A cartridge filter is tubular filtration equipment that is used to remove the solid and other dirt particles from the water. These cartridges are encased within the housing. They are made up of polypropylene because its resists quality to the growth of bacteria. They also can be made of wound string, rigid foam, or pleated film.
There are two categories of cartridge filters –
a) Surface filters
Surface filters are those filters that do not let the solids or contaminants enter through the medium. They restrict them outside the filtered media. Surface filtration refers to the flow of fluid through to a layer of material that restricts particles on the surface. Example: - Cellulose filter
b) Depth filters
Depth filters are those which trap all the contaminants, pollutants, and solids within the media. In comparison to the surface filter, a depth filter is expensive but it has a longer shelf life and the mechanical strength of the filter medium is high. Example: - String wound filter
String wound filter cartridges
String wound filter cartridges have multiple layers of string wound tightly around a support core in diamond-shaped patterns to prevent the breakage of short fibers. As the liquid passes through the cartridge, the woven layers of string on the outer diameter filter out bigger sediment particles those greater than or equal to the micron rating. Particles that are smaller than the micron rating are then filtered out by the layers near the polypropylene core in the middle of the cartridge. In comparison to other standard elements, string wound filter cartridges offer several added benefits, such as:
• True depth filtration
• Higher efficiency
• Extended service life
• Lower pressure drop
• Greater solids holding capacity
String wound cartridge filters are popularly used for liquid filtration in industries like food and beverage, pharmaceuticals, water treatment, mining, chemical, oil & gas, gas and air, flue gas, Desalination, and automotive.
Conclusion
The benefits of a string wound cartridge filter are endless. By depth filtration, the string filter removes impurities present in water required in industries like water treatment, automotive, and desalination as well as provides other several benefits like great solids holding capacity, higher efficiency, and extended service life.
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