Butterfly and ball valves

Details Butterfly and ball valves Butterfly and ball valves

F - Mech Eng,Light,Heat,Weapons

16

K

251/29

F16K 1/226 (2006.01) F16B 21/18 (2006.01) F16K 5/06 (2006.01)

Patent

CA 1217466

ABSTRACT OF THE DISCLOSURE In order to provide an unobstructed outer face on a retaining ring for the seal assembly of a butterfly valve, so that the face can make an improved seal with an adjacent pipe end, the retaining ring is held captive in the valve housing by a wire ring, instead of by the usual screws which penetrate the face and inhibit sealing with the pipe end. The wire ring is of regular polygonal shape such that the central portions of its sides are received in a radially outwardly facing groove in the retaining ring, and its corners are received in a radially inwardly facing groove in the housing. A helical lead-in groove in the housing connects with the groove to permit assembly of the retaining ring to the housing by a screwing action.

441057

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