Patent ID: 7309376

Claim:
A process for production of respirable air comprising the following stages: treatment of compressed air comprising an operation for drying the air; rehumidification of the treated dry air, characterised in that the rehumidification stage of the treated dry air comprises an operation for controlled distribution of the treated dry air on the one hand in a rehumidification line ( 24 ), and on the other hand in a dry line ( 22 ), and characterised in that a difference in pressure is created between the rehumidification line ( 24 ) and the dry line ( 22 ), 50 as to favour the passing of treated dry air coming from the dry line ( 22 ), in an outlet pipe ( 26 ), wherein said difference in pressure is obtained through an anti-return valve ( 30 ) mounted on a dry air pipe ( 28 ) with known loss of load.