Type MS
FrymaKoruma Stirrer Bead CoBall®-Mill
High performance annular gap bead mill for sub-micron milling applications
Key Advantages
- Uniform grinding fineness with very dense particle-size distribution
- Optimally adaptable to each particular product
- Excellent reproducibility of the dispersion and grinding results
- Exceptionally large heat exchange surface for optimum cooling
- High hourly throughput combined with very fine grinding, even with highly viscous products
- Optimum machine efficiency
- Small quantity of grinding media
- Product can be changed rapidly with no losses
- Easy to clean and service owing to small grinding gap
- Reduced environmental pollution as less solvents is required for cleaning
- Sterile version available as an option
Material Specifications
- MS 12 up to MS 50: Grinding chamber 1.4034 / AISI 420, 1.4517
- Elastomers : EPDM
Operating Conditions
- Temperature : from 0° - 90°C
- Air humidity : from 0 - 80%
- Ambient air : as dust free as possible
Specification of Standard Components
Mechanical
- Single acting mechanical seal
Electrical & Electronic
- Mill motor and switchgear IP 54
- Other protection types upon request
Options
- Sterile version
- Pharma-finish with machine qualification (FAT)
- Coolable and/or heatable grinding chamber
- Pressure in the grinding chamber up to 5 bar
- Different materials of construction
- other Elastomers
- Frequency converter
- Ex-protection (ATEX, EExe or EExd)
- Double-acting mechanical seal with sealing liquid system
- Supply pump
Functional Description
The milling zone is created in the gap between a conical working vessel – the stator – and a conical rotor. The gap is in
the range 6.5 to 13 mm, depending on the model selected. The movement of the rotor creates radial movement of the grinding
media (metal, glass or ceramic beads). Momentum amplifies the outward motion, so that the product shear force increases
steadily during the milling operation. Milling beads are automatically re-introduced into the product flow as it
enters the milling chamber, so that continuous circulation of the media in the milling chamber is achieved.
The geometry of the grinding chamber ensures uniform particle size and distribution.
Product is fed by an external pump with variable flow rate.
The peripheral speed of the rotor, the width of the milling gap, the material and diameter of grinding media, media fill
volume and flow velocity all affect the milling results. Each of these parameters can be varied at will to create the optimum
conditions for each product.