A nitrogen generator works by separating nitrogen molecules from the oxygen molecules within compressed air. This can be done with a membrane nitrogen generator or a PSA (pressure swing adsorption) nitrogen generator connected to a compressor. But which technology to use? Well, it depends on the nitrogen quality you require. If, for example, you just need to inflate tires or use nitrogen to prevent/suppress fires, then a low nitrogen purity level of 90-99% and a membrane nitrogen generator will suffice. However, a PSA nitrogen generator is required when you have to achieve very high purities of 99.999% or 10 PPM (parts per million) and even higher – for example in the food industry or for plastic molding. In addition to allowing companies to control how much nitrogen they want to produce with how much pressure and which degree of purity, generating the gas themselves has other benefits. Nitrogen generators are used in hypoxic air fire prevention systems to produce air with a low oxygen content which will suppress a fire. On-site nitrogen generators allow you to produce your own nitrogen, requiring only a supply of compressed air. Compared to the on-demand delivery of gas bottles or tanks, on-site production of nitrogen gas helps companies meet application needs while achieving significant cost savings — reducing nitrogen costs by an average of 80%. PSA stands for pressure swing adsorption. This process is also referred to as 'swing of pressure' , which means that it allows for certain gases to be captured at higher pressure and released at lower pressure. The two tower PSA system allows for continuous nitrogen production at a desired purity level.
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