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     4. Close Vmup

     5. Close the bottle

Purging the He returning line from the tank to HR3:

1. Close V14
2. Open MV102
3. Slowly open V17
4. After purging some He from the line, keep V17 opened slightly to have a flow and connect a purity meter to the vent

After purging: 

1. Close V17 
2. Close MV102