Ball valve having metal seat rings

Details Ball valve having metal seat rings Ball valve having metal seat rings

F - Mech Eng,Light,Heat,Weapons

16

K

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F16K 5/00 (2006.01) F16K 5/06 (2006.01) F16K 5/20 (2006.01)

Patent

CA 1076541

BALL VALVE HAVING METAL SEAT RINGS Abstract of the Disclosure This relates to a ball valve of the top entry non-spherical type. A soft metal coating is deposited on that portion of the seat ring which contacts the valve member or ball. The ball and seat assembly is inserted into a valve chamber such that the seat rings are in an unstressed condition. After insertion, the ball is rotated 90° causing the ball to engage the soft metal coating, thereby crushing the soft metal to form a tight seal with the ball. In this manner, the lapping process, generally required when metal seats are employed, is eliminated. Further, the seats may be replaced without replacing the ball.

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