Study on Double Vacuum Leak Detection Technology of Lyophilizer Shelf

After the main components of the lyophilization machine are processed, they should be leak-checked separately, obvious leaks and leaks should be removed, and the initial inspection of the components should be completed, but this is often not enough. It also requires careful and careful attention during assembly and assembly. Leak detection, found that the problem was eliminated in a timely manner, leaving no hidden trouble. In the process of assembly and debugging of the whole machine, it is inevitable that some unimaginable problems will be exposed. This article summarizes from practice, the use of double vacuum leak detection method is an effective method, easy to get twice the result with half the effort.

The increase in pressure at this time is:. Hefei, Hefei University of Technology Press, 2002.4045. Jin Sumin, Refrigeration Technology and Its Application. Beijing, Mechanical Industry Press, 1999.5, 260. Zhou Yongan, control method of freeze dryer. Vacuum and low temperature, 1998.9, 179180.

Molybdenum Rod

Molybdenum can increase steel`s corrosion resistance in the acid-based solutions and liquid metals, thus improve its wear resistance, hardenability, weldability, and heat resistance. As an element which easy to form carbides, molybdenum can effectively avoid oxidation during steel making process, and it can be used alone or mix with other alloy element to achieve the best performance.

High temperature smelting additives

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