Airox Nigen Equipments Pvt. Ltd. Manufactures Pressure Swing Adsorption - PSA Nitrogen Gas Generator. Airox Nigen Equipments Pvt. Ltd. Supplies adsorption based gas generators and air & gas drying equipments. Pressure Swing Adsorption - PSA Nitrogen Gas Generator can be adjusted to give the desired nitrogen quality for the process and application. Pressure Swing Adsorption - PSA Nitrogen Gas Generator is skid mounted and pre-commissioned at the works. P.S.A technology is based on the selective adsorption phenomena of gas molecules under pressure on the surface of highly porous and efficient adsorbent and in this case of nitrogen generation the adsorbent is carbon based molecular sieve [C.M.S.].