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Your Location: Home >> News >> Technical support >> Five minutes second to understand the experimental vacuum freeze dryer classification and use precautions

Five minutes second to understand the experimental vacuum freeze dryer classification and use precautions

Release Date: 2018/8/22 16:47:09 .
Browse: 726

Five minutes second to understand the experimental vacuum freeze dryer classification and use precautions
Vacuum freeze dryer is abbreviated as freeze dryer. It can be divided into experimental vacuum freeze dryer, pilot vacuum freeze dryer and production vacuum freeze dryer according to specifications. The experimental vacuum freeze dryer, as its name implies, is a small vacuum freeze dryer equipment used for sample experiments and a small amount of lyophilization.
The experimental vacuum freeze dryer has been developed to date, and its variety has gradually increased. According to its function, it can be divided into: ordinary vacuum freeze dryer, gland type vacuum freeze dryer, multi-manifold ordinary vacuum freeze dryer, multi-manifold gland type vacuum freeze dryer, T-frame vacuum freezing Dryer, in-situ vacuum freeze dryer.
1 ordinary vacuum freeze dryer: suitable for most routine experiments, materials can be bulk-packed in the material tray for freeze-drying;
Compared with the traditional freeze-drying machine with the same freeze-dried area, Beijing Songyuan New Push Experimental Vacuum Freeze Dryer has compact size and reasonable price. Compared with traditional laboratory small freeze dryer, it is easy to operate and freeze-dried in situ. It avoids the pollution of the material drying process and the cumbersome operation of the manual.
When using the experimental vacuum freeze dryer for the first time, all parts of the instrument must be thoroughly cleaned. The stainless steel parts are cleaned with ethanol and the plexiglass is washed with normal saline. The ampoule is cleaned with an ultrasonic cleaner.
Pre-freezing must be carried out before lyophilization. If you want to prepare a low-temperature refrigerator, a temperature of minus 40 degrees Celsius, or a low-temperature refrigerator of minus 80 degrees Celsius, it is usually about four hours to put the items to be dried in a low-temperature refrigerator or liquid nitrogen. It can be observed directly from the outside, after the item is completely frozen in ice, the freeze-drying experiment can be carried out to quickly move the item into the freeze dryer tray to ensure the freeze-drying effect.
The main unit and the vacuum pump are connected by a green vacuum tube, and the joint uses an international standard clamp. In order to effectively prevent air leakage, this type of clamp is specially designed with a sealing rubber ring in the clamp. In the method of preventing air leakage, apply a proper amount of vacuum grease on the rubber ring and then clamp it with a clamp to make the joints fit closer together. If there is no clamping clamp, it will cause air leakage, which will cause the digital display value of the instrument panel to be greater than 20pa when vacuum is drawn. At this time, the airtightness of the vacuum pump and the glass cover of the Experimental Vacuum Freeze Dryershould be checked.
There are two power sockets on the right side of the experimental vacuum freeze dryer main unit. One connects the power line of the vacuum pump to the main unit, and then plugs the main power supply on the second experimental vacuum freeze dryer into the power supply.
Before the vacuum pump is running, it must be checked whether vacuum pump oil is added, otherwise it will not operate normally. The oil level must not be lower than the center line of the oil mirror. The vacuum pump has a strong shaking when it is used at the beginning, and it will gradually become stable.
If the air tightness is not good, apply some vacuum grease to the sealing rubber ring above the cold trap, gently rotate the plexiglass cover on the rubber ring, and test the air tightness by opening the vacuum pump. To ensure the integrity of the gas seal.

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