What is the principle of action of the DEAR Liquid air separation unit (section-2 or section-3 valve) and how does it work?

In case of sudden power failure during the operation of small air separation unit, the following steps should be followed:   First, open the vent valve (anti surge valve) of air compressor to prevent the air compressor from surging and causing the air compressor to reverse due to air backflow;   Then check whether the molecular sieve adsorber switch should be interlocked to close, if not, it should be man...

How is the ratio of individual gases adjusted in an air separation plant?