What is PSA oxygen?

PSA is short for pressure swing adsorption.

Pressure
Elevated pressures are needed for the process, usually 4-8 bar(g). In case a higher pressure is required for your process, this can be applied, too.

Swing
While one vessel is being pressurized, the other vessel is being depressurized.

Adsorption
The separation of atmospheric air is done with the PSA principle; oxygen is separated from the air through the adsorption process.

How does it work?

 EWS on-site PSA oxygen plants are based on the well-known PSA technology (PSA means pressure swing adsorption). Two pressurized vessels with zeolite ensure continuous production for the separation of oxygen from other gases.

An EWS O2 generator consists of two pressure vessels storing zeolite.

Dry compressed air is blown through a valve to the first vessel where the pressure is built to reach 4 to 8 bar(g). The unwanted gas (N2) is adsorbed by the zeolite during the building of pressure, and the oxygen will pass through to the accumulation tank.

While pressure is building in one vessel, the other vessel is regenerating through a decrease in pressure. This process guarantees a continuous flow. Before the subsequent adsorption or desorption stage, the pressure between the adsorption vessels will be equalized. When pressure decreases in the first vessel and the zeolite becomes saturated, the waste product is exhausted through the exhaust system. Now the pressure in the second vessel will build up until the pressure between both vessels is once again equalized.

Advantages of PSA

• The process of the PSA technology (pressure swing adsorption) is an extremely clean operation. Air is the only ‘raw material’.
• With an EWS on-site PSA oxygen plant, you are guaranteed an uninterrupted supply of oxygen.
• This means you can produce oxygen at a place and time of your choice, and in the quantity and quality, you prefer. No more waiting for external suppliers or paying excess prices for your O2.
• PSA is a cost-efficient process for producing O2. It offers the best hospital and industrial oxygen price for your application.
• The PSA process is continuously repeated to provide you with an uninterrupted supply of oxygen.
• Our PSA oxygen generators can produce purities between 92% oxygen.

Applications overview

PSA technology is used in a great number of applications. Click to explore the advantages of a PSA oxygen plant from EWS Greentech for your specific application

• Hospitals
• Industry
• Medical Camp
• High Terrian Area
• Army
• Low Oxygen Area