How to choose the laboratory freeze dryer
When choosing a laboratory freeze dryer model, we usually consider focusing on the following parameters:
1. Freeze-drying area of ​​laboratory freeze dryer
According to the needs of their own experiments, the user determines how much lyophilizer is needed. The Tianfeng experimental freeze dryer has 0.12 square meters, 0.18 square meters, 0.27 square meters and 0.3 square meters. It can also be customized according to customer needs.
2. Cold trap temperature of the laboratory freeze dryer
The cold trap is a device for capturing moisture in the freeze-drying process. The Tianfeng experimental freeze dryer has two temperatures of -50 ° C and -80 ° C.
3. The ultimate vacuum of the laboratory freeze dryer
The ultimate vacuum is reflected in the pumping efficiency and leakage of the freeze dryer vacuum pump. The ultimate vacuum of the experimental freeze dryer is usually controlled at 15 Pa or more.
4. Cooling rate of laboratory freeze dryer
The cooling rate represents the cooling capacity of the refrigeration system. Under no-load conditions, the temperature of the cold trap should reach the minimum temperature specified in the indicator within one hour. For example, for an experimental lyophilizer with a cold trap temperature ≤ -50 ° C, the machine should be timed from the time of opening the refrigeration, and the time of the cold trap temperature reaching -50 ° C should be no more than 1 hour.
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