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The Sullair desiccant regenerative dryer family is ideal for outdoor piping and operations that require an extremely low dew point to -40°F (-40°C) (-4°F [-20°C] or -100°F [-73°F] optional). By combining the proven benefits of desiccant drying with the most advanced designs, Sullair offers a reliable system to clean and compressed air for the most critical applications.

Desiccant dryers adsorb moisture from the compressed air as the air passes through the desiccant. DBP Series dryers regenerate the desiccant using a blower to pass ambient air through a low watt density heater (heated air can absorb more moisture). The dual tower design allows for continuous adsorption of moisture by alternating the adsorbing and regenerating towers.


500 – 10,000 cfm
14.16 – 283.17 m³/min
  • 500 to 10,000 acfm (14.16 to 283.17 m3/min)
  • Maximum inlet pressure: 230 psig (16.0 bar)
  • Maximum inlet temperature: 150°F (66°C)
  • Maximum ambient temperature: 122°F (50°C)
  • PLC control and display (Siemens)
  • Pre- and after-filter pre-piped and mounted
  • Field adjustable drying cycle time (10 –15 min.)
  • Pilot air filter
  • Easy front access control panel
  • -40°F (-40°C) pressure dew point
  • Fully automatic self-contained dryer
  • Adjustable purge valves
  • High quality valves
  • Purge flow indicator
  • ASME/CRN code welded pressure vessels
  • UL/CUL electrical certified
  • Separate drain and fill port
  • Robust steel frame with floor stand
  • Separate safety pressure relief valve for each tank
  • Stainless steel inlet/outlet diffusers
  • Insulated heater housing and piping
  • High outlet temperature shut off and alarm
  • User-friendly diagnostic control display
  • Safety back-up contactors
  • Thermostatically controlled heating
  • Safety heater thermostat
  • Low-watt density heater
  • Tower pressure gauges
  • Fail safe design in case of power failure
  • Color touch screen monitor
  • PLC Ethernet communication port
  • Demand Cycle Control
  • Pre-piped filter and bypass packages
  • Low bed temperature shut off with light and contact
  • High heater remote temperature alarm
  • NEMA 4, 4x enclosures
  • Visual moisture indicator
  • 3 valve and 9 valve bypass options
  • Optional voltage
  • Failure to shift alarm
  • -4°F (-20°C) pressure dew point
  • Purge flow meter
  • Dew point monitoring system
  • Low ambient package
  • Microprocessor based controls/Modbus
  • Sub-zero ambient package
  • Allen Bradley PLC with color touch screen monitor

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