Rotary Vacuum Dryers

Rotary Vacuum Dryers (RVDs) are specialized, high-efficiency processing systems engineered for the gentle, uniform, and low-temperature drying of heat-sensitive powders, granules, pastes, and wet cakes.

At the core of their design is a rotating double-cone or cylindrical shell equipped with a heating jacket. This jacket accommodates hot water, steam, or thermic fluid to supply consistent thermal energy. As the vessel continuously tumbles, the material is thoroughly agitated, preventing localized overheating and ensuring uniform heat transfer across the entire batch.

Operating under a high-vacuum environment significantly lowers the boiling points of moisture and volatile solvents, allowing for rapid drying at reduced temperatures. This protects the physical and chemical integrity of thermolabile products—making RVDs indispensable in the pharmaceutical, fine chemical, and food processing industries. Furthermore, the hermetically sealed system facilitates efficient, closed-loop solvent recovery, ensuring both environmental safety and cost-effectiveness.