Medical gases
Our specialty since 1977

The PSA process : a high technology perfectly known by Novair Medical

The oxygen generator is based on a patented implementation of the Pressure Swing Adsorption (PSA) which uses ambient air as raw material. 

Ambient air contains 21% oxygen, 78% nitrogen, 0.9% argon and 0.1% rare gases. The PSA process is a static separation of air gases via a specific molecular sieve designed to adsorb nitrogen under pressure, to produce oxygen-enriched air composed of 93% oxygen and above.

The oxygen generator is mainly composed of 2 separation vessels filled with molecular sieve adsorbers (zeolites), one complete pneumatic system (valves, filters, pressure regulator...) monitored by an automatic device, and an oxygen tank. 

Novair PSA TechnologyNovair PSA process layout

PSA process 5 main stages  

  • 1. Compressed air (78% nitrogen, 21% oxygen, < 1% argon) is filtered, degreased and dried and the production pressure is automatically regulated.
  • 2. Air passes through the molecular sieves where nitrogen is adsorbed by the zeolite, increasing oxygen concentration up to 95%.
  • 3. Out of the molecular sieve, the oxygen produced is sent through the buffer tank via a mutifunction block. Nitrogen is released via a silent escape and forced back outside. 
  • 4.Part of the oxygen produced is used to help the nitrogen desorption of one vessel while the other ensures oxygen production (and vice versa). 
  • 5. An automatic and pneumatic vessels balance system ensure a continuous oxygen flow. 
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