Chemical Filter-Dryer
Comber filter-dryers unite solid-liquid separation and vacuum drying in one closed system. This multifunctional concept allows filtration, washing, reslurrying, and drying to be carried out under contained and controlled conditions. For industries where product quality, operator safety, and regulatory compliance are critical, Comber filter-dryers provide a proven and efficient solution.
Chemical Filter-Dryer – Comber powered by De Dietrich
In chemical production, filter-dryers are often used as multipurpose units, where process conditions, product characteristics and operating constraints can change significantly from one campaign to another. The Comber approach focuses on specific engineering choices that support robust operation, controlled drying behaviour and safe handling in multipurpose environments.
The Pressofiltro agitator reflects the pragmatic engineering approach that characterises Comber designs. Its heated hollow shaft and shaped arms ensure steady heat transfer and effective cake management, supporting stable drying performance even with cohesive or variable products.
Original Pressofiltro agitator for filter-dryer
The Pressofiltro agitator reflects the pragmatic engineering approach that characterises Comber designs. Its heated hollow shaft and shaped arms ensure steady heat transfer and effective cake management, supporting stable drying performance even with cohesive or variable products.
Robust Design for Multipurpose Chemical Production
In chemical production, filter-dryers must adapt to a wide range of products and operating conditions. Performance comes from design choices that ensure robustness, flexibility and reliable operation from one campaign to the next.
Reliable operation in demanding environments
Chemical processes often involve aggressive solvents, variable formulations and extended operating hours. Comber chemical filter-dryers rely on solid mechanical design, proven agitation principles and controlled operating parameters to ensure predictable performance and long-term reliability.
Controlled drying and efficient discharge
Consistent drying behaviour is essential in multipurpose plants. The Pressofiltro agitator promotes uniform heat distribution and controlled cake movement, while automated discharge systems help minimise product losses and reduce downtime between campaigns.
Cleanability
Frequent product changes require predictable and efficient cleaning. Smooth internal surfaces, reduced dead zones and accessible seals support effective CIP procedures, with riboflavin testing available when visual confirmation of cleaning coverage is required.
Safety and containment
When containment is needed, the filter-dryer can be integrated with pack-off solutions from the De Dietrich portfolio, ensuring a coherent approach to operator safety and product handling.
Fast and automated discharge under containment
In chemical production, discharge efficiency directly impacts plant availability and batch throughput. The heel break system enables automatic separation of the product cake from the vessel bottom, ensuring rapid and reliable discharge without manual intervention. When combined with the Whirl Snake option, which actively conveys the product toward the discharge valve, the system supports a fully automated emptying sequence under containment. This approach reduces handling time, limits operator exposure, and secures consistent discharge performance even with demanding or variable products.
ATEX-compliant configurations are available for operations involving flammable solvents or vapours, supporting safe and reliable operation in chemical facilities.
Trials & rentals
Chemical applications can vary significantly from one product to another. The De Dietrich Tech Lab offers dedicated trial capabilities to evaluate filtration and drying behaviour with different solvents, crystal structures or operating conditions before industrial scale-up.
Want to know more?
More technical details and alternative designs available within De Dietrich—including pharmaceutical-grade configurations—can be found on the corresponding product page at dedietrich.com.
MORE INFO & DOWNLOAD at DEDIETRICH.COMQuestion or help needed?
For technical questions, project discussions or service-related requests, Comber teams are available to support you at every stage of your project.
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