How to make a vacuum vessel airtight?
Thread Content
Many devices these days come equipped with vacuum systems. I wonder how the vacuum systems in various devices maintain their airtightness?
24-hour vacuum test, with a pressure increase rate of no more than 5%
Conduct a sealed pressure increase test: the pressure increase rate over 24 hours shall not exceed 5%
First, a positive pressure test is conducted; after the leakage points are fixed, a pressure retention test is carried out. If the pressure retention test is successful, a vacuum pressure retention test is performed by evacuating the area, and the test is considered passed once the pressure reaches the specified level within the given time!