This page covers the 20 mesh count of hook-strip tensioned screen panel: the woven specification per ISO 9044 / screen OEM decks, the particle size it retains, the open area it presents to flow, and the neighbouring counts to step to when the separation requires it.
20 Mesh Specification Row (ISO 9044 / screen OEM decks)
| Mesh count | Wire diameter (mm) | Aperture (mm) | Micron rating (u00b5m) | Open area (%) | Hook |
|---|---|---|---|---|---|
| 20-Mesh | 0.400 | 0.870 | 870 | 46.9 | Double-folded hook |
20 Mesh to Micron & Aperture
| Openings per inch | 20 |
|---|---|
| Aperture (opening width) | 0.87 mm |
| Micron rating | 870 µm |
| Standard wire diameter | 0.4 mm |
| Open area | 46.9 % |
Aperture = (25.4 mm ÷ mesh count) − wire diameter. The micron rating equals the aperture in micrometres; actual retention also depends on particle shape and cake formation.
Wire Diameter Options at 20 Mesh
| Option | Wire dia | Aperture | Micron | Open area | Weight (SS) |
|---|---|---|---|---|---|
| Heavy wire | 0.520 mm | 0.750 mm | 750 µm | 34.9 % | 2.78 kg/m² |
| Standard wire | 0.400 mm | 0.870 mm | 870 µm | 46.9 % | 1.65 kg/m² |
| Fine wire | 0.300 mm | 0.970 mm | 970 µm | 58.3 % | 0.93 kg/m² |
Heavier wire adds strength and abrasion life but closes the aperture; finer wire opens the aperture and raises throughput at the cost of durability. Specify mesh count AND wire diameter to fix the aperture unambiguously.
Open Area & Flow at 20 Mesh
The standard 20 mesh weave presents an open area of about 46.9%. At this count the mesh presents little flow resistance; selection is normally driven by particle retention and mechanical strength rather than pressure drop.
20 Mesh Cloth Weight
Standard 20 mesh stainless cloth weighs approximately 1.65 kg/m² (density 7.93 g/cm³ basis; brass and copper weave roughly 10% heavier, aluminum about one third). Use this figure for roll handling and freight estimation.
Typical Applications for 20 Mesh Hook-Strip Tensioned Screen Panel
20 mesh hook-strip tensioned screen panel is commonly specified for general straining and sieving, paint and coating filtration, grease filters, insect screening, grain cleaning and pre-filtration ahead of fine media.
Plain, Twill or Dutch Weave at This Rating?
Plain square weave is the standard at this count: every opening is a true square of the stated aperture, retention is absolute for hard spherical particles, and the cloth is easy to clean.
What Hook-Strip Tensioned Screen Panel Does
Screening aggregates, ore, coal and recycled material on vibrating screen decks with woven wire panels whose folded hook strips let the panel be side-tensioned tight across the deck.
Fitting & Care
- Fit new rubber channel strips on the crowned support bars before tensioning.
- Tension evenly from both sides and re-check after the first hours of running.
