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US 2013/0240772 A1Published application
Valve assembly and components therefore
AssigneeXamol Limited
InventorStuart Lomax
Life of this patent
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AssigneeXamol Limited
InventorStuart Lomax
Estimating the term…
The invention relates to a valve assembly which includes at least one, but typically two, balls located along a passage and which balls can be moved between open and closed positions to selectively control the passage of fluid along the passage. The valve assembly includes at at least one end thereof a retaining assembly which allows the effective sealing against one surface of a ball and retention of the same in position. A sealing assembly is also provided when two balls are provided, intermediate the same, which allows effective sealing to be achieved and at least one of the two trunnions which allows each of the balls to be mounted within the valve body is located only internally of the valve body. The components of the valve assembly which are located within the same can in one embodiment all be inserted into and located within the valve body from one common end.
A valve assembly, said valve assembly including a valve body having a fluid passage therein and at least one ball mounted in the passage, said ball moveable between a first position in which a channel in the ball is provided substantially in line with the passage so as to allow fluid to flow there through and a second position in which the ball substantially prevents fluid from passing along the passage, said ball mounted on first and second trunnions so as to be rotatable and wherein at least one of said trunnions is mounted and located internally of the valve body.
A valve assembly according to any of the preceding claims wherein when two balls are provided a sealing assembly is provided between the first and second balls so as to locate with the respective opposing sides of the balls which face towards each other.
A valve assembly according to claim 12 wherein the sealing assembly comprises a first annular seat for contact with a face of a first ball and a second annular seat for contact with a face of the second ball and said first and second seats are provided with at least one biasing means depending between the same.
A valve assembly according to claim 13 wherein a plurality of biasing means are provided spaced apart around a circular path at the periphery of the said passage.
A valve assembly according to any of the preceding claims wherein the at least one ball is mounted on first and second trunnions so as to be rotatable.
A method for forming a valve assembly including a valve body, a passage passing through the valve body and at least one valve ball provided in the said passage, said valve ball having a channel therethrough and selectively rotatable with respect to the valve body to move the same between an open position in which the channel is in line with the passage and a closed position, said valve ball mounted with respect to the valve body via at least one trunnion, wherein the said trunnion is introduced into position within the valve body by first placing the ball into position in the valve body and then passing the trunnion into the channel in the ball and into and through a locating aperture in the ball and into a receiving recess in the valve body so that the trunnion is located between the recess and the locating aperture.
Dependencies are inferred from the claim text.