Mesh count and a micron rating describe different things, so do not convert one into an equivalent filtration result without checking the product definition. Ask whether the stated value describes a woven opening, a nominal rating, an absolute rating or another supplier-specific test grade. Confirm the test method, challenge liquid, reported efficiency and exact product model.
Ask what the label refers to
Mesh count is used for woven screens, but a filter bag may be made from fibers, multiple layers or other structures rather than a simple, uniform grid. Even for woven media, the opening depends on the construction and wire or yarn dimensions. A micron value may also be based on different test particles, liquids or retention criteria. A conversion chart can provide an approximate correlation for a defined mesh type; it does not prove that different bag materials retain particles in the same way.
When comparing products, request technical data that explains the rating terminology and conditions. Check whether “micron” means a nominal value, an absolute value or a different test basis, and whether any efficiency percentage is tied to a stated method. A printed number alone is not enough to predict how the bag will perform in a process.
Describe the particle and process target
Tell the supplier where the particles come from, their expected size range, the permitted flow, particle loading and the downstream equipment requirement. If needed, use representative liquid or process data to verify candidate media. Also check bag length, collar, material, seal arrangement and housing fit. A finer medium is not automatically a better choice if the available area or solids load creates excessive resistance or frequent change-outs.
For the difference between nominal and absolute ratings, see our filter-rating selection guide.
Get product-specific test information in writing
Provide the current bag label, target particles and downstream requirement. Ask the supplier to identify the exact product series, media construction, test liquid, efficiency expression, rating definition and batch controls. If a sample test is carried out, record the sample source, flow and measurement method. Two bags with similar labels can still differ in media layers, collar design or housing seal.
| Question | What to request |
|---|---|
| What does “mesh” describe? | Media construction and the stated mesh basis |
| What does the micron value mean? | Nominal, absolute or other defined rating |
| How was it tested? | Test liquid, challenge particles and method |
| What efficiency is reported? | Percentage and the conditions it applies to |
| Which product is covered? | Exact model, media and batch information |
| Will it fit the housing? | Bag dimensions, collar and sealing details |
Filter products and inquiries
Shenzhen Guangxiangyu Technology Co., Ltd. supplies filter bags, bag filter housings and precision filter cartridges. For a rating discussion, share the target particles, liquid, flow and current equipment details with Liu Nan, Sales Manager, at LiuNan2553@gmail.com. Confirm the rating definition and expected result for the exact consumable and operating conditions.
See our filter bags, bag filter housings and contact page.
Technical references
- Filter Products Company: Mesh vs. Micron. Its chart describes a nominal correlation; confirm the mesh construction and product test basis for the bag being considered.
- Eaton multifilament filter bags. Product data identifies mesh media and a retention rating; check the specifications and rating basis for the exact model.