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What is the working principle of an airtightness testing machine?

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What is the working principle of an airtightness testing machine?

The airtightness testing machine is mainly used for testing the performance of the fit between the pipes when the plastic pipes of PVC, PE, and PP are flexibly connected by the elastic sealing ring, i.e., the testing of the interface sealing problem. So what is the principle of an airtightness testing machine? Many users are still not clear about the specific principles of the airtightness testing process, so here is a brief explanation of how airtightness testing works and the application areas.


Here is the content list:

l Working principle

l Application areas


Working principle

Make a relatively sealed cavity, put the product to be tested for a leakage into it, then after the airtightness testing machine will control the precise pressure of compressed air into the cavity, and then automatically disconnect the inflatable air source, the solenoid valve accurately control the airflow balance for a specified time, and then shut down the solenoid valve that plays a balancing role (in the balance valve is connected to the test piece at one end, the other end is connected to the standard piece that does not leak). The airtightness testing machine measures the differential pressure between the standard and the test piece within the specified time through a precision micro differential pressure sensor connected to the same air path of the test piece and the standard. Then, the pressure drop generated by the actual leakage of the test piece is obtained through temperature compensation, to determine whether the test piece is leaking. This is the differential pressure test method of the airtightness testing machine.

The airtightness of the device (also known as sealing performance) is one of the important factors in the quality of the device. The method of checking the gas tightness of the device is: gas tightness testing machine to test the leakage value of the device into the relatively sealed cavity, then turn on the gas source, after the leak detection machine is also known as gas tightness testing to the cavity into a certain pressure value of the gas. After the gas source is turned off, the pressure is stabilized for a certain period, and then the watertightness testing equipment starts to test the change of air pressure in the cavity to get the pressure difference, and then the leakage value can be calculated, and the leakiness of the device can be determined according to the leakage value.

Application areas

Vacuum tightness testing is an important process to ensure product quality and production safety, and its role in the production process has been widely recognized, and the application areas are becoming more and more extensive. Tightness tester of elastomeric sealing ring joints from the previous automotive manufacturing industry has developed to the current daily necessities industry, household appliances industry, food packaging industry, medical equipment industry, etc.

Golden Time Technology Development Limited reminds you that understanding the working principle of an airtightness testing machine can facilitate you to understand it more comprehensively.


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