Onyx Ultra

21 SCFH oxygen production at 20 PSI is produced by the Onyx Ultra oxygen concentrator module.


Specifically designed for reliability, energy efficiency, and ease-of-use, there are thousands of Onyx PSA Oxygen Generators currently in use throughout the world. The Onyx’s reliability, low noise level, and ability to deliver up to 95% oxygen concentration make it a perfect fit for many applications.





     -Advanced Engineering

     -Easy to Install and Maintain

     -Low Operating Cost


Oxygen Pressure Boost Option:

Do you want to use an oxygen concentrator to supply your new hard shell hyperbaric chamber, but can't seem to keep the flow up when the pressure increases?  The standard 10 LPM oxygen concentrator may be rated to produce up to 20 psi, but when used to supply oxygen to hard shell hyperbaric chambers, the flow dwindles and will stop before getting there.  On top of the pressure within the chamber, the concentrator needs to overcome check valves as well, and there just is not enough pressure available.  A properly sized boost compressor can solve this problem and allow any oxygen concentrators you have available to provide the pressure you need. This boost compressor is a good option if you have a number of concentrators that are not doing the job of getting oxygen into your chamber.  The O2 Boost comes with DISS fittings that are used with supplying hyperbaric chambers.  



Product Characteristics:

Performance Data:

Product Flow

Oxygen Delivery Pressure



20 PSI (138 kPa)

Product Concentration Up to 95%
Product Dew Point -100°F (-73°C)

Dimensions (WxDxH)

16 x 15 x 29 inches (40 x 37 x 72 cm)


56 lbs (25 kg) 

(Add 1 lb for 220 V Unit)

Physical Connections

Product Gas Outlet


1/4" FNPT JIC-8

Ambient Operating Conditions 

Locate the oxygen concentrator system in a well-ventilated area that is protected from weather elements.

Temps should remain between 40°F (4°C) and 112°F (44°C) 

Control Power Requirements (Single Phase)

120 V ~ ± 10%, 60 Hz, 6.0 A

220 V ~ ± 10%, 50 Hz, 3.0 A


Typical Applications:


     -Glass Work/Blowing



     -Ozone (Generator) Feed Gas

     -Environmental Remediation


     -Fish Farming

     -Laboratory Experiments





Onyx Specifications

Onyx Manual

More Information
Manufacturer Air Sep
Call For Price No
Listing Description 21 SCFH @ 20 PSI
Oxygen Production 21-24 SCFH
Internal Compressor Yes
O2 Delivery PSI 20 PSI
Nominal Gas Flow Rate 21 SCFH
Operating Pressure 20 PSI
Max Pressure 20 PSI
Gas Connections 1/4" FNPT JIC-8
Dimensions (LxWxH) 16 x 15 x 29 inches
Operational RH Range NA
Operational Temperature Range NA
Power Requirements 120V ~ ±10%, 60 Hz, 6.0 A or 220V ~ ±10%, 50 Hz, 3.0 A
Lead Time In Stock
Warranty 1 Year
Country of Origin USA
Description Turnkey unit with built-in compressor
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