MDH Series

MDH Series Desiccant
Air Dryers

0.4 to 3.2 SCFM

The MDH Series Heatless Desiccant Air Dryers are one of our smallest desiccant air dryers. It’s miniature, compact design is perfect for OEM applications and can be paired with small fractional horsepower air compressors.

  • 6 Models Available to Match Your Application Requirements and Minimize Energy Loss
  • Solid-State Timer with Built-In Memory Ensures Reliable Drying Cycles
  • Efficient Air Drying Performance from 50 PSIG to 120 PSIG Standard
    (Custom options down to 30 PSIG)
  • -40°F/C Standard Outlet Dew Point
    (ISO 8573.1 Class 2)
Standard Features:
  • Standard Outlet Dew Point
    • -40° F/C Pressure Dew Point (PDP)
  • Available Input Voltages
    • 120 VAC
    • 240 VAC
    • 12 VDC
    • 24 VDC
  • Maximum Pressure - 120 PSIG
  • Maximum Inlet Temperature - 120°F / 49°C
Optional Features:
  • Filtration Kit -
    • 5 Micron and 0.01 Micron Prefilters
    • 0.5 Micron Afterfilter
  • Filter / Regulator Kit
    • Filtration Kit (above)
    • Outlet Regulator & Gauge
General Specifications:
MDH1 MDH2 MDH3 MDH4 MDH5 MDH6
INLET Flow:
(SCFM @ 100 PSIG)
0.40 0.80 1.10 1.60 2.40 3.20
PURGE Flow
(SCFM @ 100 PSIG)
0.10 0.20 0.27 0.40 0.60 0.80
OUTLET Flow
(SCFM @ 100 PSIG)
0.30 0.60 0.83 1.20 1.80 2.40
Inlet / Outlet Ports
(NPT)
1/8" 1/4"
Dimensions:
Weight
(lbs)
Height
(in)
Width
(in)
Depth
(in)
MDH1 1.4 7.0 3.5 3.3
MDH2 1.5 10.3
MDH3 1.6 8.8 4.0 3.5
MDH4 1.9 10.1
MDH5 2.2 9.5 5.0 3.8
MDH6 3.1 11.5
MDH Series Dimensions
Multiplier Table (For INLET Pressures other than 100 PSIG):

Maximum Inlet Flow (-40° F/C PDP) = INLET Flow (above) x INLET Flow Factor (A) @ Actual Pressure (below)

Purge Flow = PURGE Flow (above) x PURGE Flow Factor (B) @ Actual Pressure (below)

Rated OUTLET Flow = Calculated Maximum Inlet Flow - Calculated Purge Flow

Actual Pressure (PSIG) 50 60 70 80 90 100 110 120
INLET Flow Factor (A) 0.32 0.43 0.56 0.70 0.85 1.00 1.09 1.17
PURGE Flow Factor (B) 0.57 0.65 0.74 0.83 0.91 1.00 1.09 1.18

This tool will help you size the perfect MDH 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 MDH 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 MDH Series Air Dryer perfectly.

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Filter Kit

Filter Kit

Filter Kit

Filter Kit

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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.