Butterfly valves

Details Butterfly valves Butterfly valves

F - Mech Eng,Light,Heat,Weapons

16

K

251/30

F16K 1/228 (2006.01)

Patent

CA 1299557

BUTTERFLY VALVES Abstract of the Disclosure The present invention comprises a transport system having an annular inflatable seal which has an annular interior domed portion which expands as an integral unit until it contacts the edge of a butterfly valve which engages the domed portion to form a slight recess in the annular seal which provides an airtight and locking seal with the annular seal having a pair of annular resilient legs operable to return the annular interior domed portion to its original position to permit the butterfly valve to be opened.

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