Seeking advice from industry experts
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How to quickly detect leaks in vacuum pumps and piping systems
It is difficult to conduct inspections under negative pressure; it is best to try doing so under positive pressure.
It is usually detected through positive pressure. Negative pressure – I’ve heard of a specialized device for detecting negative pressure, but it’s expensive, so few people use it
A positive pressure test could be considered; in this approach, the vacuum is broken and nitrogen or compressed air is used to increase the pressure in the vacuum system. Although no sound is heard when there is an internal leak, during a positive pressure test, even a small leakage can be detected through the sound of airflow