In modern industrial production and scientific R&D, nitrogen is an essential protective and process gas, used increasingly across applications. From food packaging and electronics manufacturing to chemical production and metal treatment, nitrogen purity and supply stability directly affect product quality and process efficiency. Choosing a reliable nitrogen generator is only the first step. In addition to selecting the right carbon molecular sieve (CMS), you must control the quality of the inlet air.
The stable operation and long service life of a nitrogen generator depend heavily on inlet air quality. If compressed air is not properly treated, it will not only contaminate the nitrogen product, it will also severely damage core components.
Requirements for Compressed Air
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Clean and contaminant-free: If the inlet air comes from an oil-lubricated compressor, oil mist, oil vapor, and particulates must be efficiently removed. We strongly recommend installing a coalescing oil-mist filter and an activated-carbon filter upstream. This is the gold standard for protecting the molecular sieve.
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Deep drying: Moisture is the nemesis of CMS. The inlet air must be dried, with a pressure dew point stably below +3 °C, and an optimal target of −20 °C. This prevents condensation that can cause CMS pulverization.
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Stable pressure: Maintain inlet pressure between 4 and 13 bar, with 6 to 8 bar as the optimal operating range to ensure efficient, stable adsorption.
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Appropriate temperature: Keep inlet temperature between 10 °C and 25 °C. Excessive temperature reduces adsorption efficiency, while too low a temperature may cause condensation.
To maximize system safety, Shanghai Jiuzhou recommends integrating pressure, temperature, and pressure-dew-point sensors into the nitrogen generator to monitor inlet conditions in real time. If inlet air quality deviates from the set standards, the system can issue timely alarms, serving as a fail-safe to prevent contaminated air from damaging costly PSA system components and to keep nitrogen output consistently stable, pure, and reliable.
Post time: Sep-08-2025