Proper maintenance of your filtration system is essential to protect your PSA nitrogen generator and maintain consistent nitrogen purity. Here are recommended best practices:
🔹 1️⃣ Follow Recommended Filter Change Intervals
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Particulate Filters: Replace every 6-12 months (or more frequently in harsh environments).
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Coalescing Filters: Replace every 6–12 months, depending on oil content in compressed air.
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Adsorbing Filters: Replace every 6–12 months, or sooner if oil vapors are present in the supply.
Note: Always follow recommendations for your system.
🔹 2️⃣ Inspect Filter Housings Regularly
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Check for pressure differential across filters (many housings have a ΔP gauge — rising ΔP indicates clogging).
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Inspect drains on coalescing filters — verify that liquids are draining properly.
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Look for signs of oil, moisture, or particulates downstream (early warning of filter bypass or failure).
🔹 3️⃣ Always Replace Elements — Do Not “Clean” Them
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Filter elements are not designed to be cleaned or reused.
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Cleaning can damage the filter media and result in bypass of contaminants into the PSA beds.
🔹 4️⃣ Maintain Proper Filter Order
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Filters must always be installed in correct sequence:
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Particulate → Coalescing → Adsorbing → PSA unit
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Skipping or rearranging stages increases risk of contamination.
🔹 5️⃣ Use OEM-Approved Filter Elements
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Always use OEM-approved high-quality elements.
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Off-brand elements may not meet required efficiency ratings and can void system warranties.
🔹 6️⃣ Monitor System Purity
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Regularly verify nitrogen purity with calibrated analyzers.
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If unexpected purity drops occur, inspect filtration stages first — contaminated beds are often the result of upstream filter issues.
Bottom Line:
Consistent filter maintenance is one of the most cost-effective ways to protect your PSA nitrogen generator. Following these best practices will extend system life, ensure reliable purity, and reduce downtime.
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