Low flow-restriction shut-off valve with excess flow closure functionality
AssigneeEmerson Process Management Regulator Technologies, Inc.
InventorsJuan M. Diaz, Roy R. Pelfrey, Tung K. Nguyen, Nadim Ahmed
Life of this patent
Estimating the term…
Abstract
A valve including a control assembly that is configured to control fluid flow through the valve, The control assembly includes a driving element and a valve member. The driving element is rotatable about an axis between a first operating state in which the driving element maintains contact between the valve member and a valve seat and a second operating state in which the driving element does not maintain contact between the valve member and the valve seat. The valve member is rotatable about the axis independent of the driving element when the driving element is in the second operating state.
Claims21
A valve, comprising:
- a control assembly that is configured to control fluid flow through the valve, the control assembly comprising a driving element and a valve member,
- wherein the driving element is rotatable about an axis between a first operating state in which the driving element maintains contact between the valve member and a valve seat and a second operating state in which the driving element does not maintain contact between the valve member and the valve seat, and
- wherein the valve member is rotatable about the axis entirely independent of the driving element when the driving element is in the second operating state.
A valve, comprising:
- a valve body that defines at least a portion of a fluid flow path between an inlet and an outlet;
- a valve seat that is positioned along the fluid flow path;
- and
- a control assembly that comprises:
- a valve member that is rotatable about an axis between a first member position in which the valve member contacts the valve seat and a second member position in which the valve member is separated from the valve seat;
- and
- a driving element that is rotatable about the axis between a first element position in which the driving element prevents rotation of the valve member and a second element position in which the driving element permits rotation of the valve member,
- wherein, when the driving element is in the second element position, the valve member is rotatable from the second member position to the first member position when a fluid force that operates on the valve member overcomes a biasing force provided by a valve member biasing element.
A valve, comprising:
- a control assembly that is configured to control fluid flow through the valve, the control assembly comprising a driving element and a valve member,
- wherein the driving element is rotatable about an axis between a first operating state in which the driving element maintains contact between the valve member and a valve seat and a second operating state in which the driving element does not maintain contact between the valve member and the valve seat, and
- wherein, when the driving element is in the second operating state, the valve member is rotatable between a first position in which the valve member contacts the valve seat and a second position in which the valve member is separated from the valve seat, and wherein, the valve member is rotatable independent of the driving element throughout rotation between the first position and the second position.
Dependencies are inferred from the claim text.