Helium leak test
A pressure test must be performed before the helium leak test. The description below assumes that the pressure control panel is in safe condition after the pressure test (chapter 5.3.1).
- Connect the helium leak tester to the consumer after the exhaust gas valve.
- Open valves HPI and PLI. Open the pressure regulator fully.
- Set the system under vacuum until the maximum possible value is reached (up to 5 mbar).
- 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:
- Switch off the vacuum.
- Close the waste gas valve on the process.
- Open valve PGI.
- Close valve PGI.
- Disassemble the leak test device and connect the exhaust gas line to valve HPV.
- Relieve the pressure regulator.
- Close all valves.
The system should now be filled with inert gas (approx. 1 bar overpressure) up to the consumer.