Understanding Mesh Size and Micron Rating of Stainless Steel Filter Screen

When selecting a stainless steel filter screen, one of the most important technical considerations is the relationship between mesh size and micron rating.

Many industrial buyers often confuse these two terms, but they represent different measurement methods.

What Is Mesh Size?

Mesh size refers to the number of openings per linear inch of a filter mesh.

For example:

* 20 mesh means there are approximately 20 openings per inch.
* 100 mesh means there are approximately 100 openings per inch.

Generally, a higher mesh number indicates smaller openings and finer filtration capability.

However, mesh size alone does not completely determine filtration accuracy because wire diameter also affects the final opening size.

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What Is Micron Rating?

Micron rating refers to the size of particles that a filter screen can retain.

One micron equals 0.001 millimeters.

For example:

* A 100-micron stainless steel filter screen is designed to capture particles around 100 microns or larger.
* A finer micron rating provides more precise filtration.

For engineers and purchasing teams, selecting the correct micron rating is critical because an unsuitable filter may reduce efficiency, increase maintenance frequency, or affect final product quality.

Why Industries Choose Stainless Steel Filter Screen

Many industries choose stainless steel filter screens instead of plastic or disposable filtration materials because of their excellent performance under challenging conditions.

Excellent Corrosion Resistance

Stainless steel materials, especially SS304 and SS316 grades, provide strong resistance against corrosion.

This makes stainless steel mesh filters suitable for applications involving:

* Water
* Chemicals
* Oils
* Food ingredients
* Pharmaceutical materials

SS316 stainless steel is especially preferred in environments containing chemicals or salt exposure because of its improved corrosion resistance.