Because of this phenomenon, compressed air systems usually benefit from the addition of a compressed air dryer located on the output of the air compressor and/or at various locations throughout the distribution system. In most cases, the output of the compressor is processed through a primary dryer or system dryer. In cases where higher quality air is required the output of the primary dryer is further processed through a secondary dryer or polishing dryer.


  • A regenerative desiccant dryer typically delivers a dew point of between −40 °C (−40 °F) and −73 °C (−100 °F)
  • A refrigerated dryer delivers a dew point not lower than approximately 2 °C (35 °F)
  • A deliquescent dryer delivers a dew point suppression that fluctuates with air temperature. Typically this suppression is 11 °C (20 °F) below the compressed air temperature.
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