Nozzle check valve
AssigneeCameron International Corporation
InventorsChristophe Avdjian, Michael G. Dempster
Life of this patent
Estimating the term…
Abstract
The disclosed embodiments include check valves capable of improved dynamic performance (e.g., closing and opening times). The check valves may include an annular disc having an opening. The annular disc may be lightweight and present a reduced surface area to the flow, thus increasing the closure speed of the check valve as well as the opening speed of the check valve. Other components, such as a spacer component, may be reconfigured to modify the check valve for increased performance in a variety of applications, including low flow volume, medium flow volume, and high flow volume applications.
Claims18
A nozzle check valve comprising:
- a valve body;
- a nozzle coupled to an interior of the valve body, the nozzle comprising a first barrel and a shaft, wherein the first barrel surrounds the shaft and the first barrel and the shaft are one-piece;
- an annular disc disposed in the interior of the valve body, wherein the annular disc comprises a second barrel, a disc portion disposed about the second barrel, a central opening disposed between the second barrel and the disc portion, and a plurality of radial arms extending between the disc portion and the second barrel;
- a spacer removably coupled to the annular disc, wherein the spacer comprises a tapered annular portion;
- a diffuser disposed at least partially inside the valve body, wherein the diffuser is configured to directly couple to the shaft, removably couple to the shaft, and removably couple to the nozzle check valve;
- and
- a first fluid passage in fluid communication with the annular disc, wherein the annular disc is configured to move in an axial direction relative to the valve body to open and close the first fluid passage.
A check valve kit comprising:
- a valve body comprising a first fluid flow passage and a second fluid flow passage co-axial to the first fluid flow passage;
- an annular disc positioned internally in the valve body, wherein the annular disc is capable of opening and closing both the first and the second fluid flow passages;
- a spring configured to bias the annular disc into a closed position;
- a spacer, the spacer defines a cavity that receives the spring, the spacer is configured to couple with the annular disc via an anti-rotation feature comprising a radial arm disposed in a slot;
- and
- a diffuser removably disposed at least partially inside the valve body.
A nozzle check valve comprising:
- a valve body;
- a nozzle coupled to an interior of the valve body, the nozzle comprising a barrel and a shaft;
- an annular disc disposed in the interior of the valve body;
- a spacer removably coupled to the annular disc;
- a diffuser removably disposed at least partially inside the valve body, the diffuser defines a cavity that receives the spacer and the shaft;
- and
- a first fluid passage in fluid communication with the annular disc and extending through the diffuser;
- and
- a second fluid passage in fluid communication with the annular disc and extending between the valve body and the diffuser, wherein the annular disc is configured to move in an axial direction relative to the valve body to open and close the first and second fluid passages.
Dependencies are inferred from the claim text.