Cycling Refrigerated Air Dryer

Van Air EMD Series Cycling Dryers

Van Air EMD Plus Series cycling refrigerated compressed air dryers provide a consistent dew point when running at less than the design capacity. Since the actual energy cost is directly related to the amount of air dried, energy savings is maximized. For example, in a pneumatic system designed to dry 1000 SCFM, a cycling refrigerated air dryer running at 75% of the design capacity would save approximately $1,000 per year in electrical energy costs versus a non-cycling dryer. At 50% of design capacity, the savings would increase to $2,000 per year.

EMD Plus Series cycling refrigerated compressed air dryers use direct expansion cooling to prevent dew point spikes, an inherent problem for competitive models using a thermal mass design. In thermal mass dryers, a refrigerant is used to cool a mass. This mass is then used to cool the compressed air. The time required to cool the mass delays cooling of the compressed air, resulting in dew point spikes up to 60°F that last 30 minutes or longer. These dew point spikes allow for extensive moisture carryover throughout the system.

In contrast, the Van Air cycling refrigerated dryer maintains a constant dew point temperature which helps eliminate moisture carryover. The constant dew point temperature provided by our EMD Plus Series cycling refrigerated air dryers can be achieved because of its unique flooded evaporator design. Unlike competitive thermal mass dryers, we display a digital readout of the air dew point temperature on the cycling refrigerated dryer and issue a written guarantee of dew point performance.

Features and Benefits

• Standard units up to 8,000 scfm
• Custom units up to 25,000 scfm
• Continuous dew point readout
• Five year warranty
• CFC-free refrigerant
• Adjustable dew point control 34°F - 50°F
• Performance guarantee
  

Applications

• Plant air system protection
• Auto body and paint shops
• Stationary abrasive blasting