Leak tests for your safety

Assemblies of different sizes are tested for their final tightness using appropriate procedures before delivery. This way, our customers are always sure that no media will leak out and that no unnecessary costs will arise due to disassembly.

What does tight actually mean?

No equipment or system is absolutely leak-proof. In principle, it does not need to be. What is important is that the leaks are small enough and have no influence on the work process. In order to quantify leaks, the term leakage rate was introduced with the formula symbol qL and the unit mbar-l/s. If the pressure in a sealed container with a volume of 1 litre drops by 1 millibar in 1 second at overpressure in the container, it corresponds to the leakage rate qL = 1 mbar-l/s. The leakage rate is always determined at TRI-MATIC after consultation with the customer.

Leak test: filling, calming, measuring and venting

The integral leak test consists of four steps: Filling, calming, measuring and venting. In the filling phase, the test item is pressurised with air and separated from the pressure source after reaching the test pressure or a defined time.

In the calming phase, temperature differences and turbulence are compensated. Media penetrate through narrow cross-sections and seal settling processes take place. Leak tests are carried out at TRI-MATIC with the help of our self-developed test stations.

Each assembly is subjected to the desired pressure and the leakage rate is then analysed. If the pressure drop caused by the leak is greater than the permissible limit value, the leakage rate is reduced.