These plants are designed for production of gaseous oxygen or nitrogen from atmospheric air by pressure swing adsorption (PSA) process. The PSA-process is based on the characteristic property of porous adsorbent material (molecular sieve) to adsorb selectively oxygen or nitrogen.

Zeolitic molecular sieve adsorbs preferably nitrogen to enable a pure oxygen production. Carbon molecular sieve absorbs preferably oxygen and therefore it is used to generate pure nitrogen.

The plants are designed for fully automatic operation, the products are available within a few minutes after start-up of the plant. Oxygen and Nitrogen PSA-plants feature low investment costs and low labour costs due to simple operation and maintenance.