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US 2021/0180721 A1Published application
Valve
AssigneeKitz Corporation
InventorsTaisuke MUTO, Tetsuya KOBAYASHI
Life of this patent
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AssigneeKitz Corporation
InventorsTaisuke MUTO, Tetsuya KOBAYASHI
Estimating the term…
A valve in which a backseat structure is formed at a height to easily prevent penetration of fluid with high accuracy from outside a bonnet to inhibit an increase in internal pressure. In a state in which a packing for sealing (5) is attached inside a bonnet (10) in a longneck structure, a stem (3) is axially inserted and a flow path (13) inside a valve box (2) is provided to be opened and closed by a valve body (4). The bonnet is divided into an upper bonnet (11) and a lower bonnet (12) at a position higher than a position at which a fluid flowing inside the valve box ascends in a liquid state. A backseat mechanism (42) has a fixed-side seal surface (21) formed on a lower end side of the upper bonnet and a movable-side seal surface (41) on an outer peripheral surface of the stem.
A valve in which, in a state in which a packing for sealing is attached inside a bonnet in a longneck structure, a stem is axially inserted so as to freely ascend and descend and a flow path inside a valve box is provided so as to be freely opened and closed by a valve body provided at a lower end of this stem, wherein the bonnet is integrally provided in a state of being divided into an upper bonnet and a lower bonnet at a position higher than a position at which a fluid flowing inside the valve box ascends in a liquid state, and a backseat mechanism has a fixed-side seal surface formed on a lower end side of the upper bonnet and a movable-side seal surface formed on an outer peripheral surface of the stem and forms abutting sealing by the movable-side seal surface and the fixed-side seal surface when the valve body is open.
A valve in which, in a state in which a packing for sealing is attached inside a bonnet in a longneck structure, a stem is axially inserted so as to freely ascend and descend and a flow path inside a valve box is provided so as to be freely opened and closed by a valve body provided at a lower end of this stem, wherein the bonnet is integrally provided so as to be in a state of being divided into an upper bonnet and a lower bonnet at a position higher than a position at which a fluid flowing inside the valve box ascends in a liquid state, and a backseat mechanism has a fixed-side seal surface formed on the upper bonnet side and a movable-side seal surface formed on an outer peripheral surface of the stem and forms abutting sealing by the movable-side seal surface and the fixed-side seal surface when the valve body is open.
Dependencies are inferred from the claim text.