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Spiral membrane elements, filter cartridges, bag filters, housings and the cleaning chemistry that determines element life.
Send the serial number of the unit, and a photograph of its nameplate with it. The serial number is what the part is ordered against; the nameplate settles which version of the machine it belongs to, because the same number can appear on more than one.
Part numbers are welcome where you have them. The quotation states the genuine part, its origin and its lead time.
A membrane does not wear mechanically. It fouls, is cleaned, and each cleaning cycle recovers slightly less flux than the last. The element is retired when flux recovery has fallen far enough that the line can no longer hold its rate.
| Item | Figure |
|---|---|
| Spiral polymeric UF / RO, dairy | 1–3 years typical; 4–5 with tight discipline |
| With an enzymatic and chelating regime | 4–5 years; approx. 25% lower TCO |
| Dairy UF, chemical cleaning frequency | Every 18–24 hours |
| Ceramic microfiltration | 8–10 years, at 5–10× the capital cost |
| Acid mixed with a chlorine-based cleaner | Releases chlorine gas. Hazardous to personnel; destroys the element. |
Sources: membrane and cleaning-chemistry manufacturer documentation; published dairy process literature.
The same element on the same duty, cleaned two ways, over forty-eight months. Flux recovery after each clean determines the retirement point.