Modern can factories install two pressure lines, one for low- and one for high-pressure. Compressors run at 3,5 bar(g) or 50 PSI for most manufacturing steps. Also, pressure of 7 bar(g) or 100 PSI is required, in minor quantity. Target is the continuous availability of pneumatic energy to keep the production up and running, to avoid any downtime, with the lowest possible electric power consumption.