{"id":4298,"date":"2026-06-16T20:55:29","date_gmt":"2026-06-16T12:55:29","guid":{"rendered":"https:\/\/ballvalves.tw\/?p=4298"},"modified":"2026-07-24T13:36:42","modified_gmt":"2026-07-24T05:36:42","slug":"tableau-de-correspondance-entre-la-taille-des-mailles-dun-filtre-et-le-nombre-de-microns","status":"publish","type":"post","link":"https:\/\/ballvalves.tw\/fr\/y-strainer-mesh-size-to-micron-chart\/","title":{"rendered":"Guide des mailles des filtres en Y : microns, d\u00e9bit et perte de charge"},"content":{"rendered":"\n
\"316<\/figure>\n\n\n\n

TL;DR \/ Quick Reference Summary<\/h2>\n\n\n\n
Screen<\/th>Nominal opening<\/th>Millimetres<\/th>Inches<\/th>First engineering check<\/th><\/tr><\/thead>
20 mesh<\/td>\u2248840 \u00b5m<\/td>\u22480.840 mm<\/td>\u22480.0331 in<\/td>Coarse debris capture with more open area and lower clogging tendency<\/td><\/tr>
60 mesh<\/td>\u2248250 \u00b5m<\/td>\u22480.250 mm<\/td>\u22480.0098 in<\/td>Medium capture where downstream passages require finer protection<\/td><\/tr>
100 mesh<\/td>\u2248150 \u00b5m<\/td>\u22480.150 mm<\/td>\u22480.0059 in<\/td>Fine capture only where the system can accept higher fouling and pressure-drop risk<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

These are useful nominal references, not guaranteed apertures for every screen. Mesh count describes how many openings occur per linear inch; it does not define wire diameter, weave, open area, screen strength or the assembled strainer’s flow coefficient. ASTM E11 controls nominal apertures and tolerances for test-sieve cloth, while an industrial Y-strainer screen must be confirmed against its supplier’s actual construction. The practical rule is simple: select the coarsest screen that still protects the smallest critical downstream passage. Choosing by mesh number alone can produce excessive differential pressure (\u0394P), cavitation at a pump suction or inadequate equipment protection.<\/p>\n\n\n\n

A disciplined selection sequence prevents most mistakes. First, obtain the allowable particle size from the pump, valve, meter or nozzle manufacturer. Second, identify the contaminant size distribution and expected loading, including start-up debris. Third, shortlist a screen aperture and calculate clean loss at maximum flow. Fourth, repeat the hydraulic check at the planned cleaning trigger. Finally, verify that the screen and support assembly can withstand the supplier’s stated differential-pressure limit. If any input is missing, treat the mesh as provisional. Do not purchase a finer element to compensate for missing process data.<\/p>\n\n\n\n

\"Macro<\/figure>\n\n\n\n

Comprehensive Y-Strainer Screen Conversion Chart<\/h2>\n\n\n\n

The table below uses common nominal plain-weave references. Actual openings can vary with wire diameter and weave, so specify an aperture in microns when the allowable particle size is a hard limit. ASTM E11-24<\/a> defines opening tolerances for test sieves; it does not automatically certify an industrial strainer screen.<\/p>\n\n\n\n

Mesh<\/th>Microns<\/th>mm<\/th>Inches<\/th>Screen type \/ structure<\/th>Typical industrial application<\/th><\/tr><\/thead>
10<\/td>2,000<\/td>2.00<\/td>0.0787<\/td>Perforated plate or heavy woven wire<\/td>Large weld slag and commissioning debris<\/td><\/tr>
12<\/td>1,680<\/td>1.68<\/td>0.0661<\/td>Perforated plate or heavy woven wire<\/td>Coarse mill scale and pipe rust<\/td><\/tr>
14<\/td>1,410<\/td>1.41<\/td>0.0555<\/td>Perforated plate or heavy woven wire<\/td>Coarse pre-straining<\/td><\/tr>
16<\/td>1,190<\/td>1.19<\/td>0.0469<\/td>Perforated plate or heavy woven wire<\/td>General pipeline debris<\/td><\/tr>
18<\/td>1,000<\/td>1.00<\/td>0.0394<\/td>Heavy woven wire, often supported<\/td>Coarse pump protection<\/td><\/tr>
20<\/td>840<\/td>0.840<\/td>0.0331<\/td>Woven liner with support cylinder<\/td>Pump suction and general pipe debris<\/td><\/tr>
25<\/td>710<\/td>0.710<\/td>0.0280<\/td>Woven liner with support cylinder<\/td>Coarse sand and scale<\/td><\/tr>
30<\/td>590<\/td>0.590<\/td>0.0232<\/td>Woven liner with support cylinder<\/td>Pump and utility-water protection<\/td><\/tr>
35<\/td>500<\/td>0.500<\/td>0.0197<\/td>Woven liner with support cylinder<\/td>Fine pipe rust and larger sand<\/td><\/tr>
40<\/td>420<\/td>0.420<\/td>0.0165<\/td>Woven liner with support cylinder<\/td>Pump protection where tighter capture is justified<\/td><\/tr>
45<\/td>354<\/td>0.354<\/td>0.0139<\/td>Woven liner with support cylinder<\/td>General process pre-straining<\/td><\/tr>
50<\/td>297<\/td>0.297<\/td>0.0117<\/td>Woven liner with support cylinder<\/td>Meters and larger control passages<\/td><\/tr>
60<\/td>250<\/td>0.250<\/td>0.0098<\/td>Woven liner with support cylinder<\/td>Control valves, pilots and medium sediment<\/td><\/tr>
70<\/td>210<\/td>0.210<\/td>0.0083<\/td>Woven liner with support cylinder<\/td>Smaller pilot passages and instrumentation<\/td><\/tr>
80<\/td>177<\/td>0.177<\/td>0.0070<\/td>Woven liner with support cylinder<\/td>Solenoid valves and fine control passages<\/td><\/tr>
100<\/td>149<\/td>0.149<\/td>0.0059<\/td>Fine woven liner with support cylinder<\/td>Fine nozzles, meters and instrumentation<\/td><\/tr>
120<\/td>125<\/td>0.125<\/td>0.0049<\/td>Fine woven liner with support cylinder<\/td>Fine process particulates<\/td><\/tr>
140<\/td>105<\/td>0.105<\/td>0.0041<\/td>Fine woven liner with support cylinder<\/td>Small spray passages where specified<\/td><\/tr>
170<\/td>88<\/td>0.088<\/td>0.0035<\/td>Fine woven liner with support cylinder<\/td>Precision nozzle protection<\/td><\/tr>
200<\/td>74<\/td>0.074<\/td>0.0029<\/td>Fine woven liner with support cylinder<\/td>Very small orifices where the device maker requires it<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

The application column is a screening shortlist, not a purchase specification. Start with the downstream equipment maker’s maximum allowable particle size, then check flow, clean \u0394P, expected debris loading and maintenance access.<\/p>\n\n\n\n

Beyond the Chart: Why Mesh Count \u2260 Guaranteed Filtration<\/h2>\n\n\n\n

Mesh count is only the pitch count. In a plain square weave, each pitch contains one opening plus one wire diameter:<\/p>\n\n\n\n

Opening (\u00b5m) \u2248 (25,400 \/ Mesh) \u2212 Wire diameter (\u00b5m)<\/strong><\/p>\n\n\n\n

For the same mesh count, a thicker wire makes a smaller aperture. It also occupies more of the screen face. The approximate geometric open area is:<\/p>\n\n\n\n

% Open area = [Opening \/ (Opening + Wire diameter)]\u00b2 \u00d7 100<\/strong><\/p>\n\n\n\n

Consider two 60-mesh screens. Their pitch is 25,400 \/ 60 = 423.3 \u00b5m.<\/p>\n\n\n\n