High-Surface-Area Finger Bags for Fluid Bed Processor Equipment

Skytech Ultrafab FBP Finger Bags are multi-finger antistatic filter elements for Fluid Bed Processor (FBP) granulators and coaters where maximum filtration surface area within the processor bowl is required. The multi-finger configuration significantly increases the filtration area compared to standard single-bag designs, reducing pressure drop, improving fluidisation uniformity, extending bag service life, and allowing longer granulation runs before bag cleaning intervention.

What Is an FBP Finger Bag?

An FBP Finger Bag is a filter element consisting of multiple fabric finger tubes extending from a single mounting collar fitted to the FBP exhaust outlet. Each finger provides independent filtration area; together they present 3–5× the total filtration area of a standard single-bag design within the same processor bowl space. During fluidisation, the fingers expand and contract as air pulses through the processor, which assists in self-cleaning of the filter surface and extends the time between manual bag cleaning interventions.

Features and Benefits

• Multi-Finger High Area: Three to eight fingers per collar provide 3–5× the filtration area of a standard FBP bag — lower face velocity per finger means less pressure drop and longer cleaning intervals between production batches
• Antistatic Needle-Punched Felt: Each finger fabricated from antistatic needle-punched PES or PP felt with conductive fibre — mandatory for pharmaceutical applications involving flammable solvents or static-sensitive APIs
• Self-Cleaning Action: Individual fingers flex independently under the pulsing airstream of FBP operation — mechanical flexing continuously dislodges cake from the finger surface, extending service intervals
• OEM-Compatible Collar: Mounting collar fabricated to the exact exhaust outlet dimensions of GEA, Glatt, Aeromatic, and all major FBP OEM brands — direct replacement for existing bag designs
• cGMP Materials: All-FDA 21 CFR-compliant materials with no adhesives or hidden joints — full surface accessible for cleaning validation and inspection between batches
• Custom Finger Count: Three, four, six, or eight fingers per collar depending on bowl size and required filtration area — Skytech engineers specify the optimal configuration for each FBP model

Technical Specifications

Applications

• Pharmaceutical FBP Granulation: High-area finger bags for granulation of tablet and capsule formulations in FBP machines where reducing pressure drop improves granule quality and batch consistency
• Pellet Coating: Wurster-type pellet coating processors where multi-finger design maintains low pressure drop for uniform air distribution across the Wurster partition
• Potent Compound Processing: API granulation in contained FBP systems where longer bag intervals reduce changeover frequency and minimise operator exposure during bag exchange
• Spray Granulation: Top-spray granulation in FBP equipment where fine droplet spray generates high fines loading on the filter — multi-finger area handles the increased solids load
• Nutraceuticals: Vitamin and supplement granule processing where high throughput and minimal downtime for bag cleaning are key production efficiency targets

Why Choose Skytech Ultrafab for FBP Finger Bags?

• Proven Pressure Drop Reduction: Multi-finger area reduces FBP bowl pressure drop measurably — improving fluidisation quality, granule size uniformity, and batch-to-batch consistency
• Extended Batch Intervals: 3–5× area means 3–5× longer between manual bag cleaning stoppages — directly increasing FBP production uptime and reducing cleaning labour cost
• Full Pharma Documentation: Antistatic test certificates, FDA material declarations, and dimensional inspection reports for pharmaceutical equipment qualification and regulatory submission
• OEM Dimensional Match: Finger bag assemblies fabricated to GEA, Glatt, and all major FBP OEM collar specifications — guaranteed fit without OEM price premium
• Complete FBD/FBP Programme: Order finger bags together with Skytech FBD bags, bonnet bags, and combo bags — one source for all fluid bed equipment filtration consumables across your facility