Redundant metal-to-metal seals for use with internal valves
AssigneeEmerson Process Management Regulator Technologies, Inc.
InventorsChun Lin, Roy Ronald Pelfrey, Eric Alan Miller
Life of this patent
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Abstract
Redundant metal-to-metal seals for use with internal valves are described. A plug having redundant sealing functionality for use with a poppet of an internal valve includes a tapered surface to sealingly engage a seat of the poppet. Additionally, the plug includes a seal adjacent the tapered surface and disposed in a groove defined by the plug to sealingly engage the seat.
Claims20
A plug having redundant sealing functionality for use with a poppet of an internal valve, the plug comprising:
- a tapered surface to sealingly engage a seat of the poppet;
- and
- a seal adjacent the tapered surface and disposed in a groove defined by the plug to sealingly engage the seat.
A stem assembly for use with an internal valve, comprising:
- a stem having a first end to be engaged by a cam of the internal valve to move the stem to control fluid flow through the internal valve;
- and
- a plug coupled to a second end of the stem opposite the first end and comprising a first sealing surface and a second sealing surface, wherein the first and second sealing surfaces are to engage a seat of a poppet of the internal valve to provide redundant sealing functionality.
An internal valve, comprising:
- a body that defines a chamber, wherein the body includes external threads to threadably engage another body;
- a stem assembly having at least one biasing element, wherein the stem assembly is to exert a force on a poppet to urge the poppet toward the body to control fluid flow through the internal valve;
- a cam rotatably coupled to the internal valve to engage an end of the stem assembly to control fluid flow through the internal valve;
- and
- means for maintaining a gap between the end of the stem assembly and the cam when a seal coupled to the stem assembly is worn or dislodged and the internal valve is in a closed position.
Dependencies are inferred from the claim text.