Pressure drop curve analysis - Determine whether there is a real leak in the vacuum system

Pressure drop curve analysis - Determine whether there is a real leak in the vacuum system

Historical vacuum system data is one of the most valuable tools to understand the performance of large vacuum systems, Experienced technicians will carefully retain historical data, by comparing the current pressure drop curve with the previous cycle, when the system is in good condition can quickly determine the cause of the problem. For example, by looking at the pressure drop curve shown in the figure below, you can determine whether there is a leak. Process conditions under the condition of unchanged and vacuum pump running normally, if there is a real leakage, leakage from outside into the chamber of the gas will cause than normal cavity pressure drop to limit the position of the pressure on the high side when it no longer fall or falling very slowly, the pressure drop curve is similar to the above the top curve. Deflated or virtual leak exists, the gas slowly releases, and put air rate is more and more smaller. the system can achieve the original time limit pressure, but it limits significantly slower, but the pressure drop curve is similar to above the middle that curve.

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