Wholesale sediment filter introduces the testing principle of the filter

Time：

2022-05-28

The water intrusion method is dedicated to the testing of hydrophobic filter elements. The hydrophobic membrane resists water, and the smaller the pore size, the greater the pressure required to squeeze water into the hydrophobic membrane. Therefore, under a certain pressure, the flow rate of water squeezed into the filter membrane is measured to determine the pore size of the filter element.

Do you know what the test principle of the filter is? Wholesale sediment filter editor will take you to a simple understanding.
1. Test principle of water intrusion method: The water intrusion method is specially used for the test of hydrophobic filter elements. The hydrophobic membrane resists water, and the smaller the pore size, the greater the pressure required to squeeze water into the hydrophobic membrane. Therefore, under a certain pressure, the flow rate of water squeezed into the filter membrane is measured to determine the pore size of the filter element.
2. Test principle of diffusion flow method: Diffusion flow test means that when the gas pressure is 80% of the bubble point value of the filter element, there is not a large amount of gas perforation, but a small amount of gas first dissolves into the liquid phase diaphragm and then diffuse from the liquid phase to the gas phase on the other side, this part of the gas is called diffusion flow.

3. Test principle of bubble point method: when the filter membrane and filter element are completely soaked with a certain solution, and then pressurized on one side by the air source (there is an air intake control system in our instrument, which can stabilize the pressure and adjust the air intake), and the As the pressure increases, the gas is released from one side of the filter membrane, showing that bubbles of different sizes and numbers appear on one side of the membrane, and the corresponding pressure value determined by the instrument is the bubble point.
The above is the editor of Wholesale sediment filter: a brief introduction to the knowledge of the testing principle of the filter.