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US 2004/0016463 A1Published application
Isolation valve assembly
AssigneeOliver Twinsafe Valves Limited
InventorsPaul Shillito, Mark Oliver
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AssigneeOliver Twinsafe Valves Limited
InventorsPaul Shillito, Mark Oliver
Estimating the term…
An isolation valve assembly for use in a pipeline comprises a valve housing (1) body having inlet (12) and outlet (13) openings. In the housing there is disposed a pair of independently operable rotary valve balls (3) each having a port (25) therethrough. The valve balls (3) are each rotatable between an open position in which the respective port is in communication with the adjacent opening and a closed position in which the valve ball closes the adjacent opening. A valve seat (9, 14) supports each valve ball in the housing and a valve seat retention member (10) is disposed in each of the openings (5). The retention member (10) defines a flow passage (11) therethrough for communication with the adjacent valve ball port and has a first end proximal to one of the valve balls. The first end supports said valve seat and a second end has means for engagement to the pipeline. The arrangement allow a relatively large bore valve assembly to have a length conforming to International Standard ANSI B16.10 or equivalent so as to enable a single ball valve assembly to be replaced with a double valve assembly without any modification to the pipework.
An isolation valve assembly for use in a pipeline, the assembly comprising a valve housing body having inlet and outlet openings and in which is disposed a pair of independently operable rotary valve balls each having a port therethrough, the balls being rotatable between an open position in which the port is in communication with the adjacent opening and a closed position in which the valve ball closes the adjacent opening, a valve seat supporting each valve ball in the housing and a valve seat retention member disposed in one of the openings and defining a flow passage therethrough for communication with the adjacent valve ball port, the retention member having a first end proximal to one of the valve balls and which supports said valve seat and a second end for engagement with a pipe-fitting of the pipeline.
An isolation valve assembly according to any preceding claim, wherein the length of the assembly conforms to International Standard ANSI B16.10 or equivalent.
An isolation valve assembly according to any preceding claim, wherein the retention member is substantially wholly received in housing.
An isolation valve assembly according to any preceding claim wherein the retention member is fixed to the housing body.
An isolation valve assembly according to any preceding claim, wherein the valve balls are rotatably disposed on at least one trunnion.
An isolation valve assembly according to any preceding claim, wherein there is provided a recess for a seal in the second end of the retention member.
An isolation valve assembly according to any preceding claim, wherein there is an intermediate wall between the valve balls, the wall supporting on each side said valve seat for each valve ball.
An isolation valve assembly substantially hereinbefore described with reference to FIGS. 1 or 2 to 4 of the accompanying drawings.
Dependencies are inferred from the claim text.