vacuum shelf dryer

vacuum shelf dryer

[′vak·yəm ′shelf‚drī·ər]
(engineering)
A type of indirect batch dryer which generally consists of a vacuum-tight cubical or cylindrical chamber of cast-iron or steel plate, heated supporting shelves inside the chamber, a vacuum source, and a condenser; used extensively for drying pharmaceuticals, temperature-sensitive or easily oxidizable materials, and small batches of high-cost products where any product loss must be avoided.
References in periodicals archive ?
In a vacuum shelf dryer, for instance, the shelves, or platens, are heated electrically or with a hot fluid that circulates inside.
Vacuum shelf dryers and atmospheric pan and tray dryers both process pieces, liquids and purees, and both hold food stationary to do it.