Felt Filter Bags

A practical and efficient solution for removing suspended solids, sediment, dirt, debris, and other particulate contaminants from water and industrial process liquids. Designed for use in bag filter housings and liquid filtration systems, filter bags provide dependable particle removal while offering a simple, cost-effective alternative to more complex filtration technologies.

Felt filter bags are designed to trap particles both on the surface and throughout the depth of the filtration media. This multi-layered filtration structure provides efficient removal of fine particulate matter while supporting consistent flow and reliable filtration performance.

Key Benefits

  • Efficient Particle Removal – Captures suspended solids, sediment, dirt, rust, and other particulate contaminants from water.

  • Depth Filtration – Traps particles both on the surface and throughout the thickness of the felt media, providing effective filtration and high dirt-holding capacity.

  • High Dirt-Holding Capacity – The dense, three-dimensional fiber structure can retain significant amounts of contaminants before replacement is necessary.

  • Consistent Water Flow – Properly selected felt media supports reliable filtration while maintaining suitable flow rates throughout the filter's service life.

  • Excellent Chemical Compatibility – Specialty felt materials can provide resistance to a wide range of chemicals encountered in industrial water and process applications.

  • Reduced Equipment Wear – Removing sediment and abrasive particles helps protect pumps, valves, membranes, heat exchangers, and other downstream equipment.

  • Easy Installation and Replacement – Designed to fit compatible bag filter housings and allow quick filter changes with minimal maintenance.

Typical Applications

  • Cooling water filtration

  • Chilled water systems

  • Condenser water systems

  • Process water

  • Industrial water treatment

  • Raw water filtration

  • Wastewater treatment

  • Boiler feedwater

  • Lubricating oil

  • Fuel filtration

  • Chemical processing

  • Petrochemical processing

  • Paints and coatings

  • Food and beverage processing

  • Pharmaceutical processing

Construction & Materials

  • Filter Media: Nylon, polyester, polypropylene and specialty options

  • Surface Treatment: Standard or glazed

  • Seams: Sewn or welded

  • Micron Ratings: 1 to 200, depending on configuration

  • Top Styles: Steel/stainless steel/polypropylene rings and plastic flanges

  • Sizes: #1, #2, #3, and #4 configurations

  • Handling: Optional handles or tabs

Performance Specifications

  • Flow Capacity: 5 to 150 GPM per bag, depending on size and micron rating

  • Operating Pressure: Up to 100 psi, depending on bag and housing configuration

  • Temperature Range: Up to 200°F, depending on filter media

  • Pressure Differential: 1 to 30 psi, depending on media loading and application

  • Dirt-Holding Capacity: 1 to 15 lbs. per bag, depending on size, media, and contaminant load

  • Filtration Efficiency: Up to 99% particle removal, depending on micron rating and filtration conditions

Quality & Compliance

All felt filter bags are manufactured using controlled filtration-media and bag-construction processes, with applicable materials selected to meet industry and application-specific requirements, including FDA 21 CFR 177.1520 for applicable food-contact polypropylene materials and NSF/ANSI/CAN 61 and NSF/ANSI/CAN 372 where certified drinking-water configurations are required. Filtration performance and element integrity may be evaluated in accordance with applicable ISO standards, including ISO 16889 and ISO 2942, with material traceability, dimensional inspection, and quality documentation available for applicable configurations.