F - Mech Eng,Light,Heat,Weapons – 16 – K
Patent
F - Mech Eng,Light,Heat,Weapons
16
K
26/162
F16K 1/22 (2006.01) B28B 7/22 (2006.01) F16K 1/226 (2006.01) F16K 1/228 (2006.01) F16K 27/02 (2006.01)
Patent
CA 1259782
ABSTRACT A butterfly valve comprises a substantially cylindrical casing having an annular valve seat on its inner peripheral surface, and a valve disk disposed within the casing and rotatable about an axis. The valve disk is formed at an outer peripheral edge portion with an annular groove in which an annular valve seal is partially fitted. The valve seal is adapted for pressing contact with the valve seat at a predetermined pressure and anchored in the annular groove by resin pressure-injected into the annular groove through a resin injection channel in communication with the groove. Accordingly, the seal pressure of the valve seal on the valve seat can be set to the predeter- mined value at all times even if the dimensions of the valve seat and the valve disk and the position of the axis of rotation involve errors.
480822
Nishino Yoshinori
Sonoda Yoshiteru
Suyama Toshio
Uda Tadayoshi
Yamamoto Masahiko
Hitachi Zosen Corporation
Kirby Eades Gale Baker
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