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GENERAL PURPOSE DRYER
The Cuddon Freeze Dryer was designed after consideration of the factors necessary for
successful pharmaceutical freeze drying. The Model FD5.5 General Purpose Freeze Dryer is
capable of drying a variety of biologicals and pharmaceutical products.
DESCRIPTION
 Turn-Key Service
Unless otherwise specified, Cuddon Freeze Dry sales include CIF freight to your nearest
international seaport, installation/commissioning/staff-training by Cuddon engineers,
and a full 12-month warranty.
Capacity and Cycle Time
Cuddon Freeze Dry’s quality acceptance test is to sublimate and condense the vapour
condenser capacity of ice within 24 hours. For the FD5.5, this equates to 5.5kg of ice.
General
The chamber is mounted within an enclosed steel frame with castors for easy
manoeuvrability. The vacuum pump, refrigeration unit and the pipe work are all mounted
within the enclosed frame. The plant is pre-wired and is comprehensively tested in our
factory before delivery.
Chamber
0.475m diameter x 0.56m long, fabricated from T304 stainless steel.
Heating Plates/Shelves
Plates fabricated from T304 stainless steel, allowing an even internal distribution of the
heating or cooling medium. Shelf spacing can be factory set during manufacture to suit
individual loading. Two sets of T304 stainless steel product trays are supplied as
standard.
Vapour Condenser
Manufactured from T304 stainless steel tube. The assembly is bolted as a permanent
fixture inside the vacuum chamber. Refrigeration of the coil is by direct expansion via a
thermostatic valve.
Defrosting
Defrosting ice from the vapour condenser after a product cycle is by water. Hot water is
recommended to assist in rapid defrosting.
Refrigeration
The FD5.5 has one refrigeration unit which controls the stainless steel vapour condenser
temperature, and the glycol heat exchange temperature. Refrigeration condenser is air
cooled.
Vacuum System
The vacuum pump has a capacity of about 10m³ per hour and is connected to the
chamber. A valve located above the vacuum pump is a two-position valve and either
allows a vacuum break to vent the chamber, isolating the pump, or connection to the
chamber for freeze-drying. The pump features an automatic isolating valve to hold the
chamber pressure in the event of power failure.
Heating System
The heating fluid is glycol based and is pumped by a centrifugal pump through a circuit
which allows heated or cooled fluid to be circulated through the plates on demand of the
electronic temperaturecontroller.
Instrumentation
Edwards 503 vacuum gauge, Shimaden SR93 temperature controller, Omron H7ET run
hour meter, Telemecanique panel switches.
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