How does Nitrogen Gas Generators Work? To produce the nitrogen gas from compressed air Nitrogen Generators are used to set off on Pressure Swing Absorption. Nitrogen is an essential element to maintain the atmosphere of the earth. We breathe around 78% on nitrogen than any other element on earth. Nitrogen gas generators are always full of gas and are used to supply high purity of the gas. In the laboratories, pure nitrogen is produced. Nitrogen generators produced by quadrexcorp are used in a variety of ways and are highly cost-effective, reliable, and secure.