Comment mrc SNF 2011-04-16 09:18:04: Stiff gate valve
wslee at snf.stanford.edu
wslee at snf.stanford.edu
Sat Apr 16 09:18:05 PDT 2011
When the gate valve is almost closed, it becomes stiff. Once or twice, when I shut the gate valve, the pressure jumped to about 150 mTorr (no gases flowing).
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