Filtering precision of the filter
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This post was last edited by sxf1028102800 on 2015-12-30 12:02. I have a gentle question: what does it mean when the filtering precision of the filter is 100um? Is 100 good or bad for filtering? What is the purpose of the filter element? Does a lower mesh number mean higher filtration precision? Thank you
Only particles smaller than 100 microns are allowed to pass through
Impurities larger than 0.1mm can be filtered; the decision depends mainly on the application
A 100um filter is not considered very fine; many devices use filters with a size of 20um, and we also have ones with a size of 10um.
It can intercept impurities larger than 100um; nowadays, many systems are capable of handling particles as small as 1u~
It refers to the pore size of the filter cloth. Whether the filtration is good depends on what it is being used for. 5um corresponds to 2500 mesh; the lower the mesh number, the lower the filtration precision.
Table of mesh size and particle size in microns: Mesh size – Particle size in microns: 5 – 3900; 10 – 2000; 16 – 1190; 20 – 840; 25 – 710; 30 – 590; 35 – 500; 40 – 420; 45 – 350; 50 – 297; 60 – 250; 80 – 178; 100 – 150; 120 – 124; 140 – 104; 170 – 89; 200 – 74; 230 – 61; 270 – 53; 325 – 44; 400 – 38; 460 – 30; 540 – 26; 650 – 21; 800 – 19; 900 – 15; 1100 – 13; 1300 – 11; 1600 – 10; 1800 – 8; 2000 – 6.5; 2500 – 5.5; 3000 – 5; 3500 – 4.5; 4000 – 3.4; 5000 – 2.7; 6000 – 2.5; 7000 – 1.25. In general, the higher the mesh size, the higher the precision. However, it depends on the application area – it’s not always better to choose a higher precision level. The air filter elements we use have a particle size of 3 μm. If the precision were even higher, the inhalation resistance would increase, leading to higher energy consumption for the equipment.
The relationship between the count and micrometers mentioned by this friend is correct. Filtering air and liquids is different: air filtration requires hydrophobic materials, while water filtration needs hydrophilic materials. It mainly depends on the occasion; as long as it’s suitable, that’s fine.
100 mesh is acceptable; generally, 100 mesh means there are about 100 holes per square centimeter
It still depends on where you use it for filtering. Hair strands are generally around 60-80 micrometers; you can make a macroscopic comparison