Knowledge about helium leak detection
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Generally, helium leak detection involves two methods: the suction gun method and the negative pressure method. K; m- R3 q. `# U! g% x1 d# v: W The suction gun method, also known as the positive pressure method, is generally used for checking for air leaks; its accuracy is relatively low, and a test pressure of 3~4 Kg is usually sufficient. The negative pressure method involves creating a vacuum at the area to be inspected; generally, a vacuum level of 10 Pa or lower is required to detect leaks, otherwise it is not possible to identify them. As for the test pressure, 1–2 Kg is sufficient. This method is often used in situations where high precision in detecting leaks is required. $ P4 _. F% Q+ I/ M" Z9 x# M" F- T o4 W/ C L4 s6 |, Q8 j In general, for helium leak detection, the helium concentration should be no less than 15%. Chemical Engineering Technology Forum Gift – This is here
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