INTERCEPTION LEAK DETECTORS

Compliance leak test system or interception leak test, means a system that is able to measure the leakages in the environment outside of the cavity to test.
The practical example more popular and explanatory is that of loss measurement of the valves shutter: the air is introduced from a side and the leakage is intercepted from the opposite side.
This concept is extensible to every types of component or piece, considering the possibility to enclose the element in a bell and at the same time to pressurize it from the inside.



The value of this system must be found in the high sensibility (referring to the norm: 10 times > than Δp systems and 100 times than flow detectors) and in the elevated speed of test execution.
The high sensibility is due to the possibility to measure the leakage as pressure rise compared to the “zero” environment, then without offset problems.
The elevated speed is due to the fact that, (except particular applications on elastic components), the whole test is executed during the piece pressurization and the result is almost immediate.
In view of the necessity of a test bell execution, the system is suitable for air/nitrogen high pressure tests, also till 180 Bar, because it can be structured in safety way for people and things.
On the opposite, the instrumentation complexity is to be found in the non positive safety pneumatics: it is for that reason that usually these instruments include a traditional leak-flow section in order to verify the correct leak of the closed bell.