Security filters are usually installed after other filtration equipment, such as quartz sand filters, activated carbon filters, ion exchangers, etc., or before reverse osmosis membranes, ultrafiltration membranes, nanofiltration membranes, etc. Its function is to further treat small impurities in water and prevent impurities that may exist in upstream processes from entering downstream processes through the water distributor.

The performance characteristics of security filters include:

1. High filtration accuracy, uniform pore size of filter element, capable of removing small impurity particles.
2. Low filtration resistance, high flux, strong pollutant interception ability, and long service life.
3. The filter element material has high cleanliness and no pollution to the filtering medium, ensuring the stability of the effluent water quality.
4. Resistant to chemical solvents such as acid and alkali, suitable for various environments and usage scenarios.
5. The filter element has high strength, high temperature resistance, and is not easily deformed, ensuring the long-term stable operation of the filter