AEHD Series 2017-11-01T16:35:15+00:00

AEHD Series

Externally Heated Desiccant Air Dryer

150 – 3,000 scfm

With its energy saving capabilities, the Aircel AEHD Series externally heated desiccant dryers combine e ciency with technology to meet the needs of your application. Heated process air regenerates the towers, requiring less purge air overall (about 7% the total rated capacity of the dryer).

  • -40°F dew point performance
  • Ambient Air Temperature: 38°F – 125°F
  • Inlet Air Temperature: 40°F – 110°F
  • Operating Pressure: 60 to 150 psig

For larger capacities and custom dryer options, please contact an Aircel factory representative.

Model NumberCapacityVoltageConnection SizeHeater kW (full load)FLAWeight (lbs.)HeightWidthDepth
AEHD‑150150460‑3‑601″ NPT2.53.71,000775836
AEHD‑250250460‑3‑601.5″ NPT3.755.21,500875844
AEHD‑350350460‑3‑602″ NPT68.12,000876253
AEHD‑500500460‑3‑602″ NPT79.32,300876653
AEHD‑750750460‑3‑602″ NPT1114.32,700898068
AEHD‑1,0001,000460‑3‑603″ FLG1519.44,100928068
AEHD‑1,2501,250460‑3‑603″ FLG1823.14,900978568
AEHD‑1,4001,400460‑3‑603″ FLG2228.25,200978568
AEHD‑1,6001,600460‑3‑604″ FLG2734.47,200998573
AEHD‑2,0002,000460‑3‑604″ FLG32.541.37,8001099491
AEHD‑2,5002,500460‑3‑604″ FLG37479,5001099494
AEHD‑3,0003,000460‑3‑606″ FLG455711,500119113102
  1. Compressed air flows through the pre-filter to remove oil and then enters the on-line Tower 1 through valve (A).

  2. Air moves upward, where the desiccant removes moisture from the air stream. The majority of clean, dry compressed air exits valve (B) and cycles through the after filter to then flow downstream.

  3. During the drying process, a small amount of the clean air exiting valve (B) travels to Tower 2 (shown in regeneration mode) to assist in the regeneration process.

  4. To regenerate Tower 2, valve (C) opens and the tower is depressurized to near atmospheric pressure. The air flowing from valve (B) moves down the tower, removing moisture from the desiccant bed. Once it travels to the bottom of Tower 2, it exits the tower through valve (C) and the exhaust muffler to ambient.

  5. Once Tower 2 is fully regenerated, valve (C) will close, repressurizing Tower 2 to line pressure with the slight airflow coming through valve (B).

  6. Next, valve (D) will open to depressurize Tower 1 and valve (A) will switch (not pictured), directing wet incoming air to Tower 2 for drying while Tower 1 is regenerating the desiccant bed.

  7. This process will repeats continuously every 4 hours unless the Energy Management System is extending drying time period during low load conditions to a maximum of 12 hours each cycle. The Energy Management System continually monitors the mid-bed humidity level in the drying tower to save energy by extending the drying cycle (up to 12 hours).