As standard, the pressure decay leak test methods can be performed with pressure (P) or vacuum (V) and results identified as dP, dV, dP/dT, or dV/dT. 

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Pressure Decay Leak Test Systems

Pressure decay leak testing is the most commonly used method. Its simplicity makes it easy to automate and to integrate into production/assembly processes.

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In simple terms, the pressure decay test fills a pressure vessel with air until it reaches its target pressure, cuts the air source to isolate the pressure, and measures the decay (loss) of that pressure over a set period of time;  a pressure loss greater than a predetermined setting indicates a leak. The sensitivity and accuracy of the pressure decay measurement is a function of the test part&#;s size and the test time. Most tests can be performed rather quickly, with highly accurate results, but the larger the part, the longer the cycle time that is required to achieve an accurate test result.

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