What are the leak detection method for vacuum system _

the purpose of the vacuum leak detection is to use the appropriate method to quickly determine the existence of the leak point, determine the size of the leakage rate to determine whether there is a permissible range, and find out the existence of fault location for processing to check. Eliminating air leaks. Vacuum system of leak detection methods are there? The actual vacuum system is not achieving what is the cause of the vacuum degree? Let me talk about related knowledge of vacuum leak detection. I hope the following content will be helpful to you.

actual vacuum system fails to reach the scheduled vacuum there are three main reasons:

1. Lack of effective pumping speed of water pump;

       2. Have a deflated;

       3. Have a leak.

why vacuum system needs to be leak test?

the purpose of the leak detection is to determine whether there is a leak, determine the position of the leakage, leakage rate measurement and congestion.

vacuum system, container or wall because of material itself or welding equipment, machinery fittings, hole, tear or clearance defect and defective. Outside air through the defect into the system, which leads to the system, the vacuum degree necessary for the container or equipment cannot reach. Degree, this phenomenon is called leakage. Lead to air leakage defect called a flat. Small leak hole size, complicated shape, cannot be expressed in geometry. Therefore, in vacuum, the leakage rate is used to indicate the size of the leak.

vacuum system of leak detection methods are there? The vacuum leak detection method mainly has three kinds:

( 1) Pressure leakage method - — Leakage of the vacuum container filled with certain pressure leakage of material. If there is leakage, leakage of the material will leak out from the leak.

( 2) The vacuum leak detection method - — The vacuum container and leak sensitive components, into vacuum state, then leak material applied to the suspicious part in turn. If there is leakage, leakage of the material will be sensitive components into the container and found.

( 3) Back pressure leak detection method includes three steps: fill, purging and leak detection.

leak detection of the vacuum system leakage material selection should be paid attention to. First, consider the following factors:

1. The active degree of leak detector of active components of leak detection materials;

2。 The content of the leakage in the air;

3。 Material leakage may not cause pollution to leakage of the goods;

4。 There is no leakage of material. Burned, explosive, poisonous, harmful, corrosion and other damage.

can be seen from the above, when choosing leak detection methods, should be based on specific circumstances seek to meet the requirements of leak detection methods. Also suggests that the quality of leak detection and work experience is also an important factor of leak detection methods. Vacuum system, of course, only three kinds of leak detection methods, the static pressure method, bubble leak test, ammonia leakage test and other methods are more, and can also be achieved through different methods to different effect. The specific content of small make up will tell you in next time.

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