Taishida Small Freeze Drying MachineIt is an ideal method for material dehydration, which maintains the original active ingredients and nutritional components of the material unchanged. After drying, the product not only retains its color, aroma, taste, and shape, but also retains its original flavor and active ingredients after several years of storage. This technology is widely used in the pharmaceutical industry, biological research, nutritional supplements, specialty foods, and other industries.
Taishida Small Freeze Drying MachinePrecautions for vacuum pumping and pre freezing stages:
Vacuum pumping stage (refrigeration unit and vacuum pump kept on)
1. The pre frozen sample exhibits bubbling under vacuum and needs to be re frozen.
2. After turning on the vacuum pump, pay attention to whether the vacuum degree can reach below 50pa and the rate of vacuum degree decrease.
3. If there is a leakage, it is difficult for the vacuum degree to decrease, and the reason needs to be found: whether the two ends of the vacuum pipeline are tightened, whether the freeze-drying cover is closed, and whether the vent valve is closed.
4. The pump oil inside the vacuum pump needs to be replaced regularly. The oil change should be done after 300 hours of operation of the vacuum pump, and the oil change time can be determined based on the decrease in vacuum degree and the limit value in the future.
5. Release the air before drying, and then turn off the vacuum pump.
6. After the moisture sublimates, it will condense into frost inside the cold chamber. After drying and solidifying, it will wait for the frost to naturally melt before flowing out through water. The well will wipe the inner wall of the cold trap clean to keep it dry and tidy.
Pre freezing stage (only open the refrigeration unit)
1. The thickness of the liquid sample is less than 1cm.
2. The temperature of the cold trap must be lower than the eutectic point temperature of the sample.
3. It is necessary to ensure that all liquid water in the liquid sample freezes into ice crystals (the pre freezing time can be moderately extended to ensure successful pre freezing).