Analysis of the reasons why the security filter element is sucked flat-Hezhong Environment (Beijing) Co., Ltd. was established in 2003

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Analysis of the reasons why the security filter element is sucked flat

Published Time:

2022-09-14

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Security Filter Principle

Security filters, also known as precision filters, are widely used in the water treatment industry. Their housings are typically made of stainless steel and contain one or more filter cartridges. Under pressure, the raw liquid passes through the filter media, leaving the residue on the pipe wall. The filtered liquid flows out through the filter media, achieving the filtration purpose. The filtration pore size varies depending on the filter media, generally ranging from 0.5 to 120μm. There are many types of filter cartridges, such as pleated cartridges, wound cartridges, high-flow cartridges, and activated carbon cartridges.

Reasons for Security Filter Cartridge Collapse

Security filters are usually installed before pressure vessels to remove particles with turbidity above 1 degree, ensuring the incoming water meets the requirements of downstream equipment. However, after a period of use, the filter cartridges may collapse. The main reasons for this are:

1. The filter cartridge has been in use for too long and has not been replaced in time

Failure to clean and replace the filter cartridge in time increases the resistance of the raw water passing through the filter cartridge. During the operation of the high-pressure pump, a vacuum state occurs inside the security filter, causing the filter cartridge to collapse.

Precision filters are generally replaced when the inlet and outlet pressure difference is 0.1-0.15mpa, typically every 3-4 months.

2. Insufficient Support of the Filter Cartridge Skeleton

Insufficient support of the skeleton results in poor pressure resistance, causing the filter cartridge to collapse with a slight increase in pressure.

3. Improper Selection of Filter Cartridge and Inappropriate Filtration Accuracy

Inappropriate selection of filtration accuracy; not all systems are suitable for high-precision filter cartridges. In the case of poor water quality, selecting a filter cartridge with too large a pore size or exceeding its maximum allowable working pressure can also lead to filter cartridge collapse.

4. Inappropriate Inlet Water Pressure

Fluctuations in inlet water pressure can also cause the filter cartridge to collapse.