The filtration accuracy of the 20 μ m-2 Filter Element is 20 microns, belonging to the category of medium precision filtration, which can effectively intercept pollutants such as pollen, some bacteria (such as Cryptosporidium), colloidal particles, etc.

**Typical application scenarios**

1. * * Pharmaceutical industry * *: Used for pre-treatment of injection water, removal of particles from drug solutions, and combined with terminal sterilization filter cartridges (0.22 μ m) to form a multi-stage filtration system.

2. * * Food and beverage * *: Clarify and filter beer and juice to avoid excessive burden on subsequent pasteurization processes.

3. * * Electronic Ultra Pure Water * *: As a pre protective device for reverse osmosis (RO) systems, it prevents membrane components from being scratched by large particles.

4. * * Industrial circulating water * *: Intercept impurities in cooling tower water to extend equipment heat transfer efficiency.

**Selection and maintenance points**

1. * * Adaptability check * *: It is necessary to confirm the interface standard of the filter element (such as 222/226 bayonet, flat press) to avoid mismatch with the filter housing. According to data from a certain supplier, installation errors of non-standard filter elements can lead to a system leakage rate of up to 15%.

2. * * Life assessment * *: When the pressure difference rises to 3 times the initial value or the effluent turbidity is greater than 0.1NTU, it needs to be replaced. The normal usage cycle is 3-6 months.

3. * * Cleaning and regeneration * *: Only applicable to surface washable filter cartridges. It is recommended to use a 0.3% sodium hydroxide solution for backwashing, but repeated cleaning for more than 5 times will significantly reduce the retention rate.