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Revision as of 03:22, 21 April 2012 by BourassaNowell494 (Talk | contribs) (New page: There are essentially three categories of freeze-dryers: the manifold [http://www.china-drying-equipment.com drying equipment], the rotary freeze-dryer and the tray style freeze-dryer. Two...)

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There are essentially three categories of freeze-dryers: the manifold drying equipment, the rotary freeze-dryer and the tray style freeze-dryer. Two components are common to all types of freeze-dryers: a vacuum pump to reduce the ambient gas pressure in a vessel containing the substance to be dried and a condenser to remove the moisture by condensation on a surface cooled to -40 to -80 C (-40 to -112 F). The manifold, rotary and tray type freeze-dryers differ in the method by which the dried substance is interfaced with a condenser. In manifold freeze-dryers a short usually circular tube is used to connect multiple containers with the dried product to a condenser. The rotary and tray freeze-dryers have a single large reservoir for the dried substance.