Discover the advantages of investing in a top-tier pressure swing absorption (PSA) oxygen generator. Learn about the PSA oxygen production method and the perks of having PSA oxygen generator from Sihon-Ozone installed on your premises for your continuous oxygen needs.

PSA Oxygen Generation: How Does It Work?

In our atmosphere, oxygen makes up 21% of the air, with nitrogen comprising 78%, and the remaining 1% consisting mainly of argon and other trace gases. PSA oxygen generation employs zeolite molecular sieves to extract oxygen from the air. As zeolite selectively adsorbs nitrogen, it leaves us with a notably pure oxygen gas stream as the final product, suitable for various industrial processes. This method can achieve oxygen purities of up to 95%.

Differentiating between PSA (Pressure Swing Absorption) oxygen generators and VPSA (Vacuum Pressure Swing Adsorption) generators is crucial. The PSA method functions at notably higher pressures, which eliminates the need for the vacuum step that is necessary in VSA/VPSA processes.

Advantages of Using PSA Oxygen Generators


Opting for an onsite oxygen generator can often prove more cost-effective compared to the recurrent expenses associated with ordering and delivering oxygen cylinders or bulk liquid oxygen from an external supplier. With an onsite generator, there are no delivery charges, and it boasts straightforward, budget-friendly maintenance requirements.


Relying on an onsite oxygen generator is a dependable solution, as it utilizes the ambient air from the atmosphere to produce the necessary oxygen for your project. With your own oxygen generator in place, concerns about oxygen shortages become a thing of the past.


Prioritizing the safety of your employees is paramount, and this is where onsite oxygen generators prove to be immensely advantageous. Once installed, there is no requirement to transport or handle gas supplier cylinders or tanks. Conversely, if oxygen tanks necessitate delivery and setup within your facility, it introduces the potential for significant hazards and the risk of injury.

In the following, you'll find a list of advantages and characteristics of PSA oxygen generators and how they can enhance efficiency across a range of applications:

  • An independent onsite supply of oxygen which means freedom from the industrial gas supplier and their long term contracts and ever escalating oxygen costs
  • Fully automatic for on demand operation
  • Highly reliable
  • Easy, low cost maintenance
  • Minimal space requirements
  • FAST Return on Investment : Typical ROI’s in 6 – 24 Months
  • Oxygen purities from 93% to 99%
  • Oxygen flow capacities from 40 SCFH (1 m3/hr) to 4,000 SCFH (105 m3/hr)
  • Oxygen discharge pressures to 75 psig (5.2 bar) without booster compressors
  • High pressure systems to 2,500 psig (170 bar) available
  • Turnkey systems engineered, assembled and installed to specification

Touchscreen controllers equipped with the subsequent capabilities:

  • oxygen analyzer
  • air in pressure
  • oxygen discharge pressure
  • low oxygen purity alarm
  • low oxygen pressure alarm
  • maintenance advisory
  • optional remote monitoring, controlling and communications capability
  • optional oxygen flow monitoring
  • optional off spec. gas vent

Applications of PSA Oxygen Generator

A variety of applications exist for PSA oxygen generators, including but not limited to:

  • biogas production
  • chemical operations
  • glass furnaces
  • aquaculture installations
  • ozone generation for wastewater treatment
  • mining and smelting facilities
  • centralized oxygen supply for hospitals or veterinary clinics
  • room oxygen enrichment

Why Choose PSA Oxygen Generators from Sihon-Ozone?

Since 2000, Sihon-Ozone has been supplying PSA Oxygen Generators for a wide range of applications to customers worldwide. We have more than 2 decades of experience using on-site oxygen generation to help our customers reduce the cost of acquiring oxygen.

Contact Us to learn more about our PSA oxygen generators and how we can help you deliver significant cost reductions for your oxygen use.