Freeze-drying, also known as lyophilization, is a low temperature dehydration process that involves freezing the material, reducing pressure and adding heat to facilitate sublimation. Freeze-drying works by freezing the material, reducing surrounding pressure and adding heat to allow the frozen water in the material to transition directly from solid to gas without passing through the liquid stage. This avoids damage to heat-sensitive components that can occur during air-drying or spray-drying.

Types of Freeze-Drying Equipment
There are different types of freeze-drying equipment available based on application and drying capacity.

Batch Tray Dryers
Batch tray Freeze-drying Equipment are best suited for low volume production needs. They consist of a drying chamber that can hold multiple stainless steel trays stacked on top of each other. Trays filled with product are loaded into the chamber and the freeze-drying cycle beings with freezing, primary drying under vacuum and secondary drying. Batch tray dryers have drying capacities ranging from 2-50 kg per cycle.

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