6 trays, to 96 trays.
- Vacuum tray dryer is the most commonly used batch dryer.
- They are either box-shaped or cylindrical shaped loaded and unloaded via a door.
- Inside this contains several heating plates mounted one above the other on which the product is placed in trays.
- The Top of both heating plates (Shelves) and the bottom of heating shelves trays should be as smooth as possible to permit optimal heat transfer between plates and products.
- The medium flowing through the heating plates is water, steam, or thermal oil.
- The distance between the heating plates is determined primarily by the surface loading and the foaming of the product.
- To avoid retrograde condensation, the cabinet walls are indirectly preheated by limpet coil provided on the outer side of the body (Optional).