... 4) SIMENS PLC Controller 1, Product Name: Nitrogen Machine/ N2 Gas EquipmentA full installation requires air compressor, ... and purged in adsorption tower under depressurization. Moreover, adsorbent can be recycled. 3, Application:Food packing, Food storing, ... For anneal protection, agglomeration protection, nitrogenizing, furnace washing and blowing, etc. Used in fields such as metal heating treatment ...