Filter bags are essential consumables for industrial solid-liquid separation. Driven by the powerful centrifugal force field generated during high-speed rotation, the suspension experiences intense centrifugal pressure against the filter medium. The liquid passes through the cloth to become filtrate, while solid particles are efficiently retained on the bag surface, achieving precise and high-efficiency solid-liquid separation.
Description
Filter Media
Filmedia® offers a wide range of high-quality filtration materials tailored to the chemical properties of various industrial fluids. Common filter cloth materials include polypropylene (PP), polyester (PET), nylon, and vinylon (PVA); the choice depends on the properties of the filtration medium, temperature, pH conditions, and particle characteristics.
Comparison of Material Properties
| Properties | Polyester (PET) | Nylon (PA) | Polypropylene (PP) | Vinylon (PVA) |
|---|---|---|---|---|
| Acid Resistance | Strong | Poor | Good | Not Resistant |
| Alkali Resistance | Resistant to weak alkali | Good | Strong | Resistant to strong alkali |
| Electrical Conductivity | Very Poor | Good | Good | General |
| Elongation at Break | 30%–40% | 18%–45% | Higher than polyester | 12%–25% |
| Elastic Recovery | Excellent | Good | Slightly better than polyester | Poor |
| Abrasion Resistance | Excellent | Excellent | Good | Good |
| Heat Resistance | 170°C | Shrinkage at 170°C | Shrinkage at 90°C | Shrinkage at 100°C |
| Softening Point | 230°C–240°C | 180°C | 140°C–150°C | 200°C |
| Melting Point | 255°C–265°C | 210°C–215°C | 165°C–170°C | 220°C |
Centrifuge Equipment Compatibility
Our filter bags can be custom-engineered with high precision to fit all major domestic and international centrifuge designs:
- Flat-Plate Centrifuges
- Top-Discharge / Lifting Bag Centrifuges
- Inverting Filter / Pull-Bag Centrifuges
- Peeler Centrifuges
- Three-Foot Centrifuges
Industrial Applications
As critical process consumables, our centrifuge bags are widely deployed across the following high-standard sectors:
- Peptide Synthesis & Production: Clarification of cleavage cocktails, solid-liquid separation post-precipitation, catalyst removal, and removal of insoluble impurities during intermediate processing steps.
- API (Active Pharmaceutical Ingredients) Purification: Solid-liquid separation of drug intermediates to ensure strict hygienic compliance.
- Biologicals: Separation of blood plasma and serum, pre-treatment filtration for Large Volume Parenterals (LVP) and Small Volume Parenterals (SVP), sterile water preparation, and sterile fermentation gas/off-gas filtration.
- Chemical Intermediates: Separation and recovery of hydrogen peroxide, resins, lubricants, polymers, viscose, aviation kerosene, various oils, catalysts, and corrosive acid/alkali solutions.
- Oil & Gas Refining: CNG filtration at fueling stations, amine desulfurization and dehydration agent filtration, refinery separation and purification, oilfield water injection, well workover, and acidification fluid filtration.
- Coatings, Paints & Inks: Filtration of latex paints, raw paint materials, solvents, printing/digital inks, and functional additives.
- Wines & Beverages: Clarification, polishing, and sterile filtration of wine, beer, yellow rice wine, liquor, fruit juices, tea drinks, and soy milk.
- Food Additives & Ingredients: Process purification and aseptic treatment for dairy products, bottled water, edible oils, vinegar, monosodium glutamate (MSG), and other food additives.
- Automotive Industry: Purification of electrophoretic paints (e-coat), topcoats, ultrafiltration (UF) water, pre-treatment fluids, vehicle shower-test water, and engine crankshaft cutting coolants.
- Electronics & Electroplating: Purification of process chemicals and electroplating baths used in the manufacture of Liquid Crystal Displays (LCD), photolithography tracks, optical discs, copper foils, and integrated circuits (IC).
- Wastewater Treatment: Interception of suspended solids (SS) and sludge dewatering in municipal and industrial wastewater treatment plants.
- Metallurgy & Mineral Processing: Continuous production filtration for alumina and phosphate fertilizer industries; slurry thickening and tailings dry stacking management in ore and coal washing plants.