The Fluid Bed Dryer (FBD) is the most widely used dryer in modern pharmaceutical granulation suites. Its ability to dry wet granules rapidly, uniformly, and efficiently makes it the standard companion to the Rapid Mixer Granulator (RMG) in wet granulation lines. As a trusted Fluid Bed Dryer manufacturer, supplier and exporter in India, Bipin Pharma Equipment manufactures GMP-compliant FBDs for pharmaceutical, food processing, chemical, and nutraceutical industries.
What is a Fluid Bed Dryer?
A Fluid Bed Dryer uses the principle of fluidization — heated, filtered air is blown upward through a perforated distribution plate at sufficient velocity to suspend (fluidize) the granule or powder particles. In this suspended state, every particle is surrounded by drying air on all sides, resulting in highly uniform and rapid moisture removal.
Fluid Bed Dryer (FBD)
GMP-compliant, SS 316 construction. Capacities from 30 kg to 300 kg. Bag filter, retarding chamber, finger bag options available.
View Full Specifications →
Rapid Mixer Granulator (RMG)
The standard upstream partner to the FBD. RMG granulates the powder blend; FBD dries the wet granules in 20–60 minutes.
View RMG →Working Principle of Fluid Bed Dryer
- Air Intake & Filtration: Ambient air drawn through pre-filters and HEPA filters
- Air Heating: Filtered air passes through steam/electric heater (typically 50–80°C inlet)
- Product Loading: Wet granules from the RMG charged into the product container (bowl)
- Fluidization: Heated air flows upward through perforated distributor plate, lifting and suspending granules
- Drying: Hot air surrounds every particle, absorbing moisture; moisture-laden air rises into expansion chamber
- Bag Filter: Fine particles captured in bag filters; periodic shaking returns them to the bowl
- Exhaust: Humid air exits via exhaust blower; LOD monitored during cycle
- Discharge: After reaching target LOD, product discharged from lower bowl outlet
Key Features
- cGMP / WHO-GMP Compliant — all product contact parts SS 316, mirror-polished
- Retarding Chamber: Reduces product carry-over into bag filters
- Finger Bag / Shaking Bag: Automatic bag shaking for product recovery and constant airflow
- Inlet Air System: Pre-filter + intermediate filter + HEPA filter (H13/H14 for sterile applications)
- Variable Speed Blower: Precise fluidization velocity control with VFD
- PID Temperature Control: Inlet and outlet temperature display with steam/electric heater
- Safety: Explosion vent, antistatic earthing, flame-proof electrical (for solvent applications)
- CIP: Cleaning-in-place spray ball nozzles for validated cleaning
FBD in the Wet Granulation Line
| Step | Process | Equipment |
|---|---|---|
| 1 | Dry mixing of API + excipients | Rapid Mixer Granulator |
| 2 | Wet massing with binder solution | Rapid Mixer Granulator |
| 3 | Drying of wet granules | Fluid Bed Dryer |
| 4 | Dry milling / sizing | Multi Mill |
| 5 | Sifting / grading | Vibro Sifter |
| 6 | Lubrication blending | Double Cone Blender / Octagonal Blender |
| 7 | Transfer to compression | IPC Bin |
Technical Specifications
| Parameter | Specification |
|---|---|
| Bowl Capacity | 30 / 60 / 120 / 200 / 300 kg (custom available) |
| Material (Contact Parts) | SS 316 / SS 316L |
| Inner Surface Finish | Mirror polished Ra ≤ 0.8 µm |
| Inlet Air Temperature | 40°C – 90°C (adjustable) |
| Blower Type | Centrifugal / Variable speed (VFD) |
| Air Filtration | Pre-filter + Intermediate + HEPA (H13) |
| Filter System | Finger bag / Shaking bag / Anti-static bags |
| Heating System | Steam coil / Electric heater / Thermic fluid |
| Controls | PLC-based / Manual panel |
| Compliance | cGMP / WHO-GMP / CE ready |
For any wet granulation line, the Fluid Bed Dryer is non-negotiable — reducing drying time from 6–12 hours to just 20–60 minutes with superior LOD uniformity. Bipin Pharma Equipment manufactures FBDs matched to your RMG bowl size. Contact us to configure the right FBD for your granulation suite.