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Used equipment for sale: 18 Sq Ft Hull Freeze Dryer, S/S, Model 378017

Specifications

SKU: 2581-3
GSKU: 02025002196
Condition:: Used
Location:: Cleveland, OH
Year of construction:: 1999

Description

Used 18 sq ft Hull freeze dryer, model 378017, stainless steel product contact surfaces, nominally 18 sq ft shelf area, with (3) usable 24" wide x 36" deep shelves, chamber rated 30 psi at 300 f, external condenser with approximately 100 liter ice capacity, stoppering, pneumatic cam locking door, Allen Bradley controls (2) Carlyle refrigeration compressors, Leybold TriVac pump and Travaini vacuum pump, CIP capable, 480 volt, serial# 212159, vessel certified by NU Vacuum Systems, serial# 4726, national board# 3, built 1999.

More information about the hull-378017

Freeze dryers, also known as lyophilizers, are machines used to remove moisture from various substances through a process called lyophilization. This process involves freezing the material and then subjecting it to a vacuum, causing the frozen water to sublimate directly from solid to gas without passing through the liquid phase. The result is a dry and stable product that can be stored for extended periods without degradation. The freeze drying process consists of three main stages: freezing, primary drying, and secondary drying. In the freezing stage, the material is cooled to a very low temperature, typically below -40°C (-40°F), to solidify the water content. This prevents the formation of ice crystals, which can damage the structure of the material. After freezing, the primary drying stage begins. The pressure is reduced, and heat is applied to the material, causing the frozen water to sublimate. This process can take several hours to several days, depending on the material and its moisture content. The primary drying stage is crucial for removing the majority of the water from the material. The final stage, secondary drying, involves further reducing the moisture content to achieve the desired level of dryness. This is done by increasing the temperature slightly and continuing to apply a vacuum. The duration of this stage varies depending on the material and desired moisture level. Freeze dryers are commonly used in various industries, including pharmaceuticals, food processing, and preservation of biological samples. They are particularly useful for preserving heat-sensitive substances, as the low temperatures used in the process help maintain the integrity of the material. The resulting freeze-dried products have a longer shelf life, retain their original properties, and can be easily rehydrated when needed.

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