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Message No. 12098, Started by b1ueshift on 09/10/03
Can butterfly valves open by themselves from water pressure?

In a proposed fire services development for an aircraft hanger, we plan to install automatic oscillating foam monitors (nozzles) inside the building.  We propose to turn on the water supply with remote actuated butterfly valves (butterfly valves with a quarter turn hydraulic rotary actuator).  The building operator has a similar system in another hangar & advises he does not like this system because in the past, one of the butterfly valves opened by itself (after leaking first) and the nozzle went into full discharge.  These are very big nozzles and are a safety hazard if they discharge when they are not supposed to.

Can butterfly valves fail in this way and what are the alternatives?

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Follow-up Messages (5)
Were the valves installed in the correct direction of the flow?  Were ...
No. 21903, Posted by pfeinstein on 11/16/12, 14:33 PST.
a ball/globe valve would also be usable and would be compatable with the ex...
No. 12117, Posted by rorschach on 09/12/03, 05:56 PST.
Thanks for the replies. Thinking about it further, perhaps that the in...
No. 12112, Posted by b1ueshift on 09/11/03, 15:39 PST.
Maybe it's just me but if the shaft of the butterfly valve is centered the ...
No. 12111, Posted by vispilio on 09/11/03, 15:07 PST.
I am not a specialist in this area but it seems to me the building operator...
No. 12103, Posted by rstone on 09/11/03, 05:29 PST.
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