Paint and coating filter bags remove agglomerates, dried resin, pigment debris and other process contaminants from liquid coatings before transfer or application. They are not spray-booth intake or exhaust filters. Selection should be based on the coating, required finish, existing housing and operating conditions—not on a generic micron value alone.
Start with the filtration objective
Identify the defect or contaminant to be controlled and the point in the process where filtration is required. A bag used after mixing may face different loading and viscosity than one installed before filling or application. When possible, provide particle or defect information and the current filter specification.
Confirm the micron rating
State whether the requested rating is nominal or absolute. Two bags with the same stated micron value can perform differently because of media structure, thickness and test method. Finer is not automatically better: an unnecessarily fine bag may increase pressure drop, reduce flow and shorten service life.
Match the media to the coating
Polyester, polypropylene and nylon are common liquid-filter-bag materials, but compatibility depends on the complete formulation, temperature, exposure time and cleaning method. Solvents, additives and pH must be checked against the selected media, thread, seam and sealing components. Do not select material from coating type alone.
Check construction and housing fit
- Bag diameter and length
- Ring or sealing style
- Sewn or welded construction
- Media type and surface finish
- Required support basket and flow direction
A correct micron rating will not compensate for a poor seal or an incorrectly sized bag.
Review flow and operating conditions
Provide normal and maximum flow, operating temperature, clean and change-out differential pressure, viscosity range, batch or continuous operation, and expected contaminant loading. These values determine usable area and whether a staged filtration approach is appropriate.
Information needed for selection or quotation
- Coating type and full chemical or solvent information
- Operating temperature and viscosity
- Target contaminant or finish requirement
- Micron rating and nominal or absolute basis
- Existing bag size, ring style and housing model
- Flow rate, pressure limits and batch size
- Required quantity, photos or current data sheet
Replacement and custom support
FiltEdge can match standard or custom liquid filter bags from an existing specification, sample, label or housing information. Final material and performance recommendations are confirmed against the actual application.
View liquid filter bag options or send the application details for a replacement match or quotation.
