Our E TECH – S Model Nitrogen Plant/Generator operating on PSA technology consists of twin tower system filled with special grade of imported carbon molecular sieves (C.M.S.) at a time, one tower keeps in production cycle and other in regeneration cycle. When compressed air passed through C.M.S. bed, the molecules of oxygen, moisture & other unwanted gases are adsorbed on surface of C.M.S. And the nitrogen which is not adsorbed by C.M.S comes out of adsorption tower and is collected in a surge vessel. Two adsorption towers are provided which are interconnected with auto change over valves controlled by a sequence programmer (PLC). When one tower saturates with oxygen the process automatically changes over to another tower. This ensures the continuous production of the Nitrogen gas.