Filter bags are the core filtration components used in filter housings and play a critical role in liquid filtration systems. Through surface interception, adsorption, and depth filtration, filter bags effectively remove solid particles, impurities, and suspended contaminants from liquids, improving liquid cleanliness and purity while ensuring stable operation of downstream process equipment.
Description
Filmedia ® water filter bags offer economical filtration for a wide array of applications. Highly controlled manufacturing procedures ensure consistent quality and no contamination. The unique bag designs provide added strength and avoid the risk of the bypass. Our filter bags fit all industry-standard bag housings.
Filter Media
There is a wide variety of filter media made from diverse materials, while different filtrates possess distinct physical and chemical properties. During the filtration process, the filter medium must be compatible with the filtrate and chemically inert; furthermore, it must withstand the same fluctuations in pressure and temperature. To ensure consistent and uniform filtration quality, the medium must maintain its structural integrity—meaning the pore size remains unchanged—without softening, rupturing, or leaching any substances.
Comparison of The Fabrics
| Filter Material | Code | Strong Acid Resistance | Weak Acid Resistance | Strong Alkali Resistance | Weak Alkali Resistance | Surface Affinity | Temperature Limit (℃) |
|---|---|---|---|---|---|---|---|
| Polypropylene | PP | 4 | 1 | 1 | 1 | Slightly oleophilic, hydrophobic | 93 |
| Polyester | PE | 3 | 3 | 2 | 5 | Oleophobic and hydrophilic | 150 |
| Nylon | NY | 3 | 5 | 4 | 1 | Slightly oleophilic, hydrophobic | 150 |
| Polytetrafluoroethylene | PTFE | 2 | 1 | 1 | 1 | Oleophobic and hydrophobic | 260 |
Optional Pore Size (Micron rating)
| Grade | Level 1 (μm) | Level 2 (μm) | Level 3 (μm) | Level 4 (μm) | ||||||||||||
| Pore size | 1.5 | 10 | 25 | 50 | 80 | 100 | 125 | 150 | 200 | 250 | 300 | 350 | 400 | 500 | 600 | 800 |
4 Standard Products (We also accept customization of size)
| Model | Filter area (m2/pcs.) | Volume (L) | Diameter | Length | ||
| cm | inch | cm | inch | |||
| Type 1 | 0.19 | 7.9 | 17.8 | 7 | 40.65 | 16 |
| Type 2 | 0.41 | 17.3 | 17.8 | 7 | 81.3 | 32 |
| Type 3 | 0.05 | 1.4 | 10.2 | 4 | 20.9 | 8.25 |
| Type 4 | 0.09 | 2.5 | 10.2 | 4 | 35.5 | 14 |
Applications
Filter bags are widely used in liquid filtration separation processes across numerous industries, including:
• Water and wastewater treatment
• Chemical and fine chemical processing
• Petrochemical and refinery industries
• Pharmaceutical and biotechnology industries
• Food and beverage processing
• Edible oil filtration
• Paints, coatings, and ink production
• Resin and polymer filtration
• Electronic chemicals filtration
• Metalworking fluids filtration
• Electroplating and surface treatment solutions
• Pulp and paper industry
• Textile and dyeing industry
• Metallurgical and mining industry
• Power plant flue gas desulfurization systems
• Juice, wine, and beverage clarification
• Catalyst and precious metal recovery
• Biodiesel and renewable energy production