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Where To Buy A Cheap Laboratory Freeze Dryer?


Experimental freeze dryer supplier are widely used in laboratory scientific research and technical fields such as biopharmaceuticals, chemicals and food. The principle of the instrument is to first freeze the water-containing material into a solid state, and then sublime the water in it from the solid state to the gaseous state, thereby removing the water and preserving the material.

Best Freeze Dryers 2022

Best Freeze Dryers 2022

Advantages of experimental freeze dryer:

1. Freeze-drying is drying at low temperature, which will not denature the protein, but can make microorganisms lose their biological activity. This is especially suitable for dry preservation of biologically active products, biochemical products, genetically engineered products and blood products with poor thermal stability.

2. In the process of low temperature drying, the growth of microorganisms and the action of enzymes can hardly be carried out, so that the original properties of the material can be best maintained.

3. After drying, the volume and shape are basically unchanged, the material is sponge-like, and there is no shrinkage. When rehydrating, the contact surface with water is large, and it can quickly return to the original shape.

4. Because it is generally dried under vacuum, there is very little oxygen, so that the easily oxidized substances are protected.

5. It can remove 95% to 99.5% of the moisture in the material, and the product has a long shelf life.

However, freeze-drying also has its shortcomings and difficulties: the freeze-drying process takes a long time and consumes a lot of energy; the freeze-drying process has a decisive impact on the quality of freeze-dried medicines and foods. The freeze-drying process includes pre-cooling, primary drying, secondary drying and storage stages, etc., which are quite complex heat and mass transfer processes; and these processes are closely related to the thermophysical properties of medicines, foods, excipients, and cryoprotectants .

A small freeze dryer is a technical method that pre-freezes water-containing items, and then sublimates its moisture in a vacuum state to obtain dry items. Freeze-dried articles are easy to store, and can be restored to the state before freeze-drying and maintain the original biochemical properties after adding water. For heat-sensitive substances such as antibiotics, vaccines, blood products, enzyme hormones and other biological products, freeze-drying technology can show its advantages.

Advantages of experimental freeze dryer

The main features of the small freeze dryer:

1. Touch screen LCD display, curve and data display drying process, PID adjustment, convenient for users to know more information about data changes.

2. Cascade refrigeration technology, less freeze-drying time, imported brand guarantee, reduced noise, large cooling capacity, and large water capture capacity. High quality guarantees high performance;

3.304 stainless steel material tray is not easy to deform, easy to operate and easy to clean;

4. The drying room adopts a colorless and transparent plexiglass door with high light transmission, which can clearly observe the changing process of the material during the operation;

5. All 304 stainless steel inside the freezer, anti-corrosion, easy to clean and durable;

6. Equipped with an inflation valve, which can be filled with dry inert gas;

7. In-situ pre-freezing can be selected, which realizes all the automation from vacuum to drying, and reduces the cumbersome operation in the drying process;

8. Optional temperature recorder. Adjustable temperature recording points, real-time monitoring, don't be afraid of forgetting, and increase the protection for your experience accumulation.

9. Optional eutectic point testing device.

Small freeze dryers are widely used in medicine, pharmacy, biological research, chemistry, food and other fields. After freeze drying, the product can be stored for a long time. After adding water, it can be restored to its original state before freeze-drying, maintaining its original biochemical properties. Shengwei series laboratory freeze dryers are complete and complete. It can meet the requirements of various laboratories and various lyophilization methods, and can complete various lyophilization experiments.

The main features of the small freeze dryer

Safety precautions for operating laboratory freeze dryers:

1. Do not use without proper installation

2. Do not use without permission

3. Do not use the shelf if it is not in place

4. Corrosive substances cannot be freeze-dried without special safety measures. Even if there is protection, it is guaranteed that the host material will not corrode and the mechanical strength of the cold trap, door panels and other accessories will not be reduced.

5. Producers are not allowed to add attachments without permission. Do not use if the container is of poor quality, as it is very dangerous to burst the container during freeze-drying.

6. Do not use the laboratory freeze dryer in an area with an explosion hazard.

7. Do not hit or move the freeze dryer during use, and do not lean or rest on it.

8. Do not place potentially dangerous objects, such as bottles filled with liquid, near the laboratory freeze dryer.

9. Samples that react during lyophilization cannot be dried.

10. Do not freeze dry explosive or flammable samples.

11. Infectious, toxic, pathogenic and radioactive substances must be dried in suitable containers.

Freeze dryer vacuum freeze drying process:

Pre-freezing is to solidify the free water in the solution, giving the product the same shape after drying as before drying, preventing irreversible changes such as foaming, concentration, shrinkage and solute movement during evacuation drying.

During the freezing process of the solution, it needs to be supercooled below the bing point. After the crystal nuclei are generated inside, the free water begins to crystallize in the form of pure bing, and at the same time, the heat of crystallization is released to make the temperature rise to the freezing point. The concentration increases, and when the concentration reaches the eutectic concentration and the temperature drops below the eutectic point, the solution is completely frozen.

Before sublimation of freeze-dried products, they must be frozen to a certain temperature. This temperature should be set at 10 to 20 °C below the eutectic point of the product. If the vacuum is directly evacuated without pre-freezing, when the pressure drops to a certain level, the liquid will be evacuated. go. This situation is also called evaporation. This kind of steam is called unsaturated steam. If the product is not frozen and evacuated, the gas in the liquid quickly escapes and the phenomenon of "boiling" occurs. If the product freezes in the "boiling", some parts may escape from the bottle, causing drug loss or uneven surface of the product. It can be seen that the temperature of the eutectic point is a safe temperature to ensure the normal drying of the product, which can only be lower than it and cannot be higher than the eutectic temperature.

where to buy a cheap laboratory freeze dryer?

If you have needs, you can contact Zhengzhou Keda Machinery Equipment Co., Ltd. For decades, Zhengzhou Keda Machinery Equipment Co., Ltd. has been committed to the production and manufacture of laboratory instruments and pipe fittings.

If you want to know about our products, or want to buy our instruments, please feel free to contact us, we will be happy to help you.

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