29/06/2026
🔴 How often should molecular sieves be replaced? Don't get misled!
Many customers ask us: "How many years does a molecular sieve last?"
The answer is—there is no fixed lifespan; it all depends on these 4 factors:
💧 1. Is the inlet air clean?
Water, oil, and dust are the "three major killers" of molecular sieves. If pre-treatment is poor, the service life is cut in half.
⚙️ 2. Are operating conditions stable?
High temperatures, significant pressure fluctuations, and frequent start-stop cycles all accelerate aging.
🧪 3. The quality of the molecular sieve itself
High-quality 13X or lithium sieves offer superior mechanical strength and moisture resistance, naturally lasting 2–3 years longer.
🔧 4. Proper maintenance
Regularly replacing filter elements and performing timely regeneration is more effective than anything else.
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⚠️ When should you replace it?
If oxygen purity drops below 88%, output flow decreases significantly, or the sieve turns black or turns to powder—don't hesitate; it's time for a replacement.
🎯 The most scientific approach:
Record the "purity vs. flow" data when the sieve is new and test it monthly. Replace it as soon as you observe an irreversible decline.
👉 How long have you been using your oxygen-generating molecular sieve? Is the purity still stable? Let's chat in the comments—I can help you analyze the situation!
