Testing device airtightness method

As the name suggests, airtightness testing is carried out by testing the pressure of various gases through a airtightness testing platform Here we recommend nitrogen detection for everyone Because nitrogen is an inert gas, it generally does not cause harm to the device being tested. There are generally two methods for air tightness testing. Here we will introduce them to you:

1: Bubble detection method.

The bubble detection method designs the size of the water tank and the model of the booster pump based on the required pressure and volume of the device to be detected The device is too large and the sink is too small, which can cause the device to not fit into the water Insufficient pressure can lead to unsatisfactory detection results Bubble detection first fills the sink with water Adjust the pressure connection of the airtightness testing bench to the device being tested The tested device is filled with gas at a pre-set pressure Put it in the sink and see if there are any bubbles coming out No device is considered qualified Bubbling is considered unqualified The next device for pressure relief detection. Advantage: It can directly observe the leakage point Disadvantage: The tested device needs to be placed in water Cannot detect devices that are too large.

Bubble detection test bench

2: Pressure drop detection method.

The pressure drop detection method is mainly aimed at devices that cannot be placed in water Some of the tested devices cannot be placed in water What should I do if bubble detection doesn't work anymore? At this point, it is necessary to detect through pressure drop Firstly, set the online and offline pressure detection times for the airtightness testing platform Connect the tested device and the airtightness testing bench Open the test bench program for testing. 1: Set the online pressure for the tested device to be connected. 2: When the pressure reaches the desired level, automatically maintain the pressure for a certain period of time If the pressure drops to the lower limit at this time, it will be considered as unqualified When the testing time is up and the pressure has not dropped to the offline pressure, it is considered that the product is qualified. Release pressure for the next test.

Related recommendations:

Manual airtightness testing platform

Tightness test with tank body

Parallel airtightness testing machine

Computer airtightness test bench

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