The nitrogen generators we use works with carbon pellets and are made by Van Amerogen in Holland.
It works with a blower witch forces the air trough the carbon pellets under pressure, the air molecules can not go trough the carbon 's holes but the nitrogen can. After a predetermined time the carbon are saturated with oxygen molecules, the cycle then changes and the carbon are cleaned via a vacuum machine.
The system normally consist out of two cylinders wit the carbon inside them so that u never have a off production time.