Introduction：

AFN nitrogen gas generators are the ideal source of nitrogen gas for instrument purge, nebulising gas, chemical and solvent blanketing. Nitrogen gas generators eliminate the need for costly, inconvenient high-pressure cylinders. They include an integral oil-free compressor as standard; the generator delivers a continuous stream of 99.999% pure nitrogen gas with residual oxygen content of less than 10 ppm without the need for secondary rification. The technology involved in providing a continual stream of high purity nitrogen is pressure swing adsorption (PSA). This technique uses a bed of carbon molecular sieve (CMS) to selectively remove oxygen and other contaminants from atmospheric air. The bed alternates between purification and regeneration modes to ensure continuous nitrogen production.This filtered compressed air stream is then passed to the CMS bed currently in purification mode. Whilst passing through the bed, the oxygen, carbon dioxide, moisture and some hydrocarbons are removed from the compressed air, resulting in a product stream of clean, dry, high purity nitrogen gas. Generators producing high purity nitrogen and air use the same PSA principle, using an additional bed of activated alumina for air purification.

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AFN nitrogen generator