... is mainly composed of blower,vacuum pumps, switch over valves, adsorption columns, and oxygen surge tank, etc. After being removed of ... ~50Kpa through the Roots blower and then enters into the adsorption column, in which the moisture,CO2 and other gas are ... . Clean feed air ensures the life of use and the adsorption efficiency.4) With modularized desig nand PLC control, the plant ...