公开(公告)号：US20220090684A1

公开(公告)日：2022-03-24

申请号：US17418016

申请日：2019-12-26

Applicant: KITZ CORPORATION

Inventor： Takeshi GOMI

IPC: F16K1/226

Abstract: [Problem] To provide a centric butterfly valve which has favorable sealability around stems and small open/close operation torque and is also excellent in durability. [Solution] A centric butterfly valve (1) in which top and bottom boss surfaces (19, 29) are formed to be spherical, an outer peripheral end of the blade portion of the valve disk (24) is formed to be an M-shaped section part (29) with round-shaped apex parts (27) and a round-shaped valley part (28) smoothly linked, and the centric butterfly valve has a valve disk (3) having an extended part (41) obtained by successively and slightly extending the spherical surface of each of the top and bottom boss surfaces (19, 20) to a blade portion (40) side.

公开(公告)号：US20160208936A1

公开(公告)日：2016-07-21

申请号：US14913547

申请日：2014-08-28

Applicant: KITZ CORPORATION

Inventor： Takeshi GOMI ,  Ronald GUENTHER ,  Osamu WATANABE

IPC: F16K5/20 ,  F16K5/06

CPC classification number: F16K5/201 ,  F16K5/0605 ,  F16K5/0626 ,  F16K5/0694 ,  H01M8/04201

Abstract: A high-pressure trunnion ball valve which is particularly suitable for a high-pressure fluid, the high-pressure trunnion ball valve is composed of a ball (10) rotatably provided in a body (3) having a lid member (2), a seat retainer (11) seal-connected to the ball, a spring member (12) applying an elastic force to the seat retainer to a seal side, and a seal member (13) attached to an outer circumferential face of the seat retainer. An upper stem (50) and a lower stem (51) having the same diameter are provided on an upper side and a lower side of the ball in an extending manner, respectively, to constitute a ball member (52), shaft-attaching seal mechanisms (20) having the same structure are attached to the upper and lower stems at symmetrical positions regarding the ball to achieve a balance structure, thereby avoiding thrust loads.

Abstract translation: 一种特别适用于高压流体的高压耳轴球阀，高压耳轴球阀由可旋转地设置在具有盖构件（2）的主体（3）中的球（10）组成， 密封连接到球的座椅保持器（11），向座椅保持器向密封侧施加弹性力的弹簧构件（12），以及附接到座椅保持器的外周面的密封构件（13）。 具有相同直径的上杆（50）和下杆（51）分别以延伸方式设置在球的上侧和下侧，以构成球构件（52），轴附接密封 具有相同结构的机构（20）在关于球的对称位置处附接到上杆和下杆，以实现平衡结构，从而避免推力载荷。

公开(公告)号：US20220364647A1

公开(公告)日：2022-11-17

申请号：US17873750

申请日：2022-07-26

Applicant: KITZ CORPORATION

Inventor： Takeshi GOMI

IPC: F16K1/226 ,  F16K25/00

Abstract: A centric butterfly valve (1) in which top and bottom boss surfaces (19, 29) are formed to be spherical, an outer peripheral end of the blade portion of the valve disk (24) is formed to be an M-shaped section part (29) with round-shaped apex parts (27) and a round-shaped valley part (28) smoothly linked, and the centric butterfly valve has a valve disk (3) having an extended part (41) obtained by successively and slightly extending the spherical surface of each of the top and bottom boss surfaces (19, 20) to a blade portion (40) side.