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US 2017/0284549 A1Published application
Double Slip Seal Profile For Plug Valves
AssigneeCameron International Corporation
InventorRobert H. Wolf
Life of this patent
Estimating the term…
Abstract
A slip seal having a double profile provides two barriers to withstand the working pressure of a medium acting against the slip when a plug valve is in the closed position.
Claims13
A seal adapted for use in a slip of a plug valve body, the seal comprising:
- a flat surface extending an entire width and length of the seal on a slip-side of the seal;
- a first and a second outwardly protruding contact surface area on a valve body side of the seal and arranged normal to the flat surface on the slip seal side, said contact surface areas being spaced apart from one another by a recessed valley surface and from a respective outside edge of the seal by another respective recessed valley surface;
- the seal being symmetrical in cross section left and right of a vertical centerline.
(canceled)
A method of sealing a plug valve, the plug valve body including a pair of slips each equipped with a slip seal seat containing a slip seal, the method comprising:
- forming a first and a second seal to withstand working pressure of a medium acting against a respective slip when the plug valve is in a closed position, the first and second seal formed, respectively, by a first and a second outwardly protruding contact surface area spaced apart from one another on a valve body side of the slip seal and arranged normal to a flat surface on a slip side of the slip seal, each said contact surface area spaced apart from a respective side edge of the slip seal by respective recessed valley surface;
- the seal being symmetrical in cross section left and right of a vertical centerline.
A seal adapted for use in a slip of a plug valve body, the seal comprising:
- a flat slip-side side of the seal;
- a double seal profile on a valve body side of the seal;
- the double seal profile including two outwardly protruding contact areas arranged normal to the flat slip-side and spaced apart from one another by a recessed valley and from a respective side edge of the seal;
- the seal being symmetrical in cross section left and right of a vertical centerline.
1 more element
Dependencies are inferred from the claim text.