Screening and sifting technology at POWTECH TECHNOPHARM 2025: more precise, more hygienic, more flexible

Protective screening & hygiene: when purity is a must

Where quality assurance is non-negotiable, manufacturers rely on robust protective and control screening. Spaleck (Hall 12.0, Stand 12-276) will be presenting control screening machines that reliably remove contaminants and foreign matter from the product stream. The machines are designed to meet customer-specific requirements and are aimed explicitly at industries with strict hygiene standards, such as food, chemicals and pharmaceuticals. The promise: consistent product quality with high screening performance and economical operation.

A second answer to the question of purity are closed concepts that minimise dust emissions and can be easily encapsulated. Dinnissen (Hall 9, Stand 9-238) is exhibiting a centrifugal screening machine (see image 1, above) whose rotating drum presses the product against the perforated screen wall – only sufficiently fine particles pass through. The wide range of applications is remarkable: with mesh sizes between 250 and 2000 µm, the machine covers throughputs from a few kilograms per hour to over 39 t/h and can be integrated into existing lines – a plus for retrofits in sensitive environments.

Between the requirements of controlled final inspection and closed screening, RITEC (Hall 9, Stand 9-343) positions itself with its MC Central Sifters as the solution for safety and control screening at high throughput rates. The devices are designed for integration into existing installations, which facilitates retrofitting and reduces downtime. Here, too, a common theme emerges: protective screening becomes "insurance" against foreign objects – with concepts that take cleaning, containment and system integration into account.

If even finer results are required, the U-ROC addresses top cuts down to d98 < 3 µm. Design features such as double fine material discharge (homogeneous air velocity with minimal pressure drop), pneumatic feeding directly into the sifting area and a secondary air inlet for re-sifting coarse material stabilise operation in the ultra-fine range. In addition, the QDK series covers classic air classification for cement and industrial minerals: high efficiency, precise particle size control and thus optimisation of grinding systems – from energy consumption to end product quality. 

Agility & multiple fractionation: one machine, many grain sizes

Product portfolios are changing, batch sizes are fluctuating – classification technology must keep pace. RITEC addresses this need with TN Screen Siefters: vibrating circular sieving machines that can be equipped with up to five decks, producing up to six fractions in a single pass. The 3-dimensional vibration increases throughput, with screen areas ranging from 0.125 to 2.5 m². This shortens distances, saves space – and makes systems more robust against product changes.

Separtech (Hall 9, Stand 9-331) is presenting the Universal Round Screen, a universal, modular circular screening solution. Drive unit with motor and counterweights, stacked frames with screens and cleaning options: the machine can be quickly adjusted to new products – as a vibrating screen, separator or sifter. For companies with frequent recipe changes, this is a real lever for OEE.

The bottom line: flexibility is not just "nice to have", but is becoming a core criterion. Multi-deck circular sieves and modular systems enable multiple cut sizes in a single step – and alleviate bottlenecks between classification and filling.