Regarding the selection of filters for hydraulic systems

I work in filtration; I was wondering why you don’t approach equipment suppliers? What kind of filters were used in your equipment before?

The poster selected the filter screen based on the filtration accuracy of 46# anti-wear hydraulic oil, referring to the table below. Mesh size, Particle size in um, Mesh size, Particle size in um, Mesh size, Particle size in um: 5, 3900; 140, 104; 1600, 10; 10, 2000; 170, 89; 1800, 8; 16, 1190; 200, 74; 2000, 6.5; 20, 840; 230, 61; 2500, 5.5; 25, 710; 270, 53; 3000, 5; 30, 590; 325, 44; 3500, 4.5; 35, 500; 400, 38; 4000, 3.4; 40, 420; 460, 30; 5000, 2.7; 45, 350; 540, 26; 6000, 2.5; 50, 297; 650, 21; 7000, 1.25; 60, 250; 800, 19. 80, 178; 900, 15; 100, 150; 1100, 13; 120, 124; 1300, 11. 1. Mesh size refers to the number of openings per square inch of the filter screen – 50 mesh means there are 50 openings per square inch, 500 mesh means 500 openings, and the higher the mesh size, the more openings there are. In addition to indicating the mesh size of the sieve, it is also used to represent the particle size of particles that can pass through the sieve; the higher the mesh number, the smaller the particle size. 2. The size of powder particles is referred to as particle size. Due to the complex shape of particles, there are usually several ways to represent them, such as sieving particle size, sedimentation particle size, equivalent volume particle size, and equivalent surface area particle size. The screening particle size refers to the size of the holes in the sieve through which particles can pass, and it is expressed as the number of holes per inch (25.4 mm) of sieve width, which is why it is called “mesh count”. Currently, there are no unified technical standards for powder particle size at either the domestic or international level; each company has its own definitions and methods for expressing particle size. There are different standards for screen specifications in various ** and different industries; therefore, the meaning of \"mesh size\" is also difficult to standardize. Currently, in the international community, the calculated diameter of equivalent volume particles is commonly used to represent particle size. Expressed in μm or mm. The table below shows the comparison between the mesh sizes and particle sizes (μm) commonly used in our country. Mesh size, microns Mesh size, microns Mesh size, microns Mesh size, microns Mesh size, microns 2.5 7925 12 1397 60 245 325 47 3 5880 14 1165 65 220 425 33 4 4599 16 991 80 198 500 25 5 3962 20 833 100 165 625 20 6 3327 24 701 110 150 800 15 7 2794 27 589 180 83 1250 10 8 2362 32 495 200 74 2500 5 9 1981 35 417 250 61 3250 2 10 1651 40 350 270 53 12500 1

In general hydraulic systems, oil filtration is carried out using tight-fitting filters or custom-made filters; metal filter screens are typically employed, and depending on the operational requirements of the hydraulic system, screens with a mesh size of around 200 mesh are often used

200 mesh is around 70 microns, so it seems that this precision isn’t very high either, right?

Because the normal clearance of the push oil cylinder is between 0.02 and 0.15