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Detection principles, advantages, disadvantages, and detection standards of four common helium mass spectrometry leak detection methods

Detection principles, advantages, disadvantages, and detection standards of four common helium mass spectrometry leak detection methods

When leak detection is performed using the vacuum method, an auxiliary vacuum pump or leak detector is used to evacuate the internal sealed chamber of the product under test. Helium gas is applied to the outer surface of the product using a helium hood or spraying method. When there is a leak hole on the surface of the product under test, the helium gas will pass through the leak hole and Enter the inside of the product under test, and then Enter the helium mass spectrometer leak detector, so as to measure the leakage amount of the product under test. According to the different methods of applying leaked gas, the vacuum method can also be divided into vacuum spraying method and vacuum helium hood method. The vacuum spraying method uses a spray gun to spray helium gas onto the outer surface of the product under test, which can accurately locate the leak hole; the vacuum helium hood method uses a helium hood with a certain sealing function to cover the entire product under test, and fills the hood with a certain concentration of helium gas, which can measure the total leakage rate of the product under test.

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Gas purification classification and production process

Gas purification classification and production process

The main production processes of specialty gases include gas synthesis, gas purification, gas mixing, cylinder treatment, gas filling, and gas analysis and testing. Gas synthesis is the process of obtaining crude gas products through chemical reactions under specific conditions of pressure, temperature, and catalysts. Gas purification is the process of refining crude products into higher-purity products through methods such as distillation and adsorption.

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Application scope of gas purification equipment

Application scope of gas purification equipment

Helium is primarily used in medical, military, refrigeration, semiconductor, pipeline leak detection, high-precision welding, metal manufacturing, deep-sea diving, optoelectronic product production, balloon carrying, scientific research, and military fields. The following section analyzes helium resource users in conjunction with the main applications of helium resources.

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