Y-type filter (water filter) is a series of coarse filter pipe can also be used for gas or other media large particles filter installed in the pipeline can remove the fluid in the larger solid impurities, so that machinery and equipment (including compressors, pumps Etc.), the instrument can work and run, to stabilize the process, to ensure the role of safe production. Y-type filter (water filter) has the advantages of simple production, easy installation and cleaning, large amount of pollutants.
Principles of Filter Testing
※ bubble point method test principle: When the filter membrane and filter with a certain solution completely infiltrated, and then through the gas source in the side of the pressure (we have an instrument inside the intake control system, can stabilize the pressure, adjust the intake) The pressure increases, the gas from the side of the membrane release, showing the side of the membrane size, the number of bubbles ranging from the instrument to determine the corresponding pressure is the bubble point.
※ Diffusion flow test principle: Diffusion flow test is when the gas pressure in the filter bubble point value of 80%, then there has not been a large number of gas perforation and over, but a small amount of gas dissolved in the first phase of the diaphragm , And then from the liquid phase diffusion to the other side of the gas phase, this part of the gas known as the diffusion flow.
※ Why is the method of diffusion flow better: bubble point value is only a qualitative value, from the beginning to the final blister bubble group is a relatively long process can not be accurately quantified. While the measured diffusion flow value is a quantitative value, not only can accurately determine the integrity of the filter, but also reflect the membrane porosity, flow and effective filtration area and other issues, which is why foreign manufacturers are now used Causes of Integrity Testing by Diffusion.
※ Water intrusion method Test principle: water intrusion method for hydrophobic filter test, hydrophobic membrane resisting water, the smaller the pore size, the water squeezed into the hydrophobic membrane in the greater the pressure required. So under a certain pressure, measured in the water squeezed into the filter to determine the filter pore size.
