Filter

“\"Mesh size\" is a unit for the diameter of sieve pores, namely the number of pores per square inch. Now it is directly expressed in terms of aperture size, that is, in micrometers (μm). (Note: The topic of the original poster’s post contains fewer than 4 characters, which violates the forum rules; it is recommended to make changes.) This post was last edited by brucehan on 2009-2-23 at 16:06

40 mesh is equivalent to 420 microns.

The higher the mesh number, the more holes there are per unit area; 10 mesh is equivalent to the screen windows used in homes

It refers to the filtration precision, which is essential when placing orders or selecting designs! It is the most important indicator for filters; another indicator is pressure drop. . . . .

The term \"mesh size\" refers to the particle size or fineness of a material. It is generally defined as the number of openings per 1 inch * 1 inch area, that is, the number of pores in the sieve. The mesh size indicates how many of these pores the material can pass through; for example, 200 mesh means that the material can pass through a sieve with 200 pores per 1 inch * 1 inch area. By the same logic, the higher the mesh number, the finer the particle size of the material; the lower the mesh number, the coarser the particle size. 　　The specifications of standard sieves vary from country to country. The commonly used Taylor system uses the number of holes per inch as the sieve size, which is referred to as mesh count. For example, a 100-mesh sieve means there are 100 sieve holes per inch of the sieve mesh.

The sieve pore size corresponds to a standard mesh count:
Sieve pore size: 4.75 mm – Standard mesh count: 4
Sieve pore size: 4.00 mm – Standard mesh count: 5
Sieve pore size: 3.35 mm – Standard mesh count: 6
Sieve pore size: 2.80 mm – Standard mesh count: 7
Sieve pore size: 2.36 mm – Standard mesh count: 8
Sieve pore size: 2.00 mm – Standard mesh count: 10
Sieve pore size: 1.70 mm – Standard mesh count: 12
Sieve pore size: 1.40 mm – Standard mesh count: 14
Sieve pore size: 1.18 mm – Standard mesh count: 16
Sieve pore size: 1.00 mm – Standard mesh count: 18
Sieve pore size: 0.850 mm – Standard mesh count: 20
Sieve pore size: 0.710 mm – Standard mesh count: 25
Sieve pore size: 0.600 mm – Standard mesh count: 30
Sieve pore size: 0.500 mm – Standard mesh count: 35
Sieve pore size: 0.425 mm – Standard mesh count: 40
Sieve pore size: 0.355 mm – Standard mesh count: 45
Sieve pore size: 0.300 mm – Standard mesh count: 50
Sieve pore size: 0.250 mm – Standard mesh count: 60
Sieve pore size: 0.212 mm – Standard mesh count: 70
Sieve pore size: 0.180 mm – Standard mesh count: 80
Sieve pore size: 0.150 mm – Standard mesh count: 100
Sieve pore size: 0.125 mm – Standard mesh count: 120
Sieve pore size: 0.106 mm – Standard mesh count: 140
Sieve pore size: 0.090 mm – Standard mesh count: 170
Sieve pore size: 0.0750 mm – Standard mesh count: 200
Sieve pore size: 0.0630 mm – Standard mesh count: 230
Sieve pore size: 0.0530 mm – Standard mesh count: 270
Sieve pore size: 0.0450 mm – Standard mesh count: 325
Sieve pore size: 0.0374 mm – Standard mesh count: 400 　　

Adding a plus or minus sign in front of the mesh number indicates whether to skip the mesh with that number. Negative numbers indicate mesh sizes through which particles can pass, that is, particle sizes smaller than the mesh size ； A positive value indicates that the mesh with that mesh size must not be missed, meaning the particle size is greater than the mesh size. For example, if the particles are -100 mesh to +200 mesh, this means that they can pass through a 100-mesh sieve but not through a 200-mesh sieve. When screening particles of such mesh sizes, the sieve with the higher mesh number (200) should be placed below the sieve with the lower mesh number (100); the particles that remain on the sieve with the higher mesh number (200) are those with a size of -100 to 200 mesh.

Yes, the mesh count is the main parameter to consider when selecting filters – it refers to the number of holes per square inch. Specifically, it depends on the standards and the specifications provided by the manufacturer; generally, these values are the same