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 products 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)