Standard Felt
Standard felt bags filters are designed for reliable depth filtration across a wide range of industrial applications. Made from durable synthetic fibers like Polyester and Polypropylene, they offer high dirt-holding capacity, low pressure drop, and excellent chemical compatibility. These filters efficiently capture both solid and gelatinous particles, ensuring consistent performance and cost-effective operation in demanding environments.
 |
Polyester Felt
The Polyester Felt Bag Filter is constructed using 100% synthetic Polyester Fibers. The proper combination of fiber diameters, weights, and thicknesses result in an economical depth filter media.
|
| |
|
 |
Polypropylene Felt Bags
The Polypropylene Felt Bag Filter is constructed using 100% synthetic Polypropylene Fibers. The proper combination of fiber diameters, weights, and thicknesses result in an economical depth filter media.
|
| |
|
Frequently Asked Questions
1. What is a Felt Bag Filter?
+
A felt bag filter is a type of depth-style filter made from synthetic fibers that are thermally bonded together to form a thick, porous media. Unlike surface filters that trap particles only on the outer layer, felt bags capture contaminants throughout the entire depth of the material. This allows them to hold a high amount of particulate and makes them a cost-effective solution for many liquid filtration applications across a wide range of industries.
2. What is the difference between Polyester and Polypropylene Felt Bag Filters?
+
Polyester felt bag filters are well-suited for higher-temperature applications and offer strong chemical resistance to many organic solvents. Polypropylene felt bag filters provide excellent compatibility with acids and alkalis and are widely used across general industrial applications especially in the Food & Beverage industry, where their chemical resistance and broad material compatibility make them a preferred choice.
If you’re unsure which material is the best fit for your application, our Application Engineers are here to help. Just reach out and we’ll guide you to the right solution.
3. Which applications are best suited for Felt Bag Filters?
+
Felt bag filters are widely used across many liquid filtration applications, including water treatment, chemical processing, food & beverage production, paints and coatings, and metalworking. Their depth-loading construction allows them to effectively capture solid particulates from liquids, making them a versatile and reliable choice for a broad range of industrial processes.
4. What micron ratings are available for felt bag filters?
+
Our felt bag filters are available in a wide range of micron ratings, from 0.5 microns up to 200 microns, allowing you to target everything from very fine particulate to larger solids depending on your application needs.
5. Are your felt bag filters compatible with standard filter housings?
+
Yes. Our polyester and polypropylene felt bag filters are designed to fit all standard trade-size bag filter vessels. We also offer custom configurations for applications that require non-standard dimensions or unique specifications.
6. What is the maximum operating temperature for your felt bag filters?
+
Our polyester felt bag filters can handle operating temperatures up to 275°F (135°C), while our polypropylene felt bag filters are suitable for operating temperatures up to 180°F (82°C). For high-temperature or highly corrosive applications, Teflon (PTFE) bag filters are available and can withstand operating temperatures up to 450°F (232°C) with exceptional chemical resistance.
These temperature ratings represent maximum operating limits in water-based applications. Actual allowable temperatures may be reduced depending on pH, chemical compatibility, and other process conditions.
7. Can felt bag filters be reused or cleaned?
+
Felt bag filters are designed for single-use to ensure consistent performance and proper contamination control. When felt bags are washed or reused, the internal fiber structure begins to break down, which degrades the media quality and alters the original micron rating. This can lead to reduced filtration efficiency, bypass, and inconsistent results.
For best performance and process reliability, felt bag filters should be replaced at consistent intervals rather than cleaned and reused.
