Filter Bags
Filter bags capture suspended solids from process liquids and dust from baghouse collectors. We make liquid filter bags in felt and mesh from 1 to 200 micron, plus dust filter bags for reverse-pulse collectors. Welded or sewn seams, standard sizes and custom dimensions, from one factory.
Why Filter Bags
Filter bags capture suspended solids from process liquids and dust from baghouse collectors. We make liquid filter bags in felt and mesh from 1 to 200 micron, plus dust filter bags for reverse-pulse collectors. Welded or sewn seams, standard sizes and custom dimensions, from one factory.
- Liquid felt bags: polypropylene, polyester, nylon — 1-200 µm depth filtration
- Mesh bags: nylon and PP mesh for high flow, backflushable in place
- Welded seam option: no stitch holes, higher burst strength for critical duty
- Seal rings: plastic snap ring, metal ring, collar, grommet — sealed against the housing
- Dust bags: 12 oz and 16 oz felt in standard baghouse sizes, anti-static options
- Pleated bag options for higher surface area in existing bag housings
- Custom sizes and fabrics for non-standard housings
- Factory-direct pricing with single-bag samples and per-lot inspection
WHY FILTER BAGS
Why Process Plants Run Bags Instead of Cartridge Trains
At high flow, a bag filter changes out faster and costs less per filtered gallon than a cartridge train. Here is what that buys you.
Lower Cost per Filtered Gallon
A bag is a single media element with no core or cage, so consumable cost sits well below a cartridge train at the same flow. The worked example below shows the difference on a 150 GPM line.
Welded Seams, No Bypass
Stitch holes in sewn bags let a little unfiltered flow through the seam. Welded construction fuses the fabric with no needle holes — stronger seams, cleaner filtrate, and the standard choice for food and pharma lines.
One Factory for Liquid and Dust Bags
The same production line builds felt and mesh bags for process liquids and reverse-pulse dust collectors. Distributors consolidate both programs onto one P.O., one QC standard and one inspection report per lot.
DECISION TABLE
Filter Bag vs Filter Cartridge
Both clean liquids — but they suit different flows, budgets and changeout habits. Compare them before you spec the housing.
| Factor | Filter Bag | Filter Cartridge |
|---|---|---|
| Flow rate | High — fewer elements for the same flow | Lower per element — more elements needed |
| First cost | Low — single fabric element | Higher — media, core and end caps |
| Changeout | Fast — one element per change | Slower — multiple elements per change |
| Micron range | 1-200 µm typical | 0.1-100 µm — finer polishing available |
| Waste volume | Less — one element per change | More — media plus core per change |
| Best for | High flow, coarse duty, pre-filtration | Fine polishing, compact housings, low flow |
COST CALCULATOR
Bag vs Cartridge: Annual Consumable Spend at 150 GPM
Worked example for a 150 GPM water line in moderate dirt service, 24/7 operation. Intervals are typical — real life depends on contaminant load.
| Line item | Bag filtration | Cartridge filtration |
|---|---|---|
| Filter elements in service | 2 bags (size #2) | 16 cartridges (20") |
| Typical unit price | $5.50 | $7.00 |
| Typical changeouts per year | 48 | 12 |
| Annual consumable spend | $528 | $1,344 |
| Annual saving with bags | $816 (61%) — before counting faster changeout labor | |
Typical illustration for moderate dirt service — actual intervals depend on flow, particle load and target micron. We will run the numbers on your operating data before you switch media.
KEY SPECS DEEP DIVE
What Actually Defines a Filter Bag
Media and Fabrics
Polypropylene, polyester and nylon felt for liquid duty, PTFE and specialty fabrics for extreme service. Mesh bags in PP and nylon for high flow. Fabric weight and micron rating are confirmed per lot.
Sealing and Rings
Plastic snap ring, metal ring, collar and grommet options seat the bag against the housing seal plate. Welded or sewn seams match the duty — welded for food, pharma and critical processes.
Micron Rating
Liquid bags from 1 to 200 micron, nominal or absolute per your spec. We test removal efficiency at your rated micron and include the data with the lot.
Sizes
Standard sizes #1, #2, #3 and #4 fit common bag housings; dust bags follow collector diameter and length. Custom dimensions and fabrics are standard production, not special orders.
OEM / ODM FACTORY DIRECT
Your Brand, Our Production Line
Private-label filter bags let distributors build a recurring consumable line without owning a factory. We cut, seam and pack under your part numbering — you sell the relationship.
- • Private-label packaging with your part numbering system
- • Custom fabrics, sizes and rings for non-standard housings
- • Single-bag sample program before volume production
- • Export documentation and consolidated shipping
- • Food-contact documentation for beverage and pharma
WHAT TO SEND US
Flow rate, target micron, housing size or your current bag
We match fabric, seam and ring before you commit to a single piece. A photo of your current bag plus your operating data is enough to quote the replacement.
POPULAR SEARCHES
What Buyers Search in This Category
* Search terms collected from Semrush competitor keyword data — contact us to discuss matching products.
FAQ
Questions Buyers Ask
Felt or mesh bag — which do I need?
Felt is a depth medium: it traps particles through the fabric and holds more dirt, which suits 1-100 µm liquid duty. Mesh is a surface medium: it filters at the weave, flows higher and backflushes clean for reuse. Pick felt for dirt-holding, mesh for flow.
Which bag material handles my liquid?
Polypropylene suits most water and chemical duty up to about 90°C. Polyester handles higher temperatures and some solvents, nylon covers aggressive chemicals, and PTFE or specialty fabrics cover extreme service. Send the fluid and temperature — we confirm the fabric.
Sewn or welded bags — what is the difference?
Sewn bags are stitched through the fabric, so the needle holes allow a small bypass at the seam. Welded bags fuse the fabric with no stitch holes, which raises burst strength and stops bypass — the standard choice for food, pharma and critical processes.
What micron rating should I choose?
Match the rating to the particles you must remove. Fine finishing runs 1-5 µm, general liquid filtration 10-25 µm, and coarse or high-flow service 50-200 µm. Sample testing confirms the rating on your actual feed.
Bag filter or cartridge filter — when do I switch?
Bags win at high flow and coarse duty: lower element cost, faster changeout, less waste. Cartridges win where you need fine polishing below about 1 µm or maximum media area in a small housing. The crossover point depends on your flow and target micron.
Can I test a sample bag in my housing?
Yes, single-bag samples are standard. Run the sample in your housing and compare differential pressure and filtrate quality against your current bag. The sample ships with the same fabric, seam and ring as production.
Do you provide test certificates?
Yes. Every lot ships with a per-lot inspection report covering dimensions, seam and ring integrity, and fabric weight. Burst and seam strength data are available on request for batch verification.
Can you make custom sizes or private-label bags?
Yes. Custom diameters, lengths, rings and fabrics are standard production. Private-label packaging and part numbering are available for distributors — your brand on the bag, our QC behind it.
