Airox Nigen Equipments Pvt. Ltd. Offers Pressure Swing Adsorption - PSA Oxygen Gas Generator. Airox Nigen Equipments Pvt. Ltd. Supplies adsorption based gas generators and air & gas drying equipments. Pressure Swing Adsorption - PSA Oxygen Gas Generator extensively uses zeolite molecular sieve as adsorbent which produces oxygen with the usage of PSA principle. Pressure Swing Adsorption - PSA Oxygen Gas Generator has the PLC controls pneumatic valve [Change over Valve] on/off to realize two towers alternate adsorption and description as per pressure change, carries out oxygen/ nitrogen separation and produces oxygen with desired purity. The PSA oxygen plants has the purity of 93- 95% with range up to 500m3/hr as per advanced technology and design.