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Big performance in a small space

Multifunctional mill concept
Big performance in a small space

Big performance in a small space
The Hammerwitt-Lab was specially equipped for use in the isolator
When it comes to optimising its mills, Frewitt puts the emphasis on simpler and more flexible milling processes, multifunctionality and optimal use of space. A multifunctional mill integrated in a Swiss pharmaceutical manufacturer’s isolator is a good example of how this strategy works in practice.

Whereas in the past users generally paid particular attention to a mill’s specific milling characteristics, greater flexibility in the milling process is the number one priority today. The mill which is ultimately selected has to be capable of reducing the most diverse products to particle sizes of less than 30 μm, often in a very confined space. The Fredrive’s monobloc design, standardised drive and control system and modular concept with interchangeable milling heads have established it as the solution of choice ever since evaluations first started. Easy and reliable to operate, highly flexible and with unequalled scale-up enhancement, it is predestined for applications where space is at a premium. Furthermore, this milling system satisfies all relevant safety requirements: FDA and GMP conformity are offered as standard while compliance with the latest Atex regulations is optionally available for all versions.

The well thought-out connection to the pharmaceutical manufacturer’s isolator is an especially impressive feature of this machine: the base module consists of the Fredrive-Lab and a complete control system. The Hammerwitt milling head is attached to this module with a Tri-Clamp flange. A plate mounted between the base module and the milling head acts as the interface to the isolator. Since only the milling head is actually installed inside the isolator – the drive and control system is mounted externally – the total integrated unit is not quite a third of the size of conventional mills.
Since the customer had already acquired an Oscillowitt for milling dry and wet products to a particle size of 250 μm some time ago, there were no additional costs. The Oscillowitt milling head is very easy to exchange for the Hammerwitt head.
Exceptionally versatile
The Fredrive-Lab was developed for analytical laboratories in the pharmaceutical, (fine) chemical, cosmetic and food industries. It is just as well suited for processing laboratory batches as it is for pilot-scale quantities. Reliable and practical scale-ups are guaranteed because the drive and control concept is absolutely identical for both the Fredrive-Lab and the Fredrive. The same also applies to the milling heads: the Hammerwitt-Lab has an identical design to the Hammerwitt, the size and performance being the only aspects of the Hammerwitt to vary. With a product throughput of 50 to 120 kg/h, the Hammerwitt-Lab is ideal for both laboratory applications and small batch production. It is a hammer mill that achieves optimum fine milling and pulverisation results with hard, crystalline and fibrous products. Mounting on just one bearing means product heating during the milling process is reduced to a minimum; cleaning and maintenance are extremely straightforward.
A dosing system integrated in the infeed hopper ensures a continuous product flow and prevents clogs in the milling chamber. Thanks to the top-down approach, the machine can be integrated effortlessly in existing production equipment.
www.cpp-net.com search: cpp0117frewitt

René Herzog
Regional Sales Manager,Frewitt
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