Pneumatic cut-off valve fault condition
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Can the pneumatic cut-off valve remain in its position during an emergency? The accident condition provided by the design institute is FL; is this accurate? Can the shut-off valve stay in place?
FL means staying in place in the event of a fault. FO means fault open, FC means fault closed.
FL means staying in place in the event of a fault. FO means fault open, FC means fault closed.
FL means staying in place in the event of a fault. FO means fault open, FC means fault closed.
If it’s FL, it should stay in its current position to maintain its place; there are also FC, FO, etc
The person on the second floor is an expert! :handshake
If I remember correctly, FL seems to be related to hovering; our devices usually use fo fc, and once the wind stops, things get chaotic~~~~
Isolation valves are rarely set to FL, and even less so for stop valves. But the control valve will be set to FL. @jiaguoyun
FO FC FL is determined based on specific manufacturing processes or the actual requirements of end-users, with no fixed standard to follow
A shut-off valve serves only to cut off flow; it cannot be adjusted and has only an on and off position. You mean the pneumatic control valve, right? It has an accident hold state. It’s the state before the accident.