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Sullair DHL Desiccant Dryer

Sullair DHL Series
Desiccant Heatless Dryer


The dual tower design of the DHL series dryers allows for continuous absorption of water from compressed air by using a desiccant bed. Drying is accomplished by passing wet compressed air through the desiccant bed of one tower where moisture is absorbed. Regeneration of the desiccant is accomplished without the use of heat. The wet bed is dried by diverting a small amount of dry air from the outlet at near atmospheric pressure. The purge flow rate is adjustable to suit the desired dew point. The dry air flows in a counter direction through the wet bed, sweeping all the water vapor previously absorbed by the desiccant.


  • 80 to 5000 scfm (2.26 to 141.58 m3/min)

  • Pre- and after-filter pre-piped and mounted  – As a Standard
  • Adjustable purge valves
  • ASME/CRN code welded pressure vessels
  • Easy front access control panel
  • Fail safe design in case of power failure
  • Field adjustable drying cycle time
  • Fully automatic self contained dryer
  • High quality valves
  • Pilot air filter
  • Purge flow indicator
  • Robust steel frame with floor stand
  • Separate drain and fill port
  • Separate safety pressure relief valve for each tank
  • Stainless steel inlet/outlet diffusers
  • Tower pressure gauges
  • UL/CUL electrical certified

  • 3 Valve and 9 valve bypass options
  • -4°F and -100°F pressure dew point
  • Demand Cycle Controller DDC with or without dew point monitior
  • Dew point monitoring
  • Failure to shift alarm
  • High dew point alarm
  • High pressure up to 500 psig
  • Low ambient package
  • NEMA 4, and SS NEMA 4x enclosure
  • Optional voltage 220-230 / 1/50-60
  • Pneumatic controls
  • Visual moisture indicator
  • Hour Meter
  • Mounted inlet and outlet Temperature and Presurre gauges
  • Stainless Steel control tubing

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