
HR Series Desiccant
Air Dryers
3.0 to 50 SCFM
HR Series Heatless Desiccant Air Dryers are the perfect companion to smaller horsepower compressed air systems for providing ultra-dry clean air.
- 8 Models Available to Match Your Application Requirements and Minimize Energy Loss
- Spring Loaded Desiccant Beds Help to Extend the Life of the Desiccant Packed in Each Tower
- Compact Design with Simple, Versatile Mounting and Installation Options
- Fully Re-Pressurizing Design for Steady Outlet Pressure and Flow
- Standard NEMA 4X Electrical Rating
- ISO 8573.1 Class 2 -40°F/C Standard Outlet Dew Point
Standard Features: |
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Optional Features: | |
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General Specifications: | ||||||||
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HR1 | HR2 | HR3 | HR4 | HR5 | HR6 | HR6.5 | HR7 | |
INLET Flow: (SCFM @ 100 PSIG) |
3.0 | 6.0 | 9.0 | 12.0 | 16.0 | 25.0 | 35.0 | 50.0 |
PURGE Flow (SCFM @ 100 PSIG) |
0.8 | 1.6 | 2.4 | 3.2 | 3.4 | 5.4 | 7.8 | 10.8 |
OUTLET Flow (SCFM @ 100 PSIG) |
2.2 | 4.4 | 6.6 | 8.8 | 12.6 | 19.6 | 27.2 | 39.2 |
Inlet / Outlet Ports (NPT) |
3/8" | 1/2" |
Dimensions: | ||||
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Weight (lbs) |
Height (in) |
Width (in) |
Depth (in) |
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HR1 | 8.0 | 13.6 | 7.4 | 5.2 |
HR2 | 9.0 | 18.2 | ||
HR3 | 10.0 | 17.3 | ||
HR4 | 11.0 | 21.1 | ||
HR5 | 29.0 | 33.0 | 9.5 | 6.5 |
HR6 | 34.0 | 41.9 | ||
HR6.5 | 59.0 | 39.3 | 10.0 | 7.0 |
HR7 | 65.0 | 46.3 |

HR1 - HR4 HR5 - HR8
Multiplier Table (For INLET Pressures other than 100 PSIG): | |||||||||||
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Maximum Inlet Flow (-40° F/C PDP) = INLET Flow (above) x INLET Flow Factor (A) @ Actual Pressure (below) Maximum Inlet Flow (-100°F/-73°C PDP) = INLET Flow (above) x INLET Flow Factor (B) @ Actual Pressure (below) Purge Flow = PURGE Flow (above) x PURGE Flow Factor (C) @ Actual Pressure (below) Rated OUTLET Flow = Calculated Maximum Inlet Flow - Calculated Purge Flow |
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Actual Pressure (PSIG) | 50 | 60 | 70 | 80 | 90 | 100 | 110 | 120 | 130* | 140* | 150* |
INLET Flow Factor (A) | 0.32 | 0.43 | 0.55 | 0.69 | 0.84 | 1.00 | 1.09 | 1.18 | 1.26 | 1.35 | 1.44 |
INLET Flow Factor (B) | 0.25 | 0.33 | 0.43 | 0.53 | 0.65 | 0.75 | 0.85 | 0.88 | 0.95 | 1.01 | 1.08 |
PURGE Flow Factor (C) | 0.56 | 0.65 | 0.74 | 0.83 | 0.91 | 1.00 | 1.11 | 1.18 | 1.26 | 1.35 | 1.43 |
*These pressures exceed the Standard input for HR5, HR6, HR6.5, & HR7.
Please Contact Altec AIR for assistance.
This tool will help you size the perfect HR Series Desiccant Air Dryer for your Compressor Output and Environmental Conditions. Simply enter the data & conditions and you'll be presented with the Part Number for the HR Series Air Dryer that will work optimally for those conditions. We will also provide Part Numbers for the Filter Kits that were created to match that HR Series Air Dryer perfectly.
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Need A Custom Sized Air Dryer?
Contact Altec AIR for assistance selecting the right dryer for your application.
All you need is the required Inlet or Outlet Flow Rate, Operating Pressure, and the required Dew Point.
Literature: |
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Industrial Products Brochure HR Series Specification Sheet |
Guides: |
HR Series User's Guide |
Sales Drawings: |
HR1 Sales Drawing HR2 Sales Drawing HR3 Sales Drawing HR4 Sales Drawing HR5 Sales Drawing HR6 Sales Drawing HR6.5 Sales Drawing HR7 Sales Drawing |
3-D CAD Models: (right-click on File and select "Save File As" or "Save Link As") |
HR1 3-D CAD Model HR2 3-D CAD Model HR3 3-D CAD Model HR4 3-D CAD Model HR5 3-D CAD Model HR6 3-D CAD Model HR6.5 3-D CAD Model HR7 3-D CAD Model |