Custom Liquid Filter Bags for Industrial Applications
FiltEdge helps engineers and buyers select liquid filter bags for the actual process rather than by micron rating alone. We review the liquid and solids, target retention, flow, pressure, operating temperature, chemical compatibility, housing dimensions and change-out requirements.
- PP, PET and nylon media options
- Needle felt for depth filtration and mesh for surface retention
- Standard Size #1 and Size #2, plus custom dimensions
- Plastic, metal and stainless-steel ring options
- Sewn or welded construction according to the application
- OEM labeling, packaging and project support
What is a Liquid Filter Bag?
A liquid filter bag is a replaceable filter element installed inside a compatible bag filter housing. As liquid passes through the media, solid contaminants are retained on the surface or within the depth of the material.
Mesh bags are generally used for surface retention and can suit applications where defined particle capture and cleaning are important. Needle-felt bags provide depth filtration and greater dirt-holding capacity for liquids with broader particle distributions. The correct choice depends on the liquid, contaminant, micron requirement, flow, pressure, temperature and chemical compatibility.
Select the Right Filter Bag by Filtration Type
Liquid filter bags can be divided into standard mesh, standard felt and microfiber types according to the filtration mechanism, which are suitable for surface filtration, deep filtration and high-precision filtration to meet the filtration requirements of different industrial working conditions.
Selection of Liquid Filter Bags by Size
Standard Size #1 (7 × 17 in) and Size #2 (7 × 32 in) bags are available for compatible housings. Custom diameters, lengths and ring configurations can be reviewed for non-standard systems. Confirm the housing basket and sealing interface before ordering.
Size 1 Filter BagsStandard Size #1 (7 × 17 in) bags are designed for compatible Size #1 housings. Confirm the basket dimensions and sealing interface before ordering. Custom diameters, lengths and ring configurations are available for non-standard systems.
#2 Filter BagLarger 7“ × 32” design for higher flow rates and longer service life, most commonly used in industrial filtration.
OEM Liquid Filter BagCan be customized according to your needs, including material, size, filtration precision and structure design, to meet the filtration requirements of different working conditions.
Selection of Liquid Filter Bags by Material
Choose the filter media according to liquid chemistry, temperature, solids loading and cleaning requirements. Options include PP, PET (polyester), nylon monofilament, Nomex and PTFE.
PP filter bags are made of polypropylene with excellent chemical resistance and cost-effective performance for most general industrial liquid filtration scenarios.
PE filter bag is made of high-strength polyester fiber structure, with good temperature resistance and mechanical strength, able to stably intercept particles, suitable for a variety of industrial filtration conditions.
Nylon monofilament filter bags provide defined surface retention and can be cleaned for reuse when the process and contamination level allow. Confirm chemical compatibility, temperature and mesh rating before selection.
PTFE Liquid Filter BagPTFE liquid filter bags are designed for highly corrosive environments with excellent high temperature resistance and high purity filtration capability, suitable for harsh industrial liquid filtration applications.
Selection of Liquid Filter Bags by Filtration Precision
Micron ratings from 1 to 2,000 µm are available across felt, mesh and selected high-efficiency constructions. The suitable range depends on the media, filtration mechanism and whether a nominal or absolute rating is required.
1 Micron Filter Bag1 micron filter bag is designed for ultra-fine filtration, which can efficiently remove very small particles and suspended solids to meet the requirements of high purity liquid filtration.
5 Micron Filter Bag5 micron filter bag is suitable for precision filtration, which can stably intercept fine impurities and improve the purity of liquid and process stability.
10 Micron Filter BagThe 10 micron filter bag realizes a good balance between precision and flow rate, and is widely used in the routine fine filtration of industrial liquids.
25 Micron Filter Bag25 micron filter bag is suitable for medium particle filtration, effectively removes visible impurities and ensures stable operation of back-end equipment.
50 Micron Filter Bag50 micron filter bag is used for coarse filtration stage, which can quickly intercept large particles and extend the service life of subsequent filtration system.
100 Micron Filter Bag100 micron filter bag is suitable for pre-filtration, which can efficiently remove large particles of pollutants, protect the core filtration system and reduce maintenance costs.
Liquid Filter Bags Bag Mouth Type
Different bag opening configurations determine how the liquid filter bags fits into the equipment and can directly affect installation efficiency and sealing stability. Choosing the right type of bag opening can make your filtration system run smoother, reduce the risk of leakage, and lower replacement and maintenance costs. You can choose the most suitable connection method according to the existing filter structure and working condition requirements.
Snap Ring Liquid Filter BagsSnap ring filter bag adopts standard plastic snap ring “V” ring design, quick and easy installation, stable sealing performance, can effectively reduce bypass leakage, suitable for most standard liquid filter systems.
Steel Ring Liquid Filter BagsSteel ring filter bag adopts high-strength metal support ring structure, with excellent structural stability and sealing reliability, suitable for high flow rate and more severe industrial filtration conditions.
Sewn-in Liquid Filter BagsSewn-in filter bags are manufactured by industrial-grade sewing technology, with simple and reliable structure and economical cost, suitable for routine industrial liquid filtration applications.
Flanged Filter BagsFlange port filter bag adopts standard flange sealing structure design, which can realize close fit with equipment, with excellent sealing performance, suitable for demanding industrial filtration system.
Drawstring Liquid Filter BagsDrawstring filter bags adopt flexible tightening design, which can realize quick installation and removal, convenient operation, suitable for filtration systems requiring frequent replacement of filter bags.
Liquid Filter Bags Features
Our liquid filter bags are designed for industrial filtration applications and are widely used in the water treatment, chemical, food and beverage, and pharmaceutical industries with high efficiency and economy.
Available ratings depend on the selected felt, mesh or high-efficiency construction.
Material and construction can be selected to reduce fiber migration for sensitive processes.
Increased filtration efficiency and reduced energy consumption
Operating limits depend on the media, liquid chemistry, pressure and exposure time.
Suitable for spraying, electronics and other demanding industries
Cost-effective removal of non-deformable particles
Supports steel or plastic snap ring construction
Confirm the material declaration and intended conditions of use for each food-contact application.
Core Manufacturing Process of Liquid Filter Bags
Liquid filter bags may be sewn or welded according to the media, seam design and application. Needle-felt constructions provide depth filtration, while monofilament mesh provides surface retention. Ring material, seam construction and reinforcement are selected to match the housing, flow, differential pressure and change-out requirements.
Liquid Filter Bag Quality Standards and Certification System
Confirm the agreed inspection plan and traceability records for the selected liquid filter bag. For food-contact applications, review the relevant material documentation and intended conditions of use before ordering. Product suitability and regulatory acceptance depend on the specific application.
About FiltEdge Liquid Filter Bag Suppliers
FiltEdge LLC is a U.S. company established in 2025, supported by SFFILTECH in China, established in 2006. Manufacturing support is provided through SFFILTECH in China. Confirm product specifications, available quality documents, pricing and delivery in the quotation. Certificates must be checked for the relevant entity, facility and product. Support is arranged during business hours; any on-site service or warranty terms require separate agreement.
Applications for Liquid Filter Bags
Liquid filter bags are suitable for most industrial liquid filtration scenarios, such as coatings, chemical liquids, wastewater treatment, electroplating and cutting fluids. In practice, you can choose different filtration accuracy and material according to the working conditions, to remove particles and impurities, protect the operation of the equipment, and make the liquid more stable. For systems with higher flow rates or impurities, filter bags are usually more durable and easier to maintain.
During paint production and application, you need to control particulate contaminants that can cause uneven application or surface defects. Our Liquid filter bags utilize heat fused welded construction to effectively avoid the risk of contamination from leaking seams while maintaining consistent filtration accuracy. PP/PE filter media maintains good throughput in high viscosity coating environments, helping you to minimize clogging problems and improve consistency in finished coating quality.
In industrial wastewater pretreatment or recycling systems, you often have to deal with high solids content and complex impurities. Our liquid filter bags are constructed with high-strength filter media to maintain consistent filtration efficiency under high flow conditions. The heat-fused sealing design reduces the risk of bypass, helping you to reduce the load on your back-end equipment and improve the operational stability and maintenance cycles of your overall treatment system.
During the electroplating process, the purity of the liquid directly affects the uniformity and adhesion of the plating layer. Our liquid filtration bag adopts silicone oil-free treatment process and precision welded structure to avoid any secondary source of contamination into the system. Stable filtration accuracy can help you effectively remove metal particles and impurities, thus improving the plating surface quality and process consistency and reducing the defective rate.
Liquid Filter Bags vs. Filter Cartridges
Liquid filter bags are suitable for high flow rates and high impurities with lower operating costs, while filter cartridges are suitable for high-precision filtration needs. Depending on the conditions, a more stable and efficient filtration performance can be achieved. In most industrial systems, the two are often used in combination to achieve more stable filtration and more controllable operating costs.
If your system is characterized by high flow rates and high dirt-holding capacity, liquid filter bags are often the more straightforward and economical choice. With their open structure and low flow resistance, they are less likely to clog quickly when handling liquids with high impurity content and are suitable for pre-filtration or large particle interception.
In applications such as coatings, chemical fluids and industrial wastewater, you can reduce overall operating costs by using filter bags, while minimizing replacement frequency and downtime.
When your application requires greater filtration accuracy and stability, standard filter cartridges are more advantageous. Their precision construction allows for effective interception of finer particles and is suitable for end-of-pipe filtration or critical process stages.
In areas such as food and beverage, pharmaceuticals and fine chemicals, cartridges can help you ensure product purity and consistency, but often multiple cartridges need to be connected in parallel to meet system flow requirements.
Liquid Filter Bags Specification
- Liquid Filter Bags Specification
| Item | Specification and selection notes |
| Standard sizes | Size #1 (7 × 17 in) and Size #2 (7 × 32 in); custom dimensions available after housing review. |
| Micron ratings | 1–2,000 µm across felt, mesh and selected high-efficiency constructions; nominal or absolute rating must be confirmed. |
| Media options | PP, PET (polyester), nylon monofilament, Nomex and PTFE. |
| Filtration mechanism | Depth filtration with needle felt; surface retention with monofilament mesh. |
| Ring options | Plastic, carbon steel and stainless-steel rings, plus custom sealing configurations. |
| Construction | Sewn or welded seams; multilayer and reinforced options subject to application review. |
| Selection data required | Liquid and solids, target retention, flow, pressure, temperature, chemical compatibility, housing dimensions and change-out requirements. |
| Typical applications | Coatings, chemicals, water treatment, electroplating, cutting fluids, oil removal and food or beverage processes subject to material documentation. |
Testimonials
We have been using FiltEdge’s liquid filter bags for chemical liquid filtration. The quality of the product is consistent and the heat fusion welded construction has really minimized the leakage problems that were common before. The overall communication and delivery has been smooth and suitable for a long term relationship.
James Carter - USAChemical IndustryThe Liquid Filter Bags have performed consistently in our paint filtration process and we are particularly pleased with the consistency of the filtration accuracy. The durability is also good for use in a continuous production environment, helping to minimize downtime and replacement frequency.
Michael Schneider - GermanyPaints and Industrial CoatingsWe replaced our FiltEdge Liquid Filter Bags in our wastewater treatment system and have seen good results with high solids liquids, longer service life than our previous product, and overall more manageable operating costs.
David Thompson - CanadaWastewater Industry
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Disclaimer
This information is intended for informational purposes only. FILTEDGE reserves the right to update or modify this information without notice.
In actual use, temperature, pressure, flow, differential pressure, chemical compatibility and other operating conditions may have an impact on product performance, the specific performance should be based on the actual application environment.
There is no universal replacement interval. Replace the bag when differential pressure reaches the equipment or process limit, flow falls below the required rate, or downstream quality begins to deteriorate. Service life depends on solids loading, particle size distribution, viscosity, micron rating, bag area and operating conditions. Record the clean starting differential pressure and monitor its trend rather than relying only on elapsed time.
Select the micron rating from the smallest particles that must be retained and the required downstream cleanliness. Also confirm whether the process needs nominal depth filtration or defined surface retention, together with solids loading, flow, viscosity, temperature, pressure and allowable differential pressure. If the particle distribution is uncertain, provide process data or test samples before final selection.
Most PP and PET needle-felt filter bags are treated as replaceable consumables because cleaning may not fully restore their pore structure or performance. Nylon monofilament mesh and some metal-mesh bags can be cleaned and reused when the contaminant, cleaning method and hygiene requirements allow. Reuse should be validated for the actual process.
Yes. FiltEdge can review custom diameters, lengths, micron ratings, media, ring materials, seam construction, reinforcement, labels and packaging. Please provide the liquid and solids, target retention, flow, pressure, temperature, chemical compatibility, housing basket dimensions, sealing interface, quantity and required documents so the configuration can be confirmed before quotation.
