Globe valve and method for making same
AssigneeM&FC Holding, LLC
InventorsEarl A. Bake, Leonard J. Stephens
Life of this patent
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Abstract
A valve is presented comprising a valve body defining a chamber, a valve stem extending into said chamber, a disk attached to the valve stem, a discrete annular seat movably disposed in the chamber, a resilient ring disposed in the chamber adjacent the annular seat, and a retainer fixed in the chamber on a side of the seat opposite from the ring, wherein the ring exercises a bias on the seat in a direction toward the disk, urging the seat into engagement with the disk. The invention further contemplates a method for making the valve.
Claims24
A globe valve comprising
- a valve body defining a chamber,
- a valve stem extending into said chamber,
- a disk attached to said valve stem at an end of said valve stem in said chamber,
- a discrete annular seat movably disposed in said chamber,
- a compressed resilient ring disposed in said chamber adjacent said annular seat, and
- a rigid metal retainer fixed in said chamber and extending inwardly from an internal wall of said chamber and on a side of said seat opposite from said resilient ring,
- wherein said resilient ring, seeking return to its non-compressed state, exercises a bias on said seat in a direction toward said disk, urging said seat into engagement with said disk.
A method for making a globe valve, said method comprising:
- providing a valve body having
- an inlet conduit,
- a valve chamber, and
- an outlet conduit,
- the valve chamber having a shelf-like surface therein;
- placing a resilient ring on said shelf-like surface;
- providing a discrete annular valve seat of hard erosion-resistant material,
- placing said annular seat on said resilient ring with said seat contacting an internal wall of said chamber both upstream and downstream of said resilient ring, said seat having an annular conical surface inclining outwardly in a direction from upstream to downstream, said seat having a surface exposed to said inlet conduit,
- applying a load on said seat, and thereby said resilient ring, to move said seat upstream in said chamber and compress said resilient ring,
- fixing a retainer in said chamber on the downstream side of said seat at a distance from said seat sufficient to permit said resilient ring to regain a substantial part of its non-compressed state before said seat moves into engagement with said retainer,
- inserting through an open end of said chamber a disk and valve stem into the chamber, said disk having an annular conical surface engageable with said seat annular conical surface, and
- closing off said chamber open end.
Dependencies are inferred from the claim text.