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公开(公告)号：US12038103B2
公开(公告)日：2024-07-16
申请号：US17793488
申请日：2021-02-08
申请人： KITZ SCT CORPORATION
发明人： Hisanobu Iizuka
摘要： A manually-operated diaphragm valve in which the open/close range of a valve disk can be set while compactness is maintained with a simple structure, and a sufficient flow rate at the time of full open is ensured. A valve main body (1) includes a valve disk (12) attached inside a body (10) and a spindle (13) screw-fastened to the body so as to be able to ascend and descend to cause the valve disk to make contact with and go away from a valve seat (14). A handle for manually performing rotating operation of the spindle is mounted above the valve main body. A full-open position adjustment mechanism (20) which limits rotation of the handle on a valve-opening operation side at full open and sets an upper limit of a flow rate when the valve disk is fully open is provided near an upper portion of the valve main body.
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公开(公告)号：US20230122372A1
公开(公告)日：2023-04-20
申请号：US17796135
申请日：2021-02-08
申请人： KITZ SCT CORPORATION
发明人： Katsuhiko HOMMA
摘要： A diaphragm valve includes an outer wall section for valve seat mounting provided in a primary-side opening section, a stepped section provided on the inner periphery of the outer wall section, a seat ring press-fitted into and fixed to the stepped section, a flange section provided in the seat ring, and a press-fitting groove for valve seat mounting configured with a space between the seat ring and the outer wall section and the flange section, in which a valve seat press-fitted into and fixed to the press-fitting groove has an upper portion slightly protruding in a state where an extension section covers a position in the vicinity of a top portion of the outer wall section and an extension section the inner periphery of which is decreased in the upper portion of the valve seat covers a position in the vicinity of a top portion of the seat ring.
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公开(公告)号：US11339880B2
公开(公告)日：2022-05-24
申请号：US17085548
申请日：2020-10-30
申请人： Kitz SCT Corporation
发明人： Hisanobu Iizuka
IPC分类号： F16K7/14 , F16K7/17 , F16K27/02 , F16K31/122 , F16K7/12
摘要： By preventing a twist of the diaphragm when assembled, various adverse effects arising from such a twist of the diaphragm are completely eliminated. Provided is a set of jigs for assembling a valve including a pair of above and below fixing jigs, a rotation-stop jig, and a fixing means: the rotation-stop jig is inserted and fixed to the above fixing jig in a non-rotational state; the fixing means fixes non-rotatably and attachably the rotation-stop jig and a bonnet of the valve to each other; a body of the valve is inserted and fixed to the below fixing jig in a non-rotational state; the bonnet and the body are fixed independently from each other in a non-rotational state, thereby preventing an outer periphery of a diaphragm from twisting in which a lower surface of an outer periphery of the bonnet and an outer seal part of the body are tightly attached to and hold the outer periphery of the diaphragm.
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公开(公告)号：US10883614B2
公开(公告)日：2021-01-05
申请号：US16473651
申请日：2017-11-15
申请人： Kitz SCT Corporation
发明人： Chokuto Kou
IPC分类号： F16K7/16 , F16K31/163 , F16K31/524
摘要： Provided is a valve actuator in a simple structure and easily downsizable, having reliable valve openability and closability even under high pressure, and also capable of exerting high durability even with a high frequency of valve opening and closing, and a diaphragm valve including this valve actuator. In the valve actuator, a repulsive member provided in an actuator main body, a piston pressed by this repulsive member, and at least two air chambers for moving the piston by an air pressure are arranged and a booster mechanism for exerting a force amplified in a valve-closing direction is accommodated in any of the air chambers.
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公开(公告)号：US10718438B2
公开(公告)日：2020-07-21
申请号：US16204099
申请日：2018-11-29
申请人： Kitz SCT Corporation
发明人： Hajime Horiguchi
IPC分类号： F16K7/12 , F16K25/00 , F16K31/122 , F16K7/17
摘要： To provide a fluid control valve for use under high-temperature conditions and capable of achieving high durability and Cv value stability even with many operations, and a method of assembling the fluid control valve, a fluid control valve includes an annular valve seat provided inside a body having an inflow port and an outflow port and a diaphragm opposed to the annular valve seat to be in contact therewith or away therefrom by an ascending/descending motion of an actuator rod or a manual rod. A contact surface, which is an upper surface of the annular valve seat, to be in contact with and away from the diaphragm has a tapered surface formed along a centripetal direction of the annular valve seat.
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公开(公告)号：US20190178394A1
公开(公告)日：2019-06-13
申请号：US16204099
申请日：2018-11-29
申请人： Kitz SCT Corporation
发明人： Hajime HORIGUCHI
IPC分类号： F16K7/12 , F16K31/122
摘要： To provide a fluid control valve for use under high-temperature conditions and capable of achieving high durability and Cv value stability even with many operations, and a method of assembling the fluid control valve, a fluid control valve includes an annular valve seat provided inside a body having an inflow port and an outflow port and a diaphragm opposed to the annular valve seat to be in contact therewith or away therefrom by an ascending/descending motion of an actuator rod or a manual rod. A contact surface, which is an upper surface of the annular valve seat, to be in contact with and away from the diaphragm has a tapered surface formed along a centripetal direction of the annular valve seat.
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公开(公告)号：US20180283563A1
公开(公告)日：2018-10-04
申请号：US15938414
申请日：2018-03-28
申请人： Kitz SCT Corporation
发明人： Akira GOTO , Hisanobu IIZUKA
IPC分类号： F16K7/17 , F16K31/122
摘要： A metal diaphragm valve includes a body with a valve seat provided to a valve chamber communicating a primary flow path and a secondary flow path, a metal diaphragm having a center portion disposed above the valve chamber, the center portion vertically moving to make contact with the valve seat, and a stem provided above the metal diaphragm so as to be able to freely ascend and descend to cause the center portion of the metal diaphragm to move downward. A flow-path restriction part is provided to a part of the secondary flow path. The metal diaphragm valve is quite suitable as a valve for ALD process, the valve favorably reduces fluctuations of a Cv value due to deformation of a resin-made valve seat with time even after the valve is opened and closed at a level of ten million times while a fluid at high temperatures is flowing.
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公开(公告)号：US11982361B2
公开(公告)日：2024-05-14
申请号：US17796135
申请日：2021-02-08
申请人： KITZ SCT CORPORATION
发明人： Katsuhiko Homma
摘要： A diaphragm valve includes an outer wall section for valve seat mounting provided in a primary-side opening section, a stepped section provided on the inner periphery of the outer wall section, a seat ring press-fitted into and fixed to the stepped section, a flange section provided in the seat ring, and a press-fitting groove for valve seat mounting configured with a space between the seat ring and the outer wall section and the flange section, in which a valve seat press-fitted into and fixed to the press-fitting groove has an upper portion slightly protruding in a state where an extension section covers a position in the vicinity of a top portion of the outer wall section and an extension section the inner periphery of which is decreased in the upper portion of the valve seat covers a position in the vicinity of a top portion of the seat ring.
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公开(公告)号：US11209092B2
公开(公告)日：2021-12-28
申请号：US16581827
申请日：2019-09-25
申请人： Kitz SCT Corporation
发明人： Toshiaki Iwabuchi
摘要： A compact vacuum gate valve capable of reducing a kink and sliding between a seal material and a seal surface, achieving a low occurrence of particles, stably and reliably performing valve-body open-close movements, restricting impulsive sound and vibrations, and also having high durability. The vacuum gate valve includes housing bodies, a valve-body open/close driving body, and a stem provided with a valve body. Each of the housing bodies has therein a piston rod and a cam member with a cam groove. On each side of the valve-body open/close driving body, a cam roller and a fulcrum roller are provided. On an inner side of the housing body, a vertical movement guiding part and a stopper part are provided. A spring for causing the valve-body open/close driving body to ascend is provided between the valve-body open/close driving body and a fixed base part on a fixed side.
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公开(公告)号：US10550947B2
公开(公告)日：2020-02-04
申请号：US15520607
申请日：2016-01-12
申请人： Kitz SCT Corporation
发明人： Goki Koyama
摘要： A block valve and a block valve for a raw material container having a structure in which a retaining part of a liquid material or cleaning fluid is not present inside. In the block valve, a first side of a main flow path in communication with a supply route of a block body and a first minimal port part of a first diaphragm valve in a tilted state with respect to the block body are connected, a second side of the main flow path and a second minimal port part of a second diaphragm valve are connected, a port opening of the second diaphragm valve is in communication with a supply port part, and a joint port part of the first diaphragm valve and a connection line in a vertical direction are connected by a communication path.
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