Seal assembly and valve
AssigneeSeaboard Wellhead Control, Inc.
InventorJohn W. Freeman
Life of this patent
Estimating the term…
Abstract
A seal assembly is disclosed in connection with a valve, preferably a sliding gate valve. The seal assembly includes a retaining ring having a surface contour complementary to that on a resilient, replaceable seal element, in order to positively hold the seal in position during use. The ring also includes a threaded portion that may be received in a threaded section either in the valve body or in a separate valve seat collar secured within the valve body. In one embodiment, the seal includes an annular metallic component having an annular groove, into which a resilient component is secured.
Claims10
A seal assembly for use in a valve, comprising:
- an annular collar having an essentially cylindrical inner surface, first and second ends, and an outer surface including (a) a first, essentially cylinder section extending from the first end toward said second end and being suited for fitting into an annular recess in a valve body, (b) a second, essentially cylindrical section having threads thereon, and (c) a third, essentially cylindrical section between said second section and said second end and having an outer diameter less than that of said second section;
- an annular retainer cap having an inner surface including (a) a threaded section complementary to the threads on the second section of the collar to accommodate the cap being threaded onto the collar, (b) a first essentially cylindrical section radially spaced from and facing a portion of the third section on the collar when the cap is threaded onto the collar, and (c) a retaining surface between the threaded and essentially cylindrical sections thereof;
- and
- an annular sealing member for placement between the collar and the cap and including an end face suited for engagement with a valve element and a contour complementary to the retaining surface on the cap.
A valve and seal assembly, comprising:
- a valve having a flow passageway therethrough and a gate member for alternatively shutting off flow or accommodating flow through the passageway;
- the passageway including an annular recess on each side of the gate member;
- a seal assembly in the valve recesses for engaging the gate member at least one of the seal assemblies including:
- an annular collar having an essentially cylindrical inner surface, first and second ends, and an outer surface including (a) a first, essentially cylinder section extending from the first end toward said second end and fitting in the annular recess in the valve, (b) a second, essentially cylindrical section having threads thereon, and (c) a third, essentially cylindrical section between said second section and said second end and having an outer diameter less than that of said second section;
- an annular retainer cap having an inner surface including (a) a threaded section complementary to the threads on the second section of the collar to accommodate the cap being threaded onto the collar, (b) a first essentially cylindrical section radially spaced from and facing a portion of the third section on the collar when the cap is threaded onto the collar, and (c) a retaining surface between the threaded and essentially cylindrical sections thereof;
- and
- an annular sealing member between the collar and the cap and including an end face suited for engagement with a valve element and a contour complementary to the retaining surface on the cap.
Dependencies are inferred from the claim text.