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Regenerative Desiccant Air Dryers – HR-SERIES
HR-Series Air Dryers

Using Pressure Swing Adsorption (PSA) technology, the Twin Tower Engineering regenerative air dryers are designed to maximize the efficiency of the drying process. Ultra-Dry compressed air dew points of -40°F to better than -100°F can be achieved.

HR-SERIES DRYER SPECIFICATIONS
Model No. HR1 HR2 HR3 HR4 HR5 HR6 HR6.5 HR7
Flow Capacities at 100 PSIG (SCFM)
Inlet Flow 3.0 6.0 9.0 12.0 16.0 25.0 35.0 50.0
Purge Flow 0.8 1.6 2.4 3.2 3.4 5.4 7.8 10.8
Outlet Flow 2.2 4.4 6.6 8.8 12.6 19.6 27.2 39.2
Flow Capacities at 150 PSIG (SCFM-with orifice change)
Inlet Flow 4.2 8.4 12.9 17.2 22.5 35.9 50.3 71.9
Purge Flow 0.8 1.5 2.4 3.3 3.4 5.5 8.0 11.1
Outlet Flow 3.4 6.9 10.5 13.9 19.1 30.4 42.3 60.8
Flow Capacities at 50 PSIG (SCFM-with orifice change)
Inlet Flow 1.7 3.4 5.1 6.8 9.0 14.1 19.6 28.2
Purge Flow 0.7 1.4 2.1 2.8 3.0 4.8 7.7 9.7
Outlet Flow 1.0 2.0 3.0 4.0 6.0 9.3 11.9 18.5
Connections (NPT)
Inlet/Outlet 3/8 3/8 3/8 3/8 1/2 1/2 1/2 1/2
Weight
Weight 8 9 10 11 29 34 59 65
ALL MODELS
Voltages available: 115/1/50/60, 230/1/50/60
Maximum temperature: 120°F ambient
Maximum pressure:150 PSIG
Outlet dew point: -40°F pressure dew point (PDP) with 100°F saturated inlet
RECOMMENDED FILTRATION ON INLET
5.0 micron particulate filter and 0.01 micron coalescing filter w/auto drains

HR SERIES DIMENSIONS
MODEL H W D P A B
HR1 13.6 7.4 5.2 9.3 5.8 2.8
HR2 18.2 7.4 5.2 13 5.8 2.8
HR3 17.3 7.4 5.2 12.1 5.8 2.8
HR4 21.1 7.4 5.2 14.9 5.8 2.8
HR5 33 9.5 6.5 20.7 7 23.6
HR6 41.9 9.5 6.5 29.7 7 31.3
HR6.5 39.3 10 7 29.5 7 31.3
HR7 46.3 10 7 33.4 9 37

Note all HR5-7 dryers are shown

with bracket top and bottom.

HR1-4 has single 4-hole bracket.

 Dimensions in inches.
Dimensions for HR-Series Dryers

FEATURES

  • Very dry outlet air to better than -100°F dew point
  • Flow capacities of 3 to 50 SCFM
  • 8 model sizes to match application requirements
  • Max pressure 150 PSIG
  • Compact and lightweight design requires less space
  • Solid State timer with memory for energy savings
  • Standard NEMA 4X Electrical Rating
  • Fully repressurizing design for steady outlet pressure
  • Fixed, self cleaning orifices for accurate purge control
  • Standard non-plugging, non-corroding purge mufflers

TYPICAL APPLICATIONS

  • Ozone Generators
  • Environmental Chambers
  • Dry Glove Boxes
  • Pneumatic Automation Systems
  • Dental Air Compressors
  • Medical Air Compressors
  • CEMS Systems
  • Laboratory Analyzers
  • Dry Sprinkler Systems
  • Outdoor HVAC Controls
  • Dry Nitrogen Replacement
  • Electronic Chip Testing
  • Air Bearings
  • Vortex Tubes
  • Gas Chromatographs
  • Robotic Machinery
  • Car Wash Controls
  • Air Turbines
  • Air Operated Pumps