Botek’s Basket Granulator, also known as a Rotary Basket Extruder or Low-Pressure Extrusion Granulator, is a specialized wet granulation machine used to transform moist powder into uniform, free-flowing cylindrical granules .
Unlike high-shear granulators that rely on intense mechanical force, our Rotary Basket Granulator applies gentle pressure to push the wet mass through a perforated cylindrical screen. This results in soft, porous, and easily dissolvable granules — perfect for products where particle integrity matters.
How Does a Basket Granulator Work?
The granulation process is simple and efficient:
1. Wet Mixing: The powder and binder are first mixed in a high-shear mixer or sigma mixer to form a uniform wet mass.
2. Feeding: The moist material is gravity-fed into the hopper of the Basket Granulator.
3. Extrusion: Inside the machine, rotating blades press the wet mass against a perforated cylindrical screen. The material is forced through the holes, forming continuous cylindrical strands.
4. Cutting: A set of rotary knives cuts the extruded strands into uniform granules of desired length.
5. Discharge: The finished granules fall into the collection tray for drying or further processing .
Key Technical Advantages
- Gentle Extrusion Process: Operates under low pressure to preserve the physical and chemical properties of sensitive materials.
- Adjustable Granule Size: Granule diameter is determined by the screen mesh size — simply replace the screen to meet your target specifications.
- Stainless Steel Construction: Made with high-grade 304 or 316L stainless steel for full compliance with GMP standards and corrosion resistance.
- Easy Cleaning & Maintenance: The open-top design and removable screen allow for quick disassembly and CIP/SIP compatibility (optional).
- Integrated Cutting System: Built-in rotary blades cut the extrd stranudeds into uniform lengths for consistent batch production.
- Durable & Quiet Operation: Precision-balanced components ensure smooth running with minimal vibration and noise.
- Wide Capacity Range: Available in models from 50kg/h to 2000kg/h to suit lab-scale trials or full-scale industrial production.
- Optional Automation: Can be integrated with PLC control systems for automated feeding, speed adjustment, and batch recording.
Applications Industries
- Pharmaceutical Industry: For granulating APIs, excipients, and intermediates before tablet compression or capsule filling.
- Food & Beverage: For instant coffee, milk powder, soup powders, seasoning mixes, and nutritional supplements.
- Chemical Industry: For detergent powders, fertilizer blends, and specialty chemicals.
- Feed & Agriculture: For animal feed additives, pesticides, and crop protection agents.
Data Sheet
| Model | Capacity(kg/h) | Particle diameter(mm) | Blade rotational speed(rpm) | Power(kw) | Weight(kg) | Dimensions(mm) |
| BBG-125 | 50 | 1.2-5 | 65 | 1.5 | 90 | 600*400*700 |
| BBG-250 | 50-300 | 1.2-8 | 65 | 5.5 | 220 | 880*650*1200 |
| BBG-300 | 50-400 | 1.2-8 | 65 | 7.5 | 230 | 880*650*1200 |
| BBG-300 | 50-400 | 1.2-8 | 65 | 11 | 250 | 800*1000*1200 |
Configuration and application of the Double Cone vacuum dryer
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Beyond the VFB Dryer, do you need other equipment?
Double cone vacuum Dryer FAQS
Yes. Simply change the perforated screen with different mesh sizes. We provide a range of screen options to meet your specifications.
Absolutely. The stainless steel body and open-top design allow for quick disassembly. All contact parts are removable and dishwasher-safe.
This machine is ideal for processing wet powders with good plasticity — such as pharmaceutical APIs, excipients, food powders (e.g., starch, protein), chemical binders, and animal feed supplements. It handles both water-based and solvent-based granulation systems. Materials must have sufficient moisture or binder content to form a pliable mass before extrusion.
Screen mesh: Select based on desired granule size and material viscosity. Finer meshes for smaller granules; coarser for larger, more porous particles.
Rotation speed: Typically 20–120 RPM. Slower speeds for delicate materials; higher speeds for denser, harder-to-extrude pastes. Our engineers can recommend optimal settings based on your formulation.
- Daily cleaning: Disassemble the hopper, basket, and discharge chute. Rinse with water or approved cleaning agents.
- Weekly maintenance: Inspect screen for wear, lubricate bearings, check belt tension.
- Annual service: Replace worn blades, inspect motorals, calibrate rotat seion speed. All parts are standardized for quick replacement.
Yes. Our Rotary Basket Granulators are built with GMP-compliant design principles:
Full stainless steel construction (304/316L)
No dead zones for product residue
Easy disassembly without tools
Surface finish Ra ≤ 0.8 μm
Documentation available for validation (IQ/OQ/PQ)
Absolutely. We offer customization based on:
Capacity (kg/h): 50–500 kg/h standard; higher on request
Material compatibility (corrosive, abrasive, high-moisture)
Automation level (manual, semi-automatic, fully automated with PLC)
Integration with upstream mixers or downstream dryers/sifters
Special features: variable frequency drive (VFD), touchscreen HMI, CIP system
Explosion-proof
Yes, we are a full-system solution provider. In addition to high-performance stand-alone machines like our Rotary Basket Granulator, we design and deliver complete, integrated production lines for powder and granule processing.
Key benefits of our integrated lines:
Perfect Compatibility: Equipment is engineered to work together seamlessly.
Single-Source Simplicity: One supplier, one point of contact, full accountability.
Optimized Performance: The entire process is designed for maximum efficiency and product quality.
Contact us for a tailored, end-to-end solution—from a single machine to a complete plant.
