Meaning of valve status
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In the flow chart, some valves are labeled FC, some FO, and some LO – what do these labels mean? Is ‘lo’ meant to indicate a locked state or an unlocked state? What is the difference between these two concepts? This post was last edited by Canghai Yili on 2009-4-7 at 07:41
FC stands for accident off, FO stands for accident on; LO has not been seen before – in a flowchart it might represent accident hold or accident on. I think the drawings provided by the design institute should come with explanatory notes, and there should be an explanation of LO in them. This post was last edited by ivu800 on 2009-4-6 10:34.]
FC, accident shutdown； Some are marked FO, indicating an open state in the event of an accident; some are marked LO, meaning \"normally open\". “long open”
FC is accident off, FO is accident on
FC – Fail Close, Fo – Fail Open, LO – Lock Open
FO for accident open, FC for accident close, LO for lock open
I’ve seen “locking open” abbreviated as “CSO”, which stands for Car Sealed Open. It should still be based on the pattern and abbreviation on the cover page of the album.
Agree: FO on floor 6 for opening in case of an accident, FC for closing in case of an accident, LO for locking open