Butterfly valves
AssigneeHamilton Sundstrand Corporation
InventorPaweł Kwaśniewski
Life of this patent
Estimating the term…
Abstract
A valve disc for a butterfly valve. The valve disc includes a disc body, a main groove suitable for receiving a seal element, and an introduction groove. The disc body comprises first and second faces, an outer periphery, and at least one engagement means configured to receive a shaft for coupling the valve disc to a valve body of the butterfly valve. The main groove extends along the outer periphery to form a continuous groove. The introduction groove has a centreline (CL2) and extends from a groove mouth opening in one of the faces of the disc body to an intersection with the main groove. The main groove is so dimensioned and configured that a seal element can only be inserted into or removed from the main groove via the introduction groove. Optionally, the valve disc is a single continuous body of material.
Claims18
A valve disc for a butterfly valve, the valve disk comprising:
- a disc body, wherein the disc body comprises:
- first and second faces;
- an outer periphery;
- at least one engagement means configured to receive a shaft for coupling the valve disc to a valve body of the butterfly;
- a main groove suitable for receiving a seal element, wherein the main groove extends along the outer periphery to form a continuous groove;
- and an introduction groove, wherein the introduction groove has a centreline (CL2) and extends from a groove mouth opening in one of the faces of the disc body to an intersection with the main groove;
- wherein the main groove is shaped so that the seal element can only be inserted into or removed from the main groove via the introduction groove;
- wherein a cross-section of the main groove in a plane perpendicular to the direction in which the main groove extends (CL1) is a shape such that the seal element cannot be pulled out of the main groove other than in a direction along the centreline (CL2) of the introduction groove.
A valve disc for a butterfly valve, the valve disk comprising:
- a disc body, wherein the disc body comprises:
- first and second faces;
- an outer periphery;
- at least one engagement means configured to receive a shaft for coupling the valve disc to a valve body of the butterfly;
- a main groove suitable for receiving a seal element, wherein the main groove extends along the outer periphery to form a continuous groove;
- and
- an introduction groove, wherein the introduction groove has a centreline (CL2) and extends from a groove mouth opening in one of the faces of the disc body to an intersection with the main groove;
- wherein the main groove is shaped so that the seal element can only be inserted into or removed from the main groove via the introduction groove;
- wherein the centreline (CL2) of the introductory groove intersects the main groove at an included angle (α) of between one of 5 degrees and 80 degrees.
A method of manufacture of a butterfly valve comprising:
- providing a valve body, providing a valve disc, the valve disc comprising:
- a disc body, wherein the disc body comprises:
- first and second faces;
- an outer periphery;
- at least one engagement means configured to receive a shaft for coupling the valve disc to a valve body of the butterfly;
- a main groove suitable for receiving a seal element, wherein the main groove extends along the outer periphery to form a continuous groove;
- an introduction groove, wherein the introduction groove has a centreline (CL2) and extends from a groove mouth opening in one of the faces of the disc body to an intersection with the main groove, wherein the main groove is shaped so that the seal element can only be inserted into or removed from the main groove via the introduction groove;
- and the seal element retained in the main groove;
- providing at least one shaft;
- placing the valve disc in the valve body;
- engaging the at least one shaft and an engagement means on the valve disc;
- and coupling the valve disc to the valve body via the at least one shaft;
- wherein one of the at least one shafts intersects the centreline (CL2) of the introduction groove of the valve disc.
Dependencies are inferred from the claim text.