Locker Wire Weavers Ltd

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Buyers Guide

ISO 4783-1 is the international standard relating to the choice of aperture size and wire diameter combinations.

Wire Mesh Designations

MESH No.

Plain Weave Twill Weave

Mesh number denotes the number of openings or wires per English inch (25.4mm) in both directions counting from the centre of any wire to a point exactly one inch distant.

The wires running lengthways during manufacture are referred to as warp wires, and the wires that run across the width of the cloth are referred to as weft or shoot wires.

PLAIN WEAVE (PW).

Each weft wire passes over one and under one warp wire, and each warp wire passes over one and under one weft wire. (See Figure 1).

TWILL WEAVE (TW).

Each weft wire passes over two and under two warp wires, and each warp wire passes over and under two weft wires. (See Figure 2).

APERTURE WIDTH (w).

The distance between two adjacent warp or weft wires measured in the projected plain at mid positions.

The aperture width (in mm) is calculated according to the following equation:
aperturecalc

Aperture size and wire diameter calculations are according to ISO 4783-2

Open Screening Area (Ao)

Percentage of the surface of all the apertures in the total screening surface calculated using the following equation:
openingcalc

Mass per unit area (Kg/M2)

The nominal mass per unit area can be calculated from the following equation:
masscalc

Standard metal and alloy availability

The table below gives a general guide to the standard materials available and their associated wire diameter limitations.

Available Wire Mesh Materials & Associated Limiting Wire Diameters

Type of Material

Limiting Wire Diameter

Stainless Steel 304,316 and low carbon grades All specifications
Stainless Steel High Tensile (For Reverse Dutch Weaves) 0.20mm
Plain or Mild Steel 0.132mm
Galvanised Mild Steel 0.17mm
Aluminium 0.224mm
Copper 0.05mm
Brass 0.04mm
Phosphor Bronze 0.035mm
Pure Nickels & Alloys 0.035mm
Pure Silver All specifications
*Monel 400 0.04mm
*Incoloy, Inconel Heat Resistant Specifications 0.112mm

 

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Locker Wire Weavers Ltd (Reg No. 420247) is a specialist operating division of Locker Group Limited.

 

Call us on +44 (0)1925 406600 

 

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