Common Mesh Sizes Used in Last Chance Filters

Q: Mesh

Types of Mesh Weave Calculating Pressure Drop Common Mesh Sizes (you are here)

Basic Principles

How to spec your mesh

What micron rating do I need

Why are Last Chance Filters so important

Mesh

Types of Mesh Weave

Calculating Pressure Drop

Common Mesh Sizes (you are here)

Choosing the right mesh size is critical to perform efficient filtration of particles. The following guide will present an understanding of common mesh specifications, from mesh types to aperture sizes and open area percentage.

Mesh Number

First off is the ‘mesh number,’ which simply denotes how many openings appear within every inch of the mesh. Picture a 100-mesh product; this means you will find exactly 100 spaces or apertures per single linear inch.

Weave Types

Mesh woven styles vary based on intended applications delivering specific attributes like backwash efficiency and low pressure drop. Click here to go more in depth on this subject.

Aperture

The meshes openings known as apertures define the filter’s performance level—they’re measured both in millimetres (mm) and microns (μm) in the table below. We have another article explaining how to spec an aperture for your mesh.

Mesh Thickness

As it says on the tin, the meshes overall thickness. This parameter can be used to predict a mesh’s overall strength. Typically, the thicker, the stronger it is to withstand higher differential pressure levels. However, greater thickness might will also lead to higher flow impedance—balance is key!

Open Area Percentage

Open area percentage (OAP) relates directly with the mesh’s ability to process high demands—it represents openings in comparison with the total screen area. A higher OAP means less obstruction for fluid flow creating a lower pressure drop and ability to handle higher flow rates.

Mesh Type	Weave Type Aperture	Aperture (mm)	Aperture (micron)	Mesh Thickness (mm)	Open Area %
2x2	Plain	11.1	11100	3.2	0.764
3x3	Plain	6.867	6867	3.2	0.658
4x4	Plain	5.45	5450	1.8	0.737
4x4	Plain	5.1	5100	2.5	0.645
4x4	Plain	4.75	4750	3.2	0.56
5x5	Plain	4.08	4080	2	0.645
6x6	Plain	3.333	3333	1.8	0.62
6x6	Plain	2.983	2983	2.5	0.497
7x7	Plain	2.919	2919	1.42	0.647
8x8	Plain	2.718	2718	0.914	0.733
8x8	Plain	2.465	2465	1.42	0.603
8x8	Plain	2.275	2275	1.8	0.513
10x10	Plain	1.98	1980	1.12	0.608
10x10	Plain	1.83	1830	1.42	0.519
10x10	Plain	1.64	1640	1.8	0.417
12x12	Plain	1.667	1667	0.9	0.62
12x12	Plain	1.557	1557	1.12	0.541
14x14	Plain	1.564	1564	0.5	0.743
14x14	Plain	1.414	1414	0.8	0.608
14x14	Plain	1.364	1364	0.9	0.565
16x16	Plain	1.308	1308	0.56	0.678
16x16	Plain	1.233	1233	0.71	0.603
16x16	Plain	1.188	1188	0.8	0.56
16x16	Plain	1.138	1138	0.9	0.513
16x16	Plain	1.028	1028	1.12	0.419
18x18	Plain	1.177	1177	0.468	0.696
18x18	Plain	1.011	1011	0.8	0.513
18x18	Plain	0.961	961	0.9	0.464
18x18	Plain	0.911	911	1	0.417
20x20	Plain	0.915	915	0.71	0.519
20x20	Plain	0.82	820	0.9	0.417
20x20	Plain	0.77	770	1	0.368
22x22	Plain	0.935	935	0.44	0.655
24x24	Plain	0.658	658	0.8	0.387
28x28	Plain	0.552	552	0.71	0.37
30x30	Plain	0.682	682	0.33	0.648
30x30	Plain	0.623	623	0.448	0.541
30x30	Plain	0.567	567	0.56	0.448
34x34	Plain	0.497	497	0.5	0.443
36x36	Plain	0.482	482	0.448	0.466
36x36	Plain	0.456	456	0.5	0.417
40x40	Plain	0.411	411	0.448	0.419
44x44	Plain	0.357	357	0.44	0.383
50x50	Plain	0.308	308	0.4	0.368
60x60	Plain	0.263	263	0.32	0.387
70x70	Plain	0.287	287	0.152	0.625
70x70	Plain	0.223	223	0.28	0.377
70x70	Plain	0.203	203	0.32	0.313
80x80	Plain	0.193	193	0.25	0.368
80x80	Plain	0.178	178	0.28	0.313
84x84	Plain	0.239	239	0.126	0.627
84x84	Plain	0.212	212	0.18	0.494
100x100	Plain	0.198	198	0.112	0.608
100x100	Plain	0.154	154	0.2	0.368
100x100	Plain	0.142	142	0.224	0.313
120x120	Plain	0.149	149	0.126	0.493
120x120	Plain	0.122	122	0.18	0.33
130x130	Plain	0.152	152	0.086	0.608
145x145	Plain	0.13	130	0.09	0.552
145x145	Plain	0.112	112	0.126	0.41
150x150	Plain	0.106	106	0.126	0.394
160x160	Plain	0.123	123	0.072	0.598
165x165	Plain	0.104	104	0.1	0.456
180x180	Plain	0.111	111	0.06	0.62
180x180	Plain	0.091	91	0.1	0.417
200x200	Plain	0.087	87	0.08	0.469
200x200	Plain	0.077	77	0.1	0.368
200x200	Plain	0.071	71	0.112	0.313
230x230	Plain	0.074	74	0.072	0.454
250x250	Plain	0.062	62	0.08	0.368
270x270	Plain	0.058	58	0.072	0.381
300x300	Plain	0.055	55	0.06	0.417
300x300	Plain	0.049	49	0.072	0.33
325x325	Plain	0.05	50	0.056	0.418
325x325	Plain	0.048	48	0.06	0.38
325x325	Plain	0.042	42	0.072	0.291
350x350	Plain	0.043	43	0.06	0.344
400x400	Plain	0.039	39	0.05	0.368
400x400	Plain	0.034	34	0.06	0.278
500x500	Plain	0.026	26	0.05	0.258
250x250	Plain Twill	0.062	62	0.08	0.37
270x270	Plain Twill	0.054	54	0.08	0.33
300x300	Plain Twill	0.045	45	0.08	0.28
300x300	Plain Twill	0.049	49	0.072	0.33
325x325	Plain Twill	0.042	42	0.072	0.29
400x400	Plain Twill	0.039	39	0.05	0.37
400x400	Plain Twill	0.034	34	0.06	0.28
500x500	Plain Twill	0.026	26	0.05	0.26
12x64	Plain Dutch	0.26	260	1.38	0.62
12x72	Plain Dutch	0.26	260	1.16	0.62
16x80	Plain Dutch	0.21	210	1.11	0.57
24x110	Plain Dutch	0.112	112	0.855	0.6
30x150	Plain Dutch	0.09	90	0.59	0.6
40x200	Plain Dutch	0.07	70	0.46	0.59
50x250	Plain Dutch	0.056	56	0.368	0.59
80x400	Plain Dutch	0.04	40	0.267	0.55
80x700	Twill Dutch	0.034	34	0.254	0.4
165x800	Twill Dutch	0.024	24	0.254	0.47
165x1400	Twill Dutch	0.015	15	0.148	0.37
200x1400	Twill Dutch	0.011	11	0.148	0.33
325x2300	Twill Dutch	0.007	7	0.086	0.34
128x36	Reverse Plain Dutch	0.095	95	1.002	0.55
170x50	Reverse Plain Dutch	0.082	82	0.75	0.54
290x75	Reverse Plain Dutch	0.05	50	0.49	0.53
625x124	Reverse Plain Dutch	0.025	25	0.3	0.55