Optimized in three decades of NOLL’s practical experience: processing in an inert protective medium. Under nitrogen or – for special materials and refinement – under argon. We’ve set highest safety standards to prevent the risk of inflammation, explosion and fire. Depending on product and processing technique, the oxygen range in the protective atmosphere is maximally 5% until far below 1%. All NOLL systems – the opposed jet mills of the MultiNo® series, the dynamic classifiers of the SeparaNo® series as well as our impact whirl mill DemiNo® – can be operated under inert atmosphere. In practice, MultiNo® mills and high-speed DemiNo® are most often used. We apply cost-efficient gas circulating techniques, where minimal quantities of fresh nitrogen or argon are continuously fed into the system during processing. Even our smallest systems, the technical laboratory machines, are available as special models with protective gas equipment. Here, in addition to circulating gas, the flow gas method is applied.
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