Bag filters trap solid impurities with filter bags, featuring filtration precision ranging from 1 μm to 200 μm. With simple structure, easy bag replacement and low cost, they are widely applied in water treatment, chemical industry, coatings, food & beverage, oil & fat, electroplating, automobile manufacturing, new energy and other industries.
1. Water Treatment Industry (Largest Consumption Market)
- Industrial circulating water: Cooling water for central air conditioning and cooling towers to intercept sediment, rust and algae, protecting heat exchangers and water pumps.
- Pre-treatment for pure water / ultra-pure water: Pre-filtration for RO reverse osmosis to remove suspended solids and colloids and extend the service life of membrane elements.
- Sewage treatment: Advanced filtration for reclaimed water reuse and biochemical effluent to remove activated sludge flocs and suspended solids; decolorization and impurity removal for wastewater.
- Tap water & landscape water: Circulation filtration for swimming pools and landscape lakes to eliminate sediment, fallen leaves and suspended particles.
2. Chemical Fluid Filtration
- Fine chemicals: Filtration of resin, additives, catalysts, dyes and pigment liquids to remove granular impurities and avoid surface defects on finished products.
- Acid & alkaline solutions: PP/PE acid & alkali resistant filter bags for pickling and alkaline washing liquids to filter metal oxides and crystalline particles.
- Organic solvents: Methanol, ethanol, ester solvents filtration to remove carbon powder and resin residues.
- Lubricating oil & heat transfer oil: Remove carbon deposits and metal wear debris from heat transfer oil systems; purification of industrial hydraulic oil.
3. Coatings, Inks & Adhesives Industry
- Filtration of latex paint, industrial paint, automotive topcoat, printing inks and adhesives
- Eliminate agglomerated pigments, sand grains and resin particles to prevent spray gun clogging and granular blemishes on paint films, improving surface smoothness.
4. Food, Beverage, Grain & Oil Processing
- Edible oil: Refining of peanut oil, rapeseed oil and palm oil to filter oil residues, phospholipids and impurities for oil clarification.
- Beverages: Fruit juice, syrup, beer and wine filtration to remove pulp fibers, yeast and precipitates.
- Condiments: Filtration of soy sauce, vinegar and fermentation broth to eliminate fermentation residues.
- Dairy products: Pre-filtration of fresh milk and syrup to remove suspended solids.
5. Electroplating & Surface Treatment
- Electroplating bath solutions (nickel plating, chromium plating, zinc plating, anodizing): Filter metal powder, anode mud and suspended matter to avoid pinholes and pits on coatings.
- Filtration of pickling passivation liquid and phosphating liquid to remove rust and metal scraps.
- Circulation filtration of electrophoretic paint to protect ultrafiltration membranes and ensure uniform paint films on workpieces.
6. New Energy Industry
- Lithium batteries: Filtration of electrolyte and coating slurry to remove particles, preventing cell short circuits and coating pinholes; circulation filtration of cleaning pure water.
- Photovoltaics: Filtration of silicon wafer cleaning liquid and cutting fluid to intercept silicon powder and diamond abrasives.
7. Automobile Manufacturing
- Automotive coating: Circulation filtration for electrophoresis, intermediate coat and topcoat.
- Regeneration filtration of cutting fluid and grinding fluid to remove metal scraps and grinding wheel powder and extend fluid service life.
- Production filtration of antifreeze and brake fluid.
8. Petroleum, Grease & Lubricant Industry
- Purification of hydraulic oil, gear oil and engine oil to remove metal abrasive particles and oil sludge.
- Pre-filtration for diesel and lubricating oil filling to eliminate pipeline rust and impurities.
9. Papermaking & Textile Industry
- Papermaking white water, coating and starch adhesive filtration to intercept pulp fibers and fillers.
- Filtration of dye liquors and printing pastes to prevent screen clogging and fabric color spots.
10. Other General Scenarios
- Pharmaceutical industry: Filtration of medicinal liquids and purified water with food-grade filter bags.
- Metal processing: Filtration of cleaning machine spray water to prevent nozzle blockage.
- Clarification filtration of adhesives, resins, flavors and fragrances.
Brief Selection Guide
- Coarse impurities such as sediment: 50–200 μm standard PP filter bags
- Coatings, electroplating solutions and electrolytes: 1–25 μm high-precision filter bags
- Strong acid & alkali working conditions: PTFE / PP corrosion-resistant filter bags
- Food & pharmaceutical applications: Food-grade non-woven filter bags