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Dessicant Air Dryers

DD Series

Heatless, Regenerative

Dessicant Air Dryers

Desiccant Heatless Regenerative Air Dryer


The DD Series Heatless, Regenerative Dessicant Air Dryers from 28 to 115 SCFM & Is Ideal for Flow Applications Requiring Extremely Dry Compressed Air.

Equipped with a Purge Adjusting Valve, Energy-Efficient Operation is Optimized by Allowing Purge Flow to be Adjusted and Aligned with System-Specific Air Demands. Energy costs are Reduced by Optimizing the Time the Air Dryer Spends Purging During the Regeneration Cycle.


  • Maximizes Energy Efficiency
    Adjustible Purge Flow Aligned with System Specific Air Demand
  • -40 Dew Point Performance
    Delivers Extremely Dry Compressed Air
  • PLC Controller
    Allows Customization of Settings
  • Lower Energy Costs
    Reduced Purge Time During Regeneration Cycle

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Heatless Regenerative Desiccant Air Dryer

Dry air is critical in many applications, as well as essential in ensuring an air system’s reliability & efficiency. Excessive water (in liquid or vapour state) present in a compressed air system potentially causes a variety of operational problems, such as: The freezing of outdoor air lines, corrosion in piping & equipment, malfunctioning pneumatic control instruments, failing processes & products, etc.

Heatless, Regenerative Desiccant Air Dryers are instrumental in ensuring an air system’s reliability & efficiency and are commonly used in a wide range of industrial & commercial facilities requiring extremely dry compressed air, or where ambient conditions are below freezing.

Valves & Filtration
  • Purge Adjusting Valve
  • Two normally-open inlet solenoid switching valves
  • Two pneumatically operated purge exhaust valves
  • One shuttle valve
  • Re-pressurization valve to prevent desiccant bumping
  • Stainless-steel retainers
  • 0.01 Micron coalescing filter on inlet and 1 micron particulate filter on the outlet with automatic drain valves
  • PLC Controller
  • Left & Right Tower Pressure Gauges
  • Purge Pressure Gauge
  • Moisture Indicator – Alerts operator of elevated dew-point
  • Throttling Valve – Allows accurate purge pressure adjustment
Safety & Code Compliance
  • Twin desiccant towers built to ASME codes and CRN registered
  • DD dryers are CSA approved
  • Two silencers (Purge mufflers)
  • Two safety relief valves
  • NEMA 4 electrical enclosure with PLC controller
  • Input = 120 V, 60 Hz, Single Phase
  • Purge Pressure Gauge
  • Moisture Indicator – Alerts operator of elevated dew-point
  • Power consumption = 40 Watts


  • Models DD28 – DD115
  • Type Heatless, Regenerative
  • Capacity 28 – 115 SCFM
  • Dew Point
    -40 F°
    -40 C°
  • Air Inlet Temperature
    80 to 200 F°
    26 – 93 C°
  • Pipe Size 1/2″ to 1″