VPSA (Vacuum pressure Swing Adsorption ) Oxygen gas Generators are based on well-proven technology using Zeolite Molecular Sieves (ZMS) & Vacuum system for regeneration.
When ZMS is used in the VPSA process, nitrogen Molecules, having a higher diameter than oxygen Molecule, passes through the pores and are adsorbed. Therefore, the Oxygen is recovered, while Nitrogen is adsorbed. Nitrogen molecules are readily absorbed at low pressures. VPSA-based oxygen gas plants are equipped with adiabatic regenerative vacuum pumps to make sure effective regeneration of ZMS.