AllerAir AirMedic Pro 6 Plus Air Purifier with UV Dental Source Capture
Allergy Purifiers LLC offers only the highest rated, most effective
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AirSep PSA/VPSA Tonnage Oxygen Systems


What is a tonnage system ?

PSA or VPSA Systems that generate more then 5 tonne/day of oxygen and can not be shipped fully assembled are classified as a tonnage system*

* 5 tonne/day or less capacity systems are shipped fully assembled and are part of AirSep’s standard product line.

Adsorption Air Separation Processes

Pressure Swing Adsorption (PSA) Selective adsorption at elevated pressure and ambient temperature – lowering pressure to atmospheric (pressure swing) for adsorbent regeneration

Vacuum Pressure Swing Adsorption (VPSA) It is similar to PSA except the regeneration pressure is lower then atmospheric. * PSA and VPSA both employ the same adsorption pressure to regeneration pressure ratio of three.


PSA and VPSA Comparison

Adsorption/Desorption Pressure Ratio
Adsorption Pressure
45 psia
21 psia
Desorption Pressure
14.7 psia
7 psia
Feed Air Supply
Feed Air Compressor
Roots Blower
Waste Discharge
Vacuum pump


*Able to deliver up to 3 bar g without an oxygen compressor
*Can supply its own instrument air
*Easy installation
*99% On stream efficiency
*High power consumption
*Able to deliver up to 1.5 bar g with out an oxygen compressor
*Can supply its own instrument air
*Easy installation
*99% On stream efficiency
*Needs an oxygen compressor for pressures above 1.5 bar g
*Very low power consumption
*99% On stream efficiency
*Requires an oxygen compressor in most cases
*Requires instrument air package
*Expensive installation


Typical VPSA Layout:

Click HERE for a photograph of an existing installation


AirSep vs. Competition

AirSep 2-bed VPSA
  • Cycle time - 50 sec

    Ambient temperature range:
  • 12 degrees- 120 degrees

  • .43 KWH/Nm3 Total Product
Single-bed VPSA
  • Cycle time - 20 sec

    Ambient temperature range
  • 32 degrees- 100 degrees

  • .43 KWH/Nm3 Total Product
  • More frequent valve maintenance
    and the risk of long term sieve damage


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Allergy Purifiers LLC, o3ozone 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020
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Carbon Filter, AllerAir AirMedic Dental Source Capture, HEPA gas, ODOR
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AllerAir HEPA Carbon Air Filter Allergy Purifies for Asthma MCS, VOC, Odors, Hospitals, clean rooms, dental offices, and anywhere the maximum degree of filtration is required. offers a large selection of purification products.

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