Helium Recovery Line
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As of May 18, 2018, the Yavuz lab is hooked up to the University's helium recovery system. The recovery system connects to equipment that outgasses helium and pipes it back to the liquid helium and nitrogen facility in Engineering Hall.
There are two inputs to the system in the lab. Each input consists of a check valve, a purge valve, and a valve to the main line.
The check valve is to make sure that no helium that is already in the system leaks into the lab due to the fact that the system is slightly above atmospheric pressure. You do not need to worry about the check valve, since it regulates itself.