Industry science｜Why the positive pressure air tightness tester test result is rarely 0-Jingcheng Technology Co.

Airtightness testing is important in product manufacturing to ensure that products perform as they should and are safe for use. However, people often wonderfor what reason?Positive Pressure Airtightness TesterWhy are the results seldom 0? This question is worth exploring in depth.

Ⅰ.Positive Pressure Airtightness Testerbrief

Positive Pressure Airtightness TesterBy directly filling the product under test with a certain pressure gas.And thenMonitor pressure decay changes to determine sealing performanceand therefore the pressure decay method is also called the pressure drop method.Mainly for any open, inflatable hole products waterproof test. This technology is widely used in the automotive, electronics, and aerospace industries and plays a vital role in ensuring product quality.

II. Why leakage values are rarely 0

Simply put, there are a variety of reasons whyAirtightness TesterIt is not possible to measure absolute 0 leakage for several reasons:

1. Tolerances in product manufacturing

It is impossible for any product to be absolutely sealed. During the manufacturing process, due to factors such as material, process and equipment, the product may have minor defects, such as tiny trachoma, cracks or poor seams, etc., which may lead to gas leakage.

2. Product design factors

There may be design defects in the sealing structure of the product design, such as improper selection of materials for the sealing ring, unevenness of the sealing surface, etc., which may lead to leakage.

3. Impact of the testing environment

Changes in temperature, humidity and air pressure in the testing environment may affect the results of the airtightness test. For example, changes in temperature may lead to expansion or contraction of the product material, thus affecting the sealing performance; in a higher temperature environment, it will lead to expansion of the gas inside the sealing cavity and the leakage value close to zero, and in a low temperature environment, it will lead to cold contraction of the gas inside the sealing cavity and the leakage value is higher than the actual leakage.

4. Impact of testing methods

Different airtightness testing methods have different detection ranges and sensitivities and may measure different leakage values. For example, the leakage value measured by the pressure drop method may be higher than that measured by the flow method.

5. Impact of operators

Operators may introduce errors during airtightness testing due to improper operation or negligence, resulting in test results that deviate from the true value and a high final leakage value.

Therefore, in practical application, theAirtightness TesterThe result of the leakage value will generally not be 0, but will have a certain value. Different products and application scenarios have different requirements for the allowable range of leakage values.
generalAirtightness Tester ManufacturerThe test pressures and leakage criteria are tuned to the product under test.Non-zero results can not simply conclude that the product is not qualified, need to be combined with the specific circumstances, comprehensive analysis of pressure trends, leakage and other indicators, in order to draw the correct conclusions.Only in this way can we really play the role of airtightness testing in product quality control.

Third, air tightness test case sharing

Brake air tightness test case, test pressure 15kPa, final test leakage value 1Pa

By analyzing real-world examples, we can better understand the common cases where the result is not 0 and provide a basis for further optimization of the design process.

IV. Recommendations for improving airtightness

Starting from the design, materials, process and other aspects, take targeted measures to improve airtightness performance. Make full use ofpositive pressure detectorThe strengths of the product are thoroughly evaluated and improved to ensure that the final quality is up to standard.

V. Summary

Positive pressure airtightness test results are usually not 0. This is because in real production, a product with no leakage at all is almost non-existent, but this does not mean that the product is not airtight.The key is that we have to know how to look at these data, combined with the actual situation to judge, so as to ensure that the airtightness test really play a role. In this way, we can use this technology, and constantly improve the quality of products, so that consumers are satisfied.
In this process, domestic companies like JCGK Precision Engineeringleak detectorJCGK has been developing new technologies to introduce smarter and more accurateAir tightness testing equipmentWith JCGK's technology, we believe that our manufacturing industry can take a new leap forward in quality control. With the technical support of JCGK, we believe that our manufacturing industry will usher in a new leap in quality control!