Membrane Air Dryers

Outlet Flows from 0.06 to 25 SCFM


Membrane Air Dryer

At the heart of the SUNSEP-W ™ brand membrane air dryer technology is the patented membrane fibers developed by Asahi Glass Company (AGC) which has nearly 50 years of experience in the separation of gases with membranes. 

The Sunsep drying process works by passing compressed air inside the hollow fiber membranes where the water vapor molecules permeate through the wall of the membrane leaving the oxygen and nitrogen molecules to exit the outlet as dry air. The permeated water vapor is then swept away by a small amount of dry air fed back over the outside of the membrane fibers through a purging valve or orifice.

Barrel Type

There are five models in the long vertical type membrane air dryers.  These dryers are used in applications with higher flow requirements.  No heat is created in the drying process allowing a stable temperature environment for sensitive instruments. All models are standard with moisture indicators to give a visual indication of dryer performance.

Cassette Type

Our cassette and flexible type dryers are especially well suited for installation in the tight spaces inside OEM machines.  The dryers require no electrical hook up and are very lightweight and compact in design. Uniquely shaped and available in six models our cassette type membrane dryers can fit in most tight spaces. .

Flexible Type

This one-of-a-kind membrane dryer is used in low air flow applications where space is at a premium. The dryer is flexible and can be bent to go through tight spaces between other components.

Product Features

  • Easy Installation
  • Compact and Lightweight
  • No Power Supply Required
  • Quiet Continuous Operation
  • No Moving Parts
  • Maintenance Free
  • Environmentally Friendly
  • No Refrigerants Used
  • No Desiccants Used

Typical Applications

  • Environmental Chambers
  • Pneumatic Automation Systems
  • Pollution Instrumentation
  • Laboratory Analyzers
  • Robotic Machinery
  • Air Bearings
  • Antenna Pressurization
  • Waveguide Drying
  • Air Operated Pumps
  • Spectrometers
  • Air Logic Circuits
  • Oil Well Logging Instruments
  • Analytical Instrumentation
  • Hazardous Atmosphere Locations

All Models
Maximum Operating Pressure 120 PSIG
Operating Temperature Range +32°F to 130°F

Port Size
(NPT or Metric)
*SCFM In *SCFM Out Weight
Purge Control
Barrel Type
SWB-01-100 1/4" 3.8 3 0.49 External Valve or Orifice
SWB-01-100-SSN 1/4" 3.8 3 0.95 External Valve or Orifice
SWB-01-200 1/4" 6.3 5 0.51 External Valve or Orifice
SWB-01-200-SSN 1/4" 6.3 5 1.4 External Valve or Orifice
SWB-02-100 3/8" 8.0 6.4 1.39 External Valve or Orifice
SWB-02-100-SSN 3/8" 8.0 6.4 1.95 External Valve or Orifice
SWB-05-100 3/8" 13.2 10.6 1.48 External Valve or Orifice
SWB-05-100-SSN 3/8" 13.2 10.6 2.1 External Valve or Orifice
SWB-10-150 1/2" 20 16 2.9 Internal Fixed
SWB-17-200 1" 25 20 10.6 Internal Fixed
Cassette Type
SWC-M04-70 M5 0.6 0.5 0.11 External Valve or Orifice
SWC-M08-100 / TMC-25-2 1/8" 0.9 0.7 0.57 Internal Fixed
SWC-M15-100 / TMC-50-2 1/8" 1.5 1.1 0.6 Internal Fixed
SWC-01-150 1/4" 4.7 3 0.93 Variable Three Position
SWC-02-250 3/8" 6.8 5 1.52 Variable Three Position
SWC-03-250 3/8" 9.6 7 1.56 Variable Three Position
Flexible Type
SWF-M06-400 1/4" 1.25 1.0 0.22 External Valve or Orifice
* Flows at 100 PSIG, 70°F inlet
Output at +35°F to 40°F pressure dew point

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Membrane Air Dryers Specification Sheet

Membrane Air Dryers Manual

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