Helium leak test

A pressure test must be performed before the helium leak test. The description below assumes that the High pressure panel is in a safe condition after the Pressure test with purge gas.

1. Connect the helium leak tester to the consumer after the exhaust gas valve.
2. Open valves HPI and PLI.
3. Set the system under vacuum until the maximum possible value is reached (up to 5 mbar).
4. Spray joints and components with helium starting from above.

The leakage rate should be at least 1x10^-8 mbar l/s He.
If the test is passed:

1. Switch off the vacuum.
2. Close the waste gas valve on the process.
3. Open valve PGI.
4. Close valve PGI.
5. Disassemble the leak test device and connect the exhaust gas line to valve HPV.
6. Close all valves.

The system should now be filled with inert gas (approx. 1 bar overpressure) up to the consumer.