Oxygen generator

Oxygen generator

Oxygen generators produce gaseous oxygen from compressed air on site and offer a cost-effective, reliable and safe alternative to traditional oxygen gas supplies such as cylinders or cryogenic liquid. Oxywise Oxygen Generators are available in 20 standard models with capacity ranging from 0,4 to 150 Nm3/hour at 95% purity. The design is made for round the clock 24/7 operation. Each generator is equipped with automatic start&stop function, enabling the generator to start and stop automatically according to the consumption.


Pressure Swing Adsorbtion (PSA) is the most commonly used non-cryogenic oxygen production process; most effective for small and medium capacities. The process operates by using two columns filled with adsorbent, a molecular sieve called Zeolite. Pre-treated compressed air enters the first column and follows up through the Zeolite. Nitrogen and some other gases are being trapped while the oxygen is allowed to flow through. When the active column is saturated, the air flow is directed to second column. The first column depressurizes allowing nitrogen to be purged out to the atmosphere and completely regenerates. The process is repeated continuously, when one column is productive, the other regenerates and at the end of each cycle they switch roles. The generator produces constant flow of purified oxygen.

Technical Specification

Flow rate:0.4 Nm3/h to 150 Nm3/h
Purity:90% to 95% (based on customer's requirements)
Dew point:-50°C
Operating temperature:5°C – 45°C

Standard features: 

  • Control system with SIEMENS colour touch operated panel
  • Automatic start/stop
  • Built in purity analyser for continues monitoring
  • Reliable – built for uninterrupted operation
  • Designed for dynamic pressure loading
  • Robust design, piping from Stainless Steel (AISI316)
  • Data-logging (saved on memory card)


  • Molecular sieve moisture protection 
  • GSM modem  (remote start/stop, status SMS, alarm warning SMS)
  • Flow meter with totalizer
  • Oxygen dew point sensor
  • Temperature sensor
  • Purity and pressure control
  • Audio/visual alarm
  • Modbus TCP/IP connection
  • Remote control


Case stories

Oxywise News

An example of an indoor installation of oxygen filling station model O1FS

1. Air compressor with a build-in dryer and air tankHotter the air, the more capacity to hold water it has. Moisture deactivates the molecular sieve in the generator, therefore it has to be removed by refrigeration dryer and the drain system. The dryer is sized according to the maximum ambient temperature to make sure the pressure dew point is within the limit, +3°C or below.

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Oxywise News

What is the difference between Nm3 and Sm3?

Unfortunately neither Nm3 (normal cubic meter) or Sm3 (standard cubic meter) are complete definitions in themselves. It is essential to know the standard reference conditions of temperature and pressure to define the gas volume since there are various debates about what normal and standard should be.

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Oxywise News

What is PSA and how it works?

Generator columns are filled with molecular sieve. A product Gas is separated from clean&dry compressed air by PSA method (Pressure Swing Adsorbtion).

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