VSA Series

VSA Series Desiccant
Air Dryers

2.8 to 12.0 SCFM

The VSA Series Heatless Desiccant Air Dryers are one of our longest running, mature product lines. Its proven design continues to provide solid performance and reliability at point-of-use applications.

  • 4 Models Available to Match Your Application Requirements and Minimize Energy Loss
  • Solid-State Timer with Built-In Memory Ensures Reliable Drying Cycles
  • Fixed Orifice Purge Control for Consistent Ultra-Dry Outlet Conditions
  • Dual Inlet & Outlet Port Configurations Allows for Custom, Easy Installation
  • -40°F/C Standard Outlet Dew Point
    (ISO 8573.1 Class 2)
  • Available with ETL Listing
Standard Features:
  • Standard Outlet Dew Point
    • -40° F/C Pressure Dew Point (PDP)
  • Available Input Voltages
    • 120 VAC
    • 240 VAC
  • Maximum Pressure - 150 PSIG
  • Maximum Inlet Temperature - 120°F / 49°C
Optional Features:
  • Moisture Indicator
  • Filtration Kit -
    • 5 Micron and 0.01 Micron Prefilters
    • 0.5 Micron Afterfilter
  • Filter / Regulator Kit
    • Filtration Kit (above)
    • Outlet Regulator & Gauge
General Specifications:
(SCFM @ 100 PSIG)
2.8 5.8 8.0 12.0
(SCFM @ 100 PSIG)
0.8 1.7 2.5 3.2
(SCFM @ 100 PSIG)
2.0 4.1 5.5 8.8
Inlet / Outlet Ports
VSA1 7.0 10.1 8.0 4.8
VSA2 8.0 13.1
VSA3 9.0 16.1
VSA4 14.0 24.1
VSA 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 90 100 110 120 130 140 150
INLET Flow Factor (A) 0.32 0.43 0.56 0.70 0.85 1.00 1.09 1.17 1.26 1.35 1.44
PURGE Flow Factor (B) 0.57 0.65 0.74 0.83 0.91 1.00 1.09 1.18 1.26 1.35 1.44

VSA Series Drying Process

The VSA Series Heatless Regenerative Desiccant Air Dryers employ Pressure Swing Adsorption (PSA) technology. Ordinary compressed inlet air is passed through one Desiccant Tower where the water vapor is removed. The dry air then continues to the Outlet side of the Manifold and on to the application. A portion of the dried air is expanded through an Orifice and directed back through the offline Desiccant tower, purging the accumulated moisture. Every 30 seconds, a Solid-State Timer and two Solenoid Valves reverse the process. The result is a continuous supply of ultra-dry air.

This tool will help you size the perfect VSA 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 VSA 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 VSA 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.