With the rapid development of industry, Nitrogen Gas Plants have been widely applied in chemical industry, electronics, metallurgy, food, machinery and other fields, among which PSA nitrogen making machine using pressure swing adsorption technology has become the mainstream nitrogen making method. Then air storage tank system is one of the main components of PSA nitrogen making machine. The function of the air storage tank system is mainly to ensure the stability of the oxygen and nitrogen separation system, prevent the instantaneous airflow velocity from being too fast when the oxygen and nitrogen separation system is switched, affect the air purification effect, improve the quality of compressed air entering the adsorbent, and help to extend the life of the molecular sieve. At the same time, when the adsorption tower is switched, it also provides a large amount of compressed air for PSA oxygen and nitrogen separation device to increase pressure quickly in a short time, so that the pressure in the adsorption tower quickly rises to the working pressure, ensuring the reliable and stable operation of the equipment. The air storage tank system consists of air storage tank, safety valve, globe valve, ball valve, pressure gauge and so on.