Valve schematic examples
Gas purification by the PSA (Pressure Swing Adsorption) process - Design and prospects

The following examples incorporate parametric numbering (table 7), enabling all the operating cases corresponding to the successive adsorption of the various adsorbers present to be represented with a single graph. Thus, for the PSA N₂, VSA O₂ and PSA H₂ cycles presented here, we use the following tables, whose dimension depends on the number of adsorbers considered:

Passing from line to line, the PLC can then assign to each parameter "a" to "j", the number corresponding to the current phase time.