Conical screw vacuum dryer

The conical screw vacuum dryer is particularly suitable for the final drying of powders, granules, pastes and viscous slurries especially when they are brittle and/or temperature sensitive. It is often used for active pharmaceutical ingredients, pesticides, sterile APIs, chemically produced toner and cocoa.

Gentle drying of temperature sensitive products

The Vrieco-Nauta® conical screw vacuum dryer from Hosokawa Micron is a universal batch dryer, capable of drying volumes ranging from 5 to 22 000 liters, suitable for powders, granules, pastes, viscous slurries, heavy and sticky products. Specially designed for heat sensitive product or products that contain solvents that are toxic or explosive. It can also be used for vacuum operations such as reaction/crystallization, heating/cooling,
sterilization, liquid/solid separation and de-aeration. Controlling the moisture content by monitoring the weight of condensate or using the Hosokawa sampler for taking samples from the product inside the dryer under vacuum.


  • Efficient drying of loose powders to heavy pastes and viscous liquids.
  • Batch volumes ranging from 5 to 22 000 liters
  • Full compliance with international standards (FDA, cGMP, EHEDG)
  • Automated cleaning solutions with our patented CIP filter and CIP skids
  • Sterile processing (SIP)


Hosokawa Micron is specialised in mixing, drying and agglomeration for the mechanical and thermal processing of dry and wet powders.

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