Micronic Wire Mesh - Technical Information

Twp offers the finest precisely woven stainless steel filter cloth. This cloth is provided in two types, which differ in appearance and application.

The Dutch weaves (PDW, TDW) are thick, strong; light tight meshes which are used primarily in fluid, vacuum, and pressure filtration of liquids and gases. These are woven to precise tolerances and their openings are actually tiny curved, triangular tunnels.

The square weaves (PSW, TSW) are woven with straight through square holes, are thin and flexible, and are often used in the separation and classification of solid particles. These square weaves have very high flow rates and square see through openings.

Mesh
Number of openings per linear inch, measured from the center of one wire to a point one inch distant

Wire Diameter
The thickness of the wire in inches.

Opening
The hole size which is the distance between two adjacent parallel wires.

Open Area Percent
The proportion of open space in a section of screen expressed as a percentage.

Absolute Filtration Rating
A measure of retention, expressed in microns, that specifies the equivalent diameter of the smallest particle from which the filter has a retention of 100%. In actual practice, most manufacturers assign absolute ratings on the basis of retention in the range from 98% - 99.999999%.

Nominal Filter Rating
A measure of retention, expressed in microns, that specifies the equivalent diameter of the smallest particle for which the filter has a retention somewhere in the range of 60-90%.

Warp Wire Diameter
The wires running the long way of the material as woven (long wires).

Shute Wire Diameter
The wires running across the width of the cloth as woven (short wires).

Micron
A unit of length in the metric system. One micron is equivalent to 0.00003937 of one inch.

Micronic Wire Mesh - Uses

• Particle separation and sifting - use PSW and TSW weave types
• Fuel filters - use TSW
• Hydraulic fluid filters - use TDW and PDW weave types
• Gas diffusers - use TDW and PDW weave types single layer or stacked
• Breather vents

*Note: if you need non-fraying micronic meshes, please see sintered wire mesh section.

Micronic Wire Mesh - Look and Feel

Choose a material, a weave type and an opening size or ask our staff to check your samples.

Materials

Alloy Type 304 or Type 316
T304 is the basic stainless alloy, and unless otherwise specified it is assumed that this type is acceptable. Also called 18-8 due to 18% chromium and 8% nickel. T304 melts at 2600 degrees F (1430 C) but its maximum recommended temperature for continuous service is 1450 degrees F. (790 C) and is useful for intermediate service up to 1650 degrees F (900 C). Its' uses include: sorting and screening of abrasives, liquids, powders and other solids.

T316 is a special stainless alloy due to the addition of 2% molybdenum. This increases its resistance to corrosion by salts, acids and seawater. Also called 18-10 due to 18% chromium and 10% nickel. T316 melts at 2500 degrees F (1375 C) but its maximum recommended temperature for continuous service is 1500 degrees F. (815 C) and is useful for intermediate service up to 1650 degrees F (900 C). Its' uses include: processing of oils, chemicals, food and pharmaceuticals.

In general, T316 can always be substituted for T304.

Weave type

Micronic (Dutch Weaves PDW and TDW)
The dutch weaves (PDW, TDW) are thick, strong; light-tight meshes which are used primarily in fluid, vacuum, and pressure filtration of liquids and gases. These are woven to precise tolerances and their openings are actually tiny curved, triangular tunnels.

Micronic (Square Weaves PSW and TSW)
The square weaves (PSW, TSW) are woven with straight through square holes, are thin and flexible, and are often used in the separation and classification of solid particles. These square weaves have very high flow rates and square see through openings.

Opening Size

Absolute Filtration Rating
A measure of retention, expressed in microns, that specifies the equivalent diameter of the smallest particle from which the filter has a retention of 100%. In actual practice, most manufacturers assign absolute ratings on the basis of retention in the range from 98% - 99.999999%.

Nominal Filter Rating
A measure of retention, expressed in microns, that specifies the equivalent diameter of the smallest particle for which the filter has a retention somewhere in the range of 60-90%. Nominal filter rating is imprecise.

Micronic Wire Mesh - Discs

• 500 standard disc diameters
• Same day delivery on stock items
• Tolerance to +/- .001 inch
• Clean edged cutting on wire mesh as fine as .00078 inch wire diameter
• Special diameters in three days

Our "Quot-O-Matic" Disc pricer can get you quick quotes by phone.

To get an email quote for micronic mesh discs:
You will need to indicate material, disc diameter, mesh and quantity or contact us by phone or fax.

Micronic Wire Mesh - Cutting

Micronic wire meshes are easily cut with sharp hand tools.

TWP has a minimum order of $150 for custom cut micronic wire mesh discs, rectangles, shallow cups or slit ribbons.

Micronic Wire Mesh - Samples

TWP Inc. will provide samples for your testing and inspection. The cost is $8 per sample ordered (plus UPS Charges about $3.00 total for up to 10 samples by UPS ground - USA).

For the quickest service, please order your samples on-line.

All micronic samples are 3” x 3” with the exception of stainless steel 635 mesh which is a one inch square.

Micronic wire mesh uses | Cutting instructions | Choosing a micronic wire mesh based on its look and feel | Micronic wire mesh discs | Micronic wire mesh samples