Shell Freezer

FreeZone Benchtop Shell Freezers

provide a means to freeze a thin coating of sample on the inside walls of flasks. Since shell frozen samples have a greater surface area than slab frozen samples, freeze drying is enhanced.


For pre-freezing samples. Stainless steel bath has
two rollers that rotate Fast-Freeze Flasks in a low
temperature heat transfer solution, such as methanol
or ethanol, so that a uniform thin coating of sample
freezes to the interior surface of the container. Shell
freezing increases the surface area to volume ratio,
which facilitates efficient vapor flow from sample to
collector during lyophilization.


All models feature:
• Stainless steel and powder-coated steel exterior

• 1/2 hp HCFC/CFC-free refrigeration system to cool the heat transfer solution to -40° C

• Stainless steel bath, 5.5" w x 12.0" d x 6.5" h, surrounded by urethane foam insulation with white high-density polyethylene cover. Two chain-driven rollers, powered by a sparkless induction motor, rotate flasks up to 1200 ml. Approximately two liters of transfer solution are required.

• LED temperature “wave” for display of bath temperature from -20° to -42° C. LEDs illuminate amber as the system cools. When system reaches operating temperature, bottom LED illuminates green

• Retractable drain hose
• Fast-Freeze Flask capacity:
         – Two: 40 ml, 80 ml, 120 ml and 150 ml
         – One: 300 ml, 600 ml, 750 ml, 900 ml and 1200 ml

Freeze dryer flask

Fast-Freeze Flasks. Flasks should be filled to no more
than one-third of their volume. Includes silicone top,
glass bottom and a supply of filter paper. Amber-colored
glass helps to protect light-sensitive samples and is
available in four sizes. Clear available in 10 sizes.
Adapters are required (not included).

Freeze drying flask size:

Clear Flask: 40, 80, 120, 150, 300, 600, 750, 900, 1200 and 2000 mL 

Amber Flask: 300, 600, 750 and 900 mL