A Vacuum Tray Dryer is an enclosed, insulated chamber designed for drying high-value, heat-sensitive materials under reduced pressure (vacuum). It allows moisture (usually water or solvents) to evaporate at much lower temperatures than at atmospheric pressure, thus preserving the physical and chemical properties of the material being dried.
It works on the principle of conduction heating—heat is transferred to the material via direct contact with heated surfaces while the chamber is maintained under vacuum.
The wet product is spread uniformly on trays.
Trays are placed on shelves inside the chamber.
The chamber is sealed, and vacuum is applied using a vacuum pump.
Heating medium (steam, hot water, or oil) is circulated through shelves.
Moisture evaporates from the product at low temperature due to vacuum.
Vapors pass through the condenser and are collected in a receiver.
After drying, vacuum is released and the dried product is collected.