COMPRESSED AIR TREATMENT & AIR DRYERS

Air & Water

All atmospheric, or ambient air contains moisture in the form of water vapour, which will condense into liquid water when the air cools to its saturation point, or dew point, the point where it can no longer hold water vapour.

The amount of moisture in ambient air depends upon its temperature and relative humidity. The warmer the temperature, the more moisture ambient air can hold. A rule of thumb is that the amount of moisture air can contain at a saturated condition doubles for every 20ºF/7ºC increase in temperature.

This means that the amount of potential condensate present in air is greater in summer than in winter, during the day than at night, and in warmer locations like the Southern US, versus colder locations like Canada.

 

 

What Happens & How Air Dryers Help

When ambient air is compressed, a considerably amount of heat is produced in the process. As this hot, compressed air exits the air compressor and travels through the distribution system, the compressed air cools down to ambient, or room temperature. This causes the water vapour in the compressed air to condense into liquid water in the distribution system.

Compressed air dryers cool down compressed air to a temperature where moisture in the compressed air is condensed into a liquid state, and consequently removed from the compressed air distribution system. It is critical that the air dryer dries the air at a dew point temperature below the lowest temperature to which the compressed air will be exposed. Incorporating an air dryer for your particular application will ensure the delivery of dry, cool compressed air to your compressed air distribution system.

 

Dry, Cool Air is Critical for Most Applications

So why is the treatment of compressed air important? Dry, cool air is critical in many applications, as well as essential in ensuring an air system’s reliability and efficiency.

Employing an air dryer ensures the delivery of dry, cool compressed air, preventing moisture from reaching sensitive areas downstream from the air compressor and damaging pneumatic equipment and tools, as well as ensuring production quality standards are not compromised.

Dry, cool air is critical for applications such as auto body collision repair shops because the end product is directly affected by the quality of compressed air.
Compressed air delivered directly from an air compressor is usually not suitable for its intended use due to many factors:

  • The discharge temperature from the air compressor may be too high for distribution & use and this hot, compressed air contains moisture that will ultimately condense into liquid as it cools travelling through the distribution system.
  • Water accumulation on the inner surfaces of pipes and fittings also causes an increase in pressure drop. A loss of pressure is a loss of energy used to compress air.
  • In addition to satisfying an applications particular compressed air requirements, dry, cool, clean air most likely always results in lower operating costs.

We can see that compressed air treatment is critical in ensuring an efficient and effective compressed air system.

Standard Temperature Dryers

Let’s discuss the features and benefits of the ProDry® ASD refrigerated air dryer (used with rotary screw air compressors). It’s a standard temperature air dryer with a maximum air inlet temperature of 120ºF or 48ºC. It is microprocessor controlled and maintains a stable dew point.

Features & Benefits:

  • An energy-efficient variable speed fan, aligning energy use with air demand.
  • A two-way heat exchanger, which improves efficiency and energy savings.
  • A high-efficiency, stainless steel moisture separator, promoting a low pressure drop and smooth operation.
  • A patented refrigerant circuit design, which adjusts cooling capacity to air volume and temperature.
  • Self-adjusting controls provide a low and constant dew point while preventing icing.
  • Thermally protected cooling fans & safety system
  • The ASD Series also features an on / off switch for models ASD60 to ASD500.
  • An automatic electronic drain is standard on all ProDry® ASD air dryers
  • And models ASD10 to ASD200 are UL approved.

High Temperature Dryers

Let's discuss the features and benefits of the ProDry® HTD refrigerated air dryer. It's a high temperature air dryer with a maximum air inlet temperature of 180ºF or 82ºC (Used with DV Systems' reciprocating air compressors). It is microprocessor controlled and maintains a stable dew point.

Features & Benefits:

  • An energy-efficient variable speed fan, aligning energy use with air demand.
  • A two-way heat exchanger, which improves efficiency and energy savings.
  • A high-efficiency, stainless steel moisture separator, promoting a low pressure drop and smooth operation.
  • A patented refrigerant circuit design, which adjusts cooling capacity to air volume and temperature.
  • Self-adjusting controls provide a low and constant dew point while preventing icing.
  • Thermally protected cooling fans & safety system
  • Models HTD26 to HTD52 come equipped with an internal 0.1 micron Air Filter
  • An automatic electronic drain is standard on all ProDry® HTD air dryers

 

The dairy industry uses dry, cool, clean compressed air to pneumatically operate state-of-the-art automation technology