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Help CenterRegarding the Purchase of Laboratory Freeze Dryers
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Regarding the purchase of laboratory freeze dryers, we should consider the following aspects:
I. Plate temperature uniformity and flatness:
The uniformity and flatness of the plate temperature has a great impact on the uniformity of product quality. The better the temperature uniformity and flatness, the better the quality uniformity of the freeze-dried product. There are heater type and intermediate fluid type for laboratory lyophilizer shelf temperature control. The lyophilizer shelf adopting intermediate fluid control plate has good temperature uniformity and flatness. The laboratory lyophilizer shelf is a hollow sandwich. The structure, cooling and heating of the plate are realized through the circulation of the intermediate fluid in the fluid channel inside the plate, so the temperature of the plate is uniform.
2, cooling rate
The cooling rate reflects the cooling capacity of the refrigeration system. Under no-load conditions, the temperature of the cold trap should reach the low temperature specified by the index within 1 hour. For example, for a laboratory lyophilizer with a cold trap temperature ≤ -60 ° C, the machine starts counting from the start of refrigeration, and the time for the cold trap temperature to reach -60 ° C should not be greater than 1 hour.
3.Control system
The types and functions of the control systems of laboratory freeze dryers are different. For laboratory freeze dryers that are used for the freeze drying process of materials and a small amount of trial production, the control system should be able to display the freeze drying process parameters in real time and automatically record them; Define, modify and effectively execute the freeze-drying process; with communication interface, it is easy to collect and save data.
4, lyophilized area
The freeze-drying area of ??the laboratory freeze-dryer should be calculated by the user to determine how much freeze-drying area is needed. For example, for each batch of products that need to be lyophilized with a volume of 1.8 kg (liters), the material is loaded on a material tray, and each tray is 10㎜ thick, and the load area of ??the lyophilized board can be calculated:
A (area, ㎡) = V (volume, m) / H (height, m) = 0.0018m / 0.01m = 0.18㎡
The laboratory lyophilizer with a load area of ??0.18㎡ is needed. If you have the needs of freeze dryers, freeze dryers, etc., you need to know the quotation, Please go to / to find the phone +86-10-58895379 or email: info@bjsyhx.com.cn Contact us, we will contact you in the first time.
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