Main features of vacuum freeze dryer 1. Adopting single-machine (imported compressor) mixed refrigerant technology, the refrigeration is rapid, the temperature of the cold trap is low, and the ability to adsorb water is strong. 2, cold trap and crop material pre-freezing chamber, no need to configure a low-temperature refrigerator. 3, the LCD screen as a human-machine interface, the curve and digital form real-time display material temperature and cold trap temperature, digital display vacuum; 4, the host is equipped with RS232 communication interface 5. With heating shelf, the shelf heating curve can be preset to realize the automation of the sublimation process. 6. The quick release flange connection between the main machine and the vacuum pump is convenient to use. 7. Adopt anti-return oil vacuum pump. 8, the host can achieve shelf temperature control. 9, stable and reliable performance, easy to operate. 10, with excellent performance and price ratio. Vacuum freeze dryer precautions 1. The sample should be kept frozen and cannot be “refusedâ€. Most solvents have a freezing point above -40 ° C, so a freezer compartment temperature below -40 ° C keeps the average sample ice. To ensure that the sample does not “returnâ€, the frozen sample can be made into small pieces of less than 20 mm. 2. Toxic or corrosive samples. Zui is not used for freeze drying. If it is used, it needs more system maintenance, and it needs to order a special filter to protect the vacuum pump. 3. Vacuum pump oil should be kept clean. The yellowish or colorless oil is clean, the darker color indicates acid contamination, and the hazy turbidity indicates water contamination. Need to change the oil when there is pollution.
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