Filter Bags

Our Customers' Needs Come First

FSI has complete, in-house control of the production of every filter bag from fiber processing to final product, resulting in highest quality with cost savings passed directly to you. Our felt bags come in a variety of materials and a wide assortment of collar and ring types that ensure compatibility with most bag vessels on the market. And most filter bags come standard with the patented Polyloc® sealing ring that provides a complete hermetic closure and eliminates the possibility of migration.

Multiple filtration uses require multiple filter types. Extended Life designs offer longer life and fewer change-outs with twice the dirt-holding capacity of standard felt bags. Multilayer designs provide high contaminant loading and long service life. The BOS Polymicro® filter bags offer absolute-rated filtration down to three microns, and an entirely seamless design for more precise filtration. The Heavy Duty Extended Life (BOS MAX) filter bag offers greater depth filtration than conventional filter bags.

Innovative Solutions. Clear Results.

Standard Felt Filter Bags

Standard Felt Filter Bags

When it comes to felt filter bags, FSI has the answer. Our years of experience give us an advantage over our competitors, and our felt filter bags show it. Our felt bags are designed to withstand higher solid loading, and are suitable for application... Go

Polyweld®  Filter Bags

Polyweld® Filter Bags

Polyweld® filter bags hold a distinct advantage over all types of needle-sewn bags. The welded seams completely eliminate the possibility of unfiltered liquid bypass occurring due to needle holes. The result is a tighter seam, high bag efficiency an... Go

Extended Life Filter Bags (POEX/PEEX)

Extended Life Filter Bags (POEX/PEEX)

The Extended Life filter bags (POEX and PEEX) provide outstanding performance on many types of contaminants such as gels, particles with wide ranges of sizes, and particles with various irregular shapes. The coarse, pre-filtering layer is designed to... Go

MAX PONG Filter Bags

MAX PONG Filter Bags

The PONG Heavy Duty Extended Life filter bag (MAX PONG) is the leader in high-efficiency, low-cost filtration. Its seamless micro-fiber graded density cartridge insert removes trace oils that frequently occur in process fluids, and provides four time... Go

Filter Bags

Polymicro® Microfiber Filter Bags

The Polymicro microfiber filter bag (POMF) provides outstanding performance on contaminant applications where minimizing particle travel is important. The POMF contains three layers: a pre-filtering layer that removes coarse debris; the primary layer... Go
BOS Filter Bags

BOS Filter Bags

The BOS filter bag is a Polymicro® seamless filter bag, constructed entirely without seams. This unique material composition allows for a higher efficiency, with graded pore-size distribution creating absolute filtration. Thermally bonded microfiber... Go

BOS Gradient Filter

BOS Gradient Filter

BOS Gradient Filter element is the first of its kind, with its patented seamless design and true gradient density. This absolute rated element provides users with the depth of a cartridge and the convenience of a bag. This 100% polypropylene microfib... Go

BOS MAX Filter Bags

BOS MAX Filter Bags

The innovative BOS MAX heavy duty seamless filter bags have an advanced design that provides extended life and increased efficiency with a greater depth filtration than conventional filter bags. It provides all of the benefits of the standard BOS fil... Go

Filter Bags

Mesh Filter Bags

All FSI mesh bags are constructed using a woven or knitted fabric. Whether your particular environment requires a single filament mesh that provides excellent strength with no fiber migration, or a woven multi-strand mesh designed for low-cost, dispo... Go