PSA Oxygen/ Nitrogen Generators are provided with zeolite molecular sieve that has more nitrogen adsorption capacity than oxygen under certain pressure. These Generators use zeolite molecular sieve as sorbent, produces oxygen by making use of the PSA principle. PSA Oxygen/ Nitrogen Generators are designed to provide optimum performance for longer period of time. PSA Oxygen/ Nitrogen Generators are durable and suitable for varied range of industrial applications.