High-Performance Polyester Filter Bags for Industrial Liquid Filtration
For industrial applications requiring reliable solid-liquid separation at higher operating temperatures, Polyester (PE) Filter Bags are a versatile and cost-effective solution. Designed to withstand demanding process conditions while delivering high dirt-holding capacity, these bags are a staple in water treatment, chemical processing, and food and beverage industries.
At Purecowater, we supply top-tier filtration consumables compatible with major housings from manufacturers like Veolia, Fil-trek, and Rosedale. Whether you need standard sizing or custom specifications, our polyester filter bags offer the durability and precision required to keep your systems running efficiently.
Standard Polyester Felt Filter Bag with Ring
What Are Polyester Filter Bags?
Polyester filter bags are constructed from synthetic fibers—typically needle-punched felt or woven mesh—engineered to capture solids from liquid streams. Unlike Polypropylene (PP) bags, Polyester (PE) bags are capable of operating at significantly higher temperatures, making them the preferred choice for hot fluid applications.
These bags are available in two primary media types:
- Needlefelt (Depth Filtration): Created by interlocking fibers to form a three-dimensional matrix. This design traps particles throughout the depth of the media, offering excellent dirt-holding capacity and removal of gelatinous particles.
- Monofilament/Multifilament Mesh (Surface Filtration): Woven fabrics that trap particles on the surface. Mesh bags are washable, reusable, and provide precise pore openings for specific micron ratings.
Key Features & Benefits
| Feature | Benefit |
|---|---|
| Thermal Stability | Operates effectively at temperatures up to 275°F – 300°F (135°C – 150°C), superior to standard polypropylene. |
| Chemical Resistance | Excellent resistance to petroleum-based fluids, solvents, and oxidizing agents. |
| Cost-Effective | Provides an economical solution for disposable filtration without sacrificing performance. |
| Broad Micron Range | Available from 0.5 to 200 microns in felt and up to 1000+ microns in mesh. |
| Construction Options | Available with welded seams (to prevent needle-hole bypass) or standard sewn seams. |
Technical Specifications
Understanding the technical capabilities of Polyester material helps in selecting the right bag for your specific fluid stream.
- Material: 100% Polyester (PE)
- Max Operating Temperature: Approx. 275°F – 300°F (135°C – 150°C)
- pH Range: Generally 3 – 11 (Consult for specific chemical compatibility)
- Standard Finish: Singed (felt) to minimize fiber migration
Standard Bag Sizes
We supply polyester bags in industry-standard sizes to fit most commercial filter housings.
| Size Code | Dimensions (Diameter x Length) | Maximum Flow Rate (GPM)* |
|---|---|---|
| #1 | 7″ x 16″ | ~90 GPM |
| #2 | 7″ x 32″ | ~180 GPM |
| #3 | 4″ x 8″ | ~20 GPM |
| #4 | 4″ x 14″ | ~40 GPM |
*Flow rates are estimates based on water and can vary depending on micron rating, fluid viscosity, and contamination load.
Recommended Applications
Polyester filter bags are ideal for applications where process temperatures exceed the limits of polypropylene or where specific chemical compatibility is required.
- Chemical Processing: Filtration of solvents, resins, and weak acids.
- Paints, Inks & Coatings: Removal of agglomerates and particulates in solvent-based paints.
- Oil & Gas: Filtering produced water, amines, and glycols.
- Food & Beverage: Clarification of edible oils and non-critical process fluids.
- General Water Treatment: Pre-filtration for Reverse Osmosis (RO) membranes and protection of downstream equipment.
Ring and Flange Configurations
To ensure a perfect seal within your housing, our polyester bags are available with a variety of top configurations:
- Steel Ring (Galvanized/Stainless): A sewn-in metal ring fits standard ring housings.
- Plastic Flange (P-Flange/F-Flange): Injection-molded tops with handles for easy removal and bypass-free sealing.
- Drawstring: For gravity feed or non-pressurized applications.
Why Choose Purecowater?
As a distributor and OEM for industry leaders, Purecowater ensures you receive high-quality filtration media that meets your exact specifications. Whether you are filtering aggressive chemicals or high-temperature water, our technical team can assist you in selecting the correct micron rating and material.
Need help selecting the right filter bag for your application?