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Phone: +1 949-682-0025
Address: 15375 Barranca Parkway, Suite B-204, Irvine, CA 92618
RFQ Support
Please share product type, size, material, micron rating, quantity, application, and operating conditions.
Understand micron ratings for liquid filter bags, nominal vs practical particle retention, application factors, and what to send for quotation review.
Micron rating is one of the most important specifications for liquid filter bags, but it is also one of the easiest to misunderstand. A micron rating describes the approximate particle size a filter bag is intended to retain under defined or practical conditions. It does not, by itself, guarantee perfect removal of every particle of that size.
This guide explains how to think about micron ratings when preparing an RFQ for liquid filter bags.
A micron is one-millionth of a meter. In filtration, micron rating is used to describe particle size. A lower micron rating generally means finer filtration, while a higher micron rating generally means coarser filtration.
For example, a coarse bag may be used to catch larger debris, while a finer bag may be selected to reduce smaller suspended particles. The correct rating depends on the process goal, not on the smallest number available.
Two bags with the same nominal micron rating can behave differently if they use different materials, fabric structures, seams, or operating conditions. Flow rate, viscosity, particle shape, solids concentration, pressure, and bag loading all affect real-world performance.
Before selecting a micron rating, define the filtration goal:
| Filtration goal | Typical direction |
|---|---|
| Catch large debris | Coarser micron review |
| Remove visible particles | Medium micron review |
| Improve clarity | Finer micron review |
| Protect finer downstream filters | Choose based on downstream equipment tolerance |
| High solids loading | Avoid over-fine selection without checking pressure drop |
Do not choose a very fine bag simply because it sounds safer. Overly fine filtration can reduce flow, increase pressure drop, shorten bag life, and raise operating cost.
Felt bags and mesh bags behave differently. Felt bags are often used for depth-style particle capture. Mesh bags behave more like strainers, where particles larger than the mesh opening are retained at the surface.
Polypropylene, polyester, and nylon mesh each have different selection considerations. Review material compatibility and micron rating together.
Need help reviewing a filtration specification? Send your size, material, micron rating, quantity, liquid/application, operating temperature, flow or pressure if known, and any photos or drawings. Go2Filter can review the details for quotation.
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Related guides: What Are Liquid Filter Bags?, How to Select a Liquid Filter Bag, and Liquid Filter Bag Size #1 vs #2.
No. A smaller micron rating can increase pressure drop and shorten bag life. Choose based on the process goal and operating conditions.
Not necessarily. Many bag ratings are practical or nominal ratings, and performance depends on the material, construction, and process conditions.
Describe the filtration problem, liquid clarity requirement, solids appearance, and current filter performance. Photos and samples can help the supplier recommend a starting point for review.
Send your size, material, micron rating, quantity, application, liquid type, operating temperature, flow rate, housing details, and any photos or drawings for RFQ review.
Please send clear photos of the full filter bag, top or ring/collar, bottom, seam, label or marking, and any used, clogged, damaged or deformed area. If the bag is installed in a housing or dust collector, photos of the installation position can also help us review the replacement direction.
Photos are helpful for structure review, but they do not replace dimensions, drawings, samples, working conditions or confirmed specifications. For faster quotation review, please also send size, material or micron rating if known, quantity and application information.
For liquid filter bags, useful photos include the full bag, ring or collar close-up, label, used or clogged surface, housing basket, sealing area and lid or installation position if available.
Photos can reduce back-and-forth communication and help avoid quoting the wrong replacement structure. Final quotation still depends on confirmed dimensions, working conditions, quantity and product specifications.
Full guide: How to Take Useful Photos for Filter Bag Replacement Quotation
To help us review your liquid filter bag requirement faster, please send the bag size, micron rating, material if known, ring or collar type, quantity, and clear photos of the current bag or housing.
If possible, also include the liquid type, filtration purpose, flow rate, operating temperature, and whether you have drawings, samples, or an old bag for comparison. Photos of the bag opening, ring, seam, label, and housing can reduce back-and-forth communication before quotation.
This information is used for quotation review and specification confirmation. Final selection should be based on confirmed product details and working conditions.