Control valves

Details Control valves Control valves

F - Mech Eng,Light,Heat,Weapons

16

K

251/12, 251/27

F16K 31/126 (2006.01) F16K 1/22 (2006.01) F16K 17/32 (2006.01)

Patent

CA 1084475

ABSTRACT An installation control valve, for example for use in a fire fighting sprinkler installation, comprises a pivotal butterfly valve disc co-operable with a movable stop, which in one position abuts the valve disc to retain the valve closed against pressure forces acting thereon. A retaining mechanism is releasably held to resist stop movement and so prevent valve disc opening but is operable under a predetermined condition to permit stop movement from said one position to a second position. When the stop is in the second position, unequal pressure forces on either side of the valve disc cause same to move thereby opening the valve.

305650

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