Cartridge filters disposable, construction

Disposable cartridge filters should be made of synthetic, non-degradable materials such as nylon or polypropylene. Their construction can be spun-bonded or melt-blown, string-wound, and pleated. These are described below. 

Various materials are used for disposable oil filter elements paper, felt, bulk fibre, wound yam and spun bonds. The impregnated paper element, of pleated form, is still one of the most popular types, as this can provide a cut-off of the required order and also has the necessary strength to withstand the differential pressures that may be involved. This element is arranged annularly in a circular can with perforated inner and outer tubes to produce the cartridge. Similar construction applies in the case of a replaceable unit where the cartridge is permanently fixed inside the outer casing. 

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