chapter  2
66 Pages

THE FREEZE DRYER AND FREEZE DRYER DESIGN

The freeze dryer (Plate 2.1) is the machine that converts the theory of freeze drying into the reality of the production of a freeze-dried prod­ uct. The freeze dryer is an unusual item of equipment; it is not gener­ ally understood, and it is usually the bottleneck in production flow. Whilst there is little of a highly technical nature within the machine, it incorporates many technologies, thus making maintenance, repair, and spares holding as well as procurement, unusually difficult. Nev­ ertheless, most pharmaceutical companies utilise freeze drying as a production technique for at least one of their products.