A Vacuum Freeze Dryer is a device that freezes substances at low temperatures and removes moisture through a sublimation process under vacuum. It is widely used for drying, preserving, and preparing food, pharmaceuticals, and chemical substances.
The operating principle of a vacuum freeze dryer involves freezing the material into a solid state at low temperatures, followed by sublimating the moisture from solid to gas under vacuum through controlled heating and pressure. This method helps preserve the material’s shape, taste, and color while effectively extending its shelf life.
The freeze-drying process is a complex heat and mass transfer operation that involves disciplines such as refrigeration, vacuum technology, electronics, chemistry, and cryomedicine. As China’s pharmaceutical industry continues to develop, manufacturers of vacuum freeze dryers are enhancing technological innovation to achieve greater breakthroughs, making these devices better suited for pharmaceutical drying applications.
The normal operating conditions for a vacuum freeze dryer include:
1.Temperature: The freezing stage should remain below the freezing point, typically between -40°C and -50°C. During the heating phase, the temperature should gradually increase to the drying temperature of the material.
2.Pressure: The vacuum level should be maintained between 5–10 Pa to ensure rapid sublimation and removal of moisture from the material.
3.Cooling Capacity: The system must have sufficient cooling capacity to quickly freeze the material to a low-temperature state.
4.Leakage Rate: The leakage rate should remain within an acceptable range to ensure vacuum stability.
5.Stable Power Supply: A reliable power source is crucial for the equipment’s normal operation.
Note: Specific operating conditions depend on factors such as the model and specifications of the vacuum freeze dryer, as well as the characteristics of the material being processed. It is essential to consult the equipment manual or contact technical support for detailed guidance.
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Post time: Jan-03-2025
