For the hydraulic leak test (liquid leak test), the test item (generally an injector valve) is impinged with an operating fluid (e.g. fuel, Exxsol). As part of the automatic test sequence, a measuring chamber is mated to the valve seat of the test item which detects and measures the smallest quantities of leakage flow. Due to the system’s high measurement resolution, even leaks of < 1µl/min can be detected and measured. Fluid conducting circuits are used in many sectors of the industry. Hydraulic circuits in industrial systems and components of fuel carrying systems in combustion engines are only two examples.
The airtightness of the system is the main factor for the effectiveness and environmental compatibility of these circuits. Both leaks within the circuit (leaking valves) and leaks to the outside must be identified and eliminated to the maximum possible extent.
This is why checking the airtightness (leak test) both during production and in the lab is especially significant. The hydraulic leak test (watertightness test), for example, constiutes a well established method.
0,05mm³/min to 5mm³/min