
MHR Series Desiccant
Air Dryers
75 to 3000 SCFM
Altec AIR’s MHR Series Heatless Desiccant Air Dryers are our largest capacity regenerative air dryers to meet the needs of the industrial compressed air market.
- ASME Inspected, Stamped, & CRN Registered Pressure Vessels
- Fully Re-Pressurizing Design for Steady Outlet Pressure and Flow
- Solid State Control System for Reliable Operation
- Dryer Operation Sequence Lights with Fail-to-Shift Alarm Feature
- Standard NEMA 4X Electrical Rating
- Consistent ISO 8573.1 Class 2 -40°F/C Standard Outlet Dewpoint
Standard Features: |
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Optional Features: | |
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General Specifications: | |||||||
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MHR75 | MHR100 | MHR125 | MHR150 | MHR200 | MHR250 | MHR350 | |
INLET Flow: (SCFM @ 100 PSIG) |
75 | 100 | 125 | 150 | 200 | 250 | 350 |
PURGE Flow (SCFM @ 100 PSIG) |
10.9 | 14.6 | 18.2 | 21.9 | 29.2 | 36.5 | 51.1 |
OUTLET Flow (SCFM @ 100 PSIG) |
64.1 | 85.4 | 106.8 | 128.1 | 170.8 | 213.5 | 298.9 |
Inlet / Outlet Ports (NPT) |
1" | 1-1/2" |
MHR520 | MHR620 | MHR800 | MHR1000 | MHR1200 | MHR1600 | MHR2000 | MHR3000 | |
INLET Flow: (SCFM @ 100 PSIG) |
520 | 620 | 800 | 1000 | 1200 | 1600 | 2000 | 3000 |
PURGE Flow (SCFM @ 100 PSIG) |
75.9 | 90.5 | 116.8 | 146.0 | 175.2 | 233.6 | 292.0 | 438.0 |
OUTLET Flow (SCFM @ 100 PSIG) |
444.1 | 529.5 | 683.2 | 854.0 | 1024.8 | 1366.4 | 1708.0 | 2562.0 |
Inlet / Outlet Ports (NPT) |
2" | 3"(FLG) | 4"(FLG) |
Dimensions: | ||||
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Weight (lbs) |
Height (in) |
Width (in) |
Depth (in) |
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MHR75 | 475 | 70 | 31 | 20 |
MHR100 | 590 | 36 | ||
MHR125 | 560 | |||
MHR150 | 650 | 40 | ||
MHR200 | 780 | 90 | 52 | |
MHR250 | 950 | 54 | ||
MHR350 | 1150 | 96 | 56 | 22 |
MHR520 | 1500 | 30 | ||
MHR620 | 1900 | 65 | 38 | |
MHR800 | 2200 | 72 | ||
MHR1000 | 3700 | 76 | 42 | |
MHR1200 | 6000 | 92 | 88 | 48 |
MHR1600 | 6500 | 116 | 100 | 58 |
MHR2000 | 7600 | 118 | 134 | 52 |
MHR3000 | 9500 | 140 | 60 |

Multiplier Table (For INLET Pressures other than 100 PSIG): | |||||||||||||
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Maximum Inlet Flow = INLET Flow (above) x INLET Flow Factor (A) x INLET Temp Factor (C) Purge Flow = INLET Flow (above) x PURGE Flow Factor (B) x INLET Temp Factor (C) Rated OUTLET Flow = Calculated Maximum Inlet Flow - Calculated Purge Flow |
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Actual Pressure (PSIG) | 60 | 70 | 80 | 90 | 100 | 110 | 120 | 130 | 140 | 150 | 175* | 200* | 250* |
INLET Flow Factor (A) | 0.60 | 0.70 | 0.80 | 0.90 | 1.00 | 1.09 | 1.17 | 1.25 | 1.30 | 1.35 | 1.55 | 1.70 | 1.85 |
PURGE Flow Factor (B) | 0.225 | 0.197 | 0.175 | 0.159 | 0.146 | 0.135 | 0.127 | 0.120 | 0.116 | 0.112 | 0.099 | 0.091 | 0.085 |
Inlet Temp (°F) | 80 | 90 | 100 | 110 | 120 |
Inlet Temp Factor (C) | 1.14 | 1.13 | 1.00 | 0.76 | 0.67 |
*These pressures exceed the MHR Standard input.
Please Contact Altec AIR for assistance.
This tool will help you size the perfect MHR 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 MHR 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 MHR 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 Dewpoint.
Literature: |
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Industrial Products Brochure MHR Series Specification Sheet |
Guides: |
MHR Series Owner's Manual |