Can the filter cartridge of a security filter be cleaned and reused?

I. Disposable Only — Cannot Be Cleaned Reused (Most Commonly Used On-site)

PP melt-blown filter cartridges

Polypropylene pleated filter cartridges

Nylon and PES pleated microporous filter cartridges

Reasons:

They adopt deep pore filtration. Impurities penetrate into the internal fibers of the cartridge and cannot be washed out by water cleaning.

Cleaning will damage the fiber structure and enlarge the pore size, resulting in filtration failure. The downstream RO membrane is prone to clogging and scratching.

Although the surface looks clean after washing, its interception capacity is actually disabled, and bacteria are likely to breed.

These are all disposable consumables. Replace them directly once clogged; cleaning and reuse are not recommended.

II. Cleanable and Reusable (Special Industrial Types)

String wound filter cartridges (cotton thread, glass fiber wound)

Slightly clogged cartridges can be rinsed under low pressure or soaked simply, and can be reused 1–2 times for a short period, though the dirt holding capacity will decline.

Stainless steel sintered / metal pleated filter cartridges

Can be backwashed under high pressure, ultrasonically cleaned, and soaked with acid and alkali.

Reusable after repeated regeneration, with a service life of 1 to 3 years.

PE sintered and PTFE rigid sintered filter cartridges

Featuring rigid structure and stable pore size, they can be cleaned and regenerated, suitable for chemical and special working conditions.

III. Practical Operation Suggestions

For 5μm PP cartridges used in pure water and reverse osmosis pre-filtration: do not clean at all, replace as disposable.

Under poor water quality and heavy sediment conditions: reuse is even more inadvisable. Saving cost on filter cartridges may damage the RO membrane, leading to greater losses.

Only metal and rigid sintered filter cartridges are suitable for cleaning and repeated use.