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VirTis & Hull freeze dryers
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Freeze dryers
Brands: VirTis · Hull
Scales: lab to production
How it works
The product is cooled on the shelves until it is completely frozen, below its critical collapse temperature. The ice structure formed here shapes how well it dries.
The chamber is pulled to a deep vacuum and gentle heat is applied. Ice sublimates straight to vapour and is captured on the condenser, removing most of the water.
Shelf temperature is raised to drive off the remaining bound water, leaving a stable, porous cake with low residual moisture that reconstitutes quickly.
Illustrative cycle, not to scale
Product range
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