Stainless Steel Filter Mesh

Stainless steel filter mesh

Dashang Wire Mesh provides a full range of stainless steel filter mesh (also known as dutch woven mesh, o precision micronic filter mesh), with a filtration accuracy range from 300 microns to 2 microns, in line with ASTM E2814 and GB/T 21648 standards. It is made of high-quality wire materials such as 304, 304L, 316, 316L, 321, 904L, woven in warp and weft directions, and has excellent acid and alkali resistance and corrosion resistance. The filter mesh is mainly used for solid separation and clear liquid filtration, such as fuel or hydraulic oil cleaning, or for water treatment.

Unlike square mesh, the warp and weft wire diameters and mesh counts of dutch woven mesh are different. Dutch woven mesh is usually interwoven with coarse warp and fine weft wires, and the mesh surface presents vertical raised stripes.The most common weaving types of filter mesh are plain Dutch mesh, twill Dutch mesh and reverse Dutch mesh.

Plain Dutch weave

The plain Dutch weave can accommodate high flow rates with relatively low pressure drop.

When weaving, the wires are woven with each warp and weft wire passing over and under one wire. The weft wires are smaller in diameter than the warp wires and are arranged close together, creating a tight weave.

Plain Dutch weave Specifications:

Twill Dutch Weave

The twill Dutch weave provides the best particle retention in the wire mesh. "Twill" means that the warp and weft wires alternately pass through two wires. "Dutch" means that thicker warp wires and thinner weft wires are used. In the twill Dutch double weave, the weft wires are pulled so tight that there is always one weft thread above and one below the warp wires, resulting in a weave that completely covers the warp wires. The extremely tortuous flow path geometry ensures excellent particle size retention.

Twill Dutch weave Specifications:

Reverse Dutch Weave

The opposite of the wire arrangement of a plain Dutch weave, where the finer warp wires are placed closely together and the thicker weft wires are woven at set intervals. This filter mesh is mechanically strong, has high throughput, and performs particularly well in high-pressure vertical and horizontal applications where backwashing and cake removal are important.

Reverse dutch weave specifications:

In stainless steel dutch woven mesh (micron filter mesh) there are the following parameters that determine the accuracy of the filter mesh, "nominal filtration", "absolute filtration" and "geometric pore size". These three terms describe different concepts of pore size and particle retention in a filtration system.

1. Nominal filtration

Nominal filtration refers to the ability of a filter to remove a certain percentage of particles of a certain size. This is usually expressed as an average pore size, which means that half of the pores are larger and the other half are smaller. Nominal may not provide the best idea of the maximum number of particles that will penetrate, but it is the most reliable and repeatable statistic with the most predictive value for any given sample of that mesh. (For example, 90% of 10 micron particles are removed).

Key Features:

Not an exact measurement; instead, it indicates approximate performance.

The filter may allow some particles larger than the specified size to pass through.

Usually used in applications where exact filtration is not critical.

Example: A filter rated at 10 microns may remove about 90% of particles of 10 microns, but there is no guarantee that particles larger than 10 microns will not pass through.

Applications: Commonly seen in low-precision industrial processes, pre-filtration stages, or applications where absolute removal is not required.

2. Absolute Filtration

Absolute filtration guarantees retention of all particles larger than a specified size. It provides a precise and measurable filtration efficiency, usually expressed as 99.9% or 100% removal of particles of a specific size.

Key Features:

Measured and verified using standardized tests; provides consistent and repeatable filtration performance; particles larger than the absolute rating are not expected to pass.

Example: A filter rated at 10 microns is guaranteed to remove 99.9% or more of particles 10 microns and larger.

Applications: Critical processes such as pharmaceutical production, food and beverage filtration, water purification, and semiconductor manufacturing where particle control is critical.

3. Geometric Pore Size

Geometric pore size refers to the physical or measured pore size of the filter media and is based solely on the geometry of the filter (e.g. mesh opening, fiber spacing).

Key Features:

Determined by physical or visual methods, such as microscopy or bubble point testing.

It does not directly reflect the filter's ability to retain particles, but provides a basis for filtration expectations.

Typically associated with a woven mesh or sieve, where the pores are of a fixed, measurable size.

Example: In a mesh filter, the geometric pore size could be 100 microns, meaning the largest physical opening in the mesh is 100 microns.

Applications: Used in coarse filtration, screening, and sieving processes where the pore size is directly related to the particle size to be retained.

Practical Importance

Nominal filters are suitable for non-critical, high-flow applications such as prefiltration.

Absolute filters are essential when precise particle retention is required, such as in sterile or purified environments.

Geometric pore size is primarily associated with mesh-based filters, where the pore size determines the mechanical separation.

Actual filtration conditions include more irregular particle shapes and higher pressures and temperatures than typical porosity testing, so any published absolute filtration accuracy should be used only as a guide, not a guarantee.

The accuracy of wire mesh filtration is only one of many specifications for mesh filters. In actual industrial filtration processes, a more comprehensive approach should be considered.

Features and applications:

Stainless steel filter mesh has high precision, stable filtering performance, high load strength, high temperature resistance, high pressure resistance, corrosion resistance and other properties. It is suitable for aviation, aerospace, military industry, scientific research, petroleum, chemical fiber, metallurgy, medicine, food and other industries.

-Used for filtration of palm oil and other oils

-Used for activated carbon decolorization filtration of sugary liquids, adsorption clarification filtration of foods such as juice and alcoholic beverages

-Used for crystal separation, catalyst filtration separation, decolorization filtration, separation of insoluble sulfur-containing solids and liquids in the chemical industry.

-Used for sintered mesh, plates and industrial filter elements.

-Used for filtration in the production of plastic films and plastic containers;

Dashang Wire Mesh selects raw materials from designated stainless steel factories and performs spectral analysis and other testing methods on each batch of raw materials. Weaving is carried out using a fully controlled loom to ensure the accuracy of the mesh count. At the same time, Dashang Wire Mesh has also introduced various advanced testing instruments, such as tensile testing machines, mesh analyzers, etc., to ensure that the woven mesh meets or even exceeds industry standards. Dashang Wire Mesh has passed ISO9001 international quality management system certification and continues to receive favorable comments from users in the domestic and international filtration and screening markets. If you need stainless steel filter mesh, please contact us as soon as possible! sales@dswirecloth.com