Are there air filter cartridges that need to be cleaned before being used again after replacement?
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After replacing the filter cartridges of our self-cleaning air filters, a reverse blowing device was installed to enable their recycling. However, from the perspective of the backflow suppression effect, I personally think it’s not very effective. Has anyone tried this approach? Could you explain how it’s done, and what the results are after recycling?
The original poster can give it a try themselves and share their experience with everyone~~ After all, working on the air filter is also relatively easy~~
How to operate reverse blowing? We tried it once by using instrument air to purge from the outside of the filter cartridge; the results were average. We usually replace it once a year.
The filter layer is located outside the filter cartridge; it is more appropriate to blow from the inside out~~
Work on this has already begun, but the results are not significant.
Blowing the required amount of instrument air from the outside, continuously at it, is also a good approach; we, on the other hand, blow from the inside out, using the pulse principle.
I guess manual backwashing is the preferred option. Replacing it once a year seems a bit extravagant. But I have a question: what are the criteria for replacing the filter cartridge? At what point does it become necessary to replace it?
It’s better not to try this; it’s almost impossible to clean the filter paper properly. It might work for short-term use in emergency situations, but it’s not advisable for long-term use. The logic is simple: if it were possible to reverse the airflow, filter cartridge manufacturers would go out of business :P
After all, they are exposed to wind and rain, so the filter cartridge material may age or the filter elements may get clogged; as a result, their performance when reused is likely to be poor. For our equipment, we cover the outside of the filter cartridge with a layer of filter paper, and when the resistance increases we simply replace the filter paper, which effectively extends the lifespan of the filter cartridge~~
We tried it before: manually removing them and using instrument air to blow through the inside of the filter cartridges. There was a lot of dust, and after reinstalling them, the performance was average; the resistance of the filter cartridges was more or less the same as before removal； Later, they simply replaced everything with new ones. It needs to be replaced once a year, and a model priced at over 200 is indeed quite expensive. The manufacturer probably has a unique method for handling it; otherwise, they wouldn’t recycle it
We blew it manually using pressure gauges; it was dirty and tiring, but the result was still good