Fluid Bed Dryer

Fluid Bed Dryer Filter Bags

Replacement fluid bed dryer (FBD) filter bags for pharmaceutical, chemical and food processing, built to fit Glatt, Niro-Aeromatic, Fluid-Air, Vector, Fitzpatrick and every other OEM dryer.

Fits All OEMs

Glatt, Niro-Aeromatic, Vector and more.

Conductive or Not

Anti-static and standard media.

Inspected and Tagged

Traceability on every pharma bag.

Built to Your Drawing

Any style, shape or size.

Fluid Bed Filters

FBD Filter Bags Made to Fit Your Dryer

AFF manufactures fluid bed dryer bags for the chemical, pharmaceutical and food processing industries, with conductive and non-conductive materials to fit any application.

Pharmaceutical

Lint free, inspected and tagged.

Antistatic

Stainless scrim and ground wire.

OEM Replacement

Glatt, Vector, Fluid-Air and more.

Materials

Satin and felt filter media.

How It Works

How Fluid Bed Dryer Filter Bags Work

In a fluid bed dryer or granulator, hot air flows up through the product bowl and lifts the powder or granules into a fluidized bed for drying powders, granulation, agglomerating or spray coating. The air carries moisture and fine particles up into the drying chamber, where the FBD filter bag lets the air exhaust and retains fine powder particles so they fall back into the batch.

That makes the filter bag critical to yield, drying efficiency, product purity and product quality. A bag that fits poorly or loses efficiency lets product escape, while a blinded bag restricts airflow and slows the drying process. Good particle retention also protects against product contamination. The right filter media, a precise fit to the filter housing and clean construction keep every batch on spec.

Warning Signs

Signs Your Fluid Bed Dryer Bag Needs Replacing

  • Product fines showing up in the exhaust

  • Longer drying times or rising pressure drop

  • Torn fingers, holes or worn seams

  • Static buildup on the bag or the product

  • A bag that no longer seals in the filter housing

Compare filter fabrics in our filter media guide →

Materials

Fluid Bed Dryer Filter Media

We carry a wide variety of conductive and non-conductive materials to fit any application, and pharmaceutical bags use lint free materials. Air permeability values come from our filter media chart. Polyester is typically rated to about 275°F continuous; tell us your inlet air temperature, product and particle size and we will recommend the right media.

Material Construction Air Permeability Versions
Polyester Satin Woven polyester with a smooth face for product release 20-25 CFM Standard or anti-static
Polyester Needle Felt Nonwoven felt for depth filtration of fine particles 18-35 CFM (16 oz) Standard or anti-static
Nylon Satin Smooth woven nylon 20-25 CFM Standard
Polypropylene Felt Nonwoven felt with good chemical resistance 18-40 CFM Standard
Antistatic Scrim Stainless steel scrim in a checkerboard pattern Varies by base fabric Felt and satin
Ground Wire Seam Ground wire sewn into the seam to dissipate static – Anti-static bags
Pharmaceutical

Pharmaceutical Fluid Bed Dryer Bags

AFF manufactures a wide range of fluid bed dryer bags for the pharmaceutical industry using conductive and non-conductive lint free materials. Each filter bag is inspected and tagged prior to shipping to avoid cross contamination and provide traceability.

We can manufacture any style or shape, from single bags to multi-finger FBD finger bags, and provide significant savings over OEM bags. Learn more about pharmaceutical and nutraceutical filtration.

Fluid bed dryer filter bag being sealed and tagged after inspection for pharmaceutical use

Lint free materials

Inspected and tagged

Traceability

Any style or shape

Anti-static polyester filter felt with stainless steel checkerboard scrim and grounded seam
Antistatic

Antistatic Fluid Bed Dryer Filters

AFF stocks anti-static versions of our nonwoven polyester felts and woven polyester satin material used in fluid bed dryer filters. Both materials feature a stainless steel scrim in a checkerboard pattern, which, along with a ground wire in the seam, dissipates static through the entire filter.

These antistatic materials add to the wide range of filter media AFF keeps on hand to address your specific dust type and give you the best possible filtration.

Stainless steel scrim

Checkerboard pattern

Ground wire in seam

Felt or satin

OEM Replacement

Replacement Bags for Every Fluid Bed Dryer

We manufacture bags to fit all OEMs, including Glatt, Niro-Aeromatic, Fluid-Air, Vector and Fitzpatrick fluid bed dryers and granulators. Send us a drawing, sketch or CAD file of your current bag and we will manufacture a proper fitting replacement.

Every fluid bed dryer filter bag is built to your dimensions, cuff style, closure and stitched seam construction so the FBD bag seals in your filter housing the same way the original did. Need something unique? See our custom production capabilities.

White polyester satin multi-finger fluid bed dryer filter bag with drawstring cuff

Glatt

Niro-Aeromatic

Fluid-Air and Vector

Fitzpatrick

Industries

Fluid Bed Dryer Bags by Industry

We make fluid bed dryer filters for pharmaceutical, nutraceutical, chemical and food processing plants.

Powder Coating

Metal Working

Pharmaceutical

Food Processing

Woodworking

Manufacturing

Milling

Oil Field

FAQs

Fluid Bed Dryer Bag Questions

Send us your dryer model or a drawing of your current bag and we will match it.

A fluid bed dryer bag is the fabric filter that sits in the expansion chamber above the product bowl of a fluid bed dryer or granulator. Heated air lifts and dries the product, and the filter bag lets that air out while keeping the product fines inside the dryer.

We manufacture fluid bed dryer bags to fit all OEMs, including Glatt, Niro-Aeromatic, Fluid-Air, Vector and Fitzpatrick. If you have another make, send us a drawing, sketch or CAD file of your current bag and we will build a proper fitting replacement.

We carry a wide variety of conductive and non-conductive materials, including woven polyester satin and nonwoven polyester needle felt. Both are also available in antistatic versions, and pharmaceutical bags are made from lint free materials.

It depends on your product. Filtration efficiency comes from the filter media, its weight and finish, so we select the fabric by air permeability and particle retention rather than a single micron number. Tell us your product and particle size and we will recommend the right media.

Our antistatic polyester felt and polyester satin have a stainless steel scrim woven in a checkerboard pattern. Together with a ground wire sewn into the seam, the scrim dissipates static through the entire filter so charge does not build up on the bag.

Yes. Every pharmaceutical bag is inspected and tagged before it ships to help avoid cross contamination and to provide traceability.

Send a drawing, sketch or CAD file of your current bag, or the bag itself, along with your dryer make and model. We will match the style, shape and material and quote a proper fitting replacement.

Our replacement bags are built to fit OEM dryers and typically provide significant savings over buying OEM bags, without giving up fit or performance.

Related Products

More Filtration From AFF

Fluid bed dryer bags are made to order. Explore the filter media, custom production and filter bags behind them.

Filter Media

Felts, satins and fabrics we sew into filters.

Custom Production

Filters built to your drawing or sample.

Filter Bags

Replacement and custom dust collector bags.

Shop All Products

Browse everything in our online store.

Need a Fluid Bed Dryer Bag?

Send us your dryer make and model or a drawing, sketch or CAD file of your current bag, and we will quote a proper fitting replacement.