Butterfly valve

Details Butterfly valve Butterfly valve

F - Mech Eng,Light,Heat,Weapons

16

K

F16K 1/22 (2006.01)

Patent

CA 2043159

S P E C I F I C A T I O N 1 . T I T L E O F T H E I N V E N T I O N A Butterfly valve 2 . A B S T R A C T O F T H E I N V E N T I O N At the outer-periphery contact portion of a butterfly disk of a butterfly valve, the sealing area close to the shaft is formed smaller than other sealing areas. Thus, when the valve is closed by the butterfly disk, the outer-periphery contact portion of the butterfly disk almost simultaneously starts contacting a seat ring throughout the periphery because the area of the portion is smaller than other sealing areas. Therefore, the sealing effect for a long time is expected because the shaft is hardly scratched and the seat ring is hardly abraded. - 1 -

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