Vacuum drying
Removing water at low temperatures while preserving the product: the right choice for heat-sensitive raw materials.
What vacuum drying is
It reduces water content by operating at low pressure: as pressure drops, water evaporates at much lower temperatures.
It is the technique of choice for heat-sensitive products, where high temperature would compromise profile, colour or aroma.
How it works
- 01
Depressurisation
Vacuum is created in the chamber: the boiling point of water drops.
- 02
Gentle heating
Electric elements supply energy in a controlled way, without overheating the matrix.
- 03
Concentration
Vapour is drawn off and the product concentrates to the required residual moisture.
Vacuum Dry and spray drying
| Technology | Best suited to | Temperature |
|---|---|---|
| Spray drying | Continuous liquids, large volumes, fine powder | Very brief contact |
| Vacuum Dry | Heat-sensitive and delicate products | Low temperatures |
The choice depends on the matrix, the expected result and the volumes: our R&D identifies the most efficient route.
The advantages of low temperatures
Characteristics preserved
Less thermal degradation of sensitive compounds.
Versatility
Suitable for organic and inorganic raw materials.
Stability
Controlled residual moisture and longer shelf life.
Predictability
A consistent semi-finished product for grinding and granulation.
It integrates with extraction, grinding and granulation for a complete, traced route in San Damiano d'Asti.
Domande frequenti
What is vacuum drying?
It removes water at low temperatures by lowering pressure: the vacuum makes water evaporate without overheating the matrix.
When is it preferable to spray drying?
When the raw material is heat-sensitive, or when colour, aroma and active compounds must be preserved as fully as possible.
Which raw materials can be dried?
Organic and inorganic raw materials, with a clear advantage for extracts and heat-sensitive ingredients.
Is it available as a contract service?
Yes, on a toll processing basis, and it can be combined with the other steps of our internal chain.