Application scope of bag filters-Runlan_Focusing on industrial filtration equipment solutions

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Application scope of bag filters

2026-01-15

The bag-filter principle is a new type of filtration system. Inside the filter machine, a metal mesh basket supports the filter bags. Liquid flows in through the inlet, passes through the filter bags for filtration, and then exits from the outlet. Impurities are trapped within the filter bags, and after replacing the filter bags, the system can continue to be used.
It is becoming increasingly common for bag-filter systems to partially replace cartridge filters—bag filters offer large processing capacities, compact sizes, and high dirt-holding capacities. A No. 2 filter bag has an effective filtration area equivalent to that of 20 10-inch cartridges. From both a cost and efficiency perspective, bag filters outperform cartridge filters.
— Based on the operating principle and structure of bag-filter systems, replacing filter bags is convenient and quick, and the filter itself requires no cleaning, saving labor and time.
—The side-leakage probability of filter bags is low, effectively ensuring filtration quality, whereas the side-leakage probability of filter cartridges is relatively high; with n filter cartridges, the total side-leakage rate can reach as many as 2n!
—Bag filters can withstand higher operating pressures, have low pressure drop, low operating costs, and excellent energy-saving performance.
— The filtration accuracy of filter bags continues to improve and has now reached 0.5 microns, allowing them to replace cartridge filters over a wide range of applications.
— Bag filters have a wide range of applications, are flexible in use, and offer diverse installation options.
—Can be used in conjunction with self-cleaning, membrane filtration, or other filtration systems to meet various needs.

Industry	Scope of application	Efficiency
Petrochemicals	●Filtering lubricating oils, jet fuels, and other petroleum products ● Separating polymers from benzene ●Recycle catalysts and filter catalytic oil slurry ● Filter raw materials after opening the drums ● Security filtration before filling finished products ● Retaining carbon ink and filter aids ● Filter resin, acrylic, and viscose emulsions ● Pre-pump protection	● Lower operating costs and energy consumption ● Reduce corrosion on pipelines ● Removing oil and solid substances from water can reduce costs and increase efficiency. ● Significantly reduce processing fees ● Avoid fluctuations in product quality
Coating	●Electrocoating paint filtration ● Protective filtration for ultrafiltration ●Fat-removal process filtration● Filtration of phosphating liquids ●Electrocoating degreasing ● Filtration and cleaning solution ● Filter metallic paints, clear coats, and the like	●Enhance bonding strength ● Improve surface treatment performance ●Reduce paint shrinkage and rework●Extend the service life of electrophoretic paint ●Prevent nozzle clogging
Resin coating ink	● Filtration of raw materials such as resins ● Removal of fibers and gels from coatings ● Filter the solvent ● Filter particles that fail to meet the required grinding fineness standards ● Remove particulate impurities after mixing and reacting ● Remove agglomerates of adhesive coatings ● Remove oil from the paint	● Filter and recycle solvents ● Enhance resin glossiness ● Increase the operational efficiency of ball milling ● Replace costly chemical treatments ● Lower operating costs and energy consumption ● Enhanced product quality
Food and beverage	●Intercept carbon black and filter aids in sugar production●Polish edible oils ● Security filtration before filling ● Filtration of various process waters, syrups, and other raw materials ● Remove impurities generated during the blending process ● Removes suspended solids and sediments from beverages.	● Enhance the gloss and purity of the finished product. ● Lower investment costs ● Very low operating costs ● Improve product quality
Electronic	● Filter cooling water ● Remove impurities from the copper foil electrolytic stabilization tank ●Pre-filtered purified water ● Filtration of chemical pulp ●Recycling and filtering of chip grinding wastewater ● Filtering PCB ink ●Degreasing in copper foil manufacturing ● Pre-filtration with membrane filter cartridges	● Simple operation ● Increase work efficiency ● Enhance the consistency of product quality. ●Help achieve Six Sigma ● Reduce filtration costs
Pharmaceutical	●Recycle active raw materials and catalysts ● Remove activated carbon ● Filtration of medicinal syrups ● Filtration of plant extracts ●Filtering pH-adjusting solution ● Pre-filtering crystallization solution	● Recycle valuable materials ● Increase drug purity ● Improve product quality
Water Treatment and Membrane Industry	● HVAC system purification ● Remove scale or calcification from water pipes ● Filtration of raw water ● Chemicals for treating wastewater through filtration ●Pre-treatment protection for ultrafiltration membranes and RO membranes ● Filtration of flocculent and colloidal substances ●Pre-filtration of membrane-separated purified liquid ● Interception of ion-exchange resin	● Enhance heat exchange efficiency ● Reduce the用量 of chemicals such as resist agents ● Lower wastewater treatment costs ●Effective membrane protection system● Prolongs the backwash interval of the membrane system ● Extend the service life of the membrane
Metalworking	●Lubricant oil filtration●Coolant circulation filtration ●Recycling precious metals● Filtering workpiece phosphating solutions, cleaning ●Filtering rust-preventive oil ● Ultra-fine grinding oil filtration ● Cutting fluid and cleaning fluid degreasing	●Helps maintain the pH value of lubricating oils ● Extend the service life of oil products ● Improve the precision level of metalworking. ● Protect metalworking tools ● Reduce operating costs and improve processing efficiency ● Improve product pass rate