Subsea valve actuator having visual manual position indicator connected to a manual override shaft
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United States of America Patent
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Aug 11, 2015
Grant Date -
Sep 20, 2012
app pub date -
Oct 19, 2010
filing date -
Oct 21, 2009
priority date (Note) -
In Force
status (Latency Note)
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Abstract
A subsea valve actuator is disclosed, comprising an override shaft (6) reaching from inside a fluid filled and pressure compensated actuator housing (1) to the exterior thereof via a bearing and sealing arrangement (7), wherein a visual valve position indicator (14) is arranged exterior to the actuator housing. The visual indicator (14) is pivotally mounted to the override shaft and guided non-rotatably to be forced in axial displacement on the override shaft when the override shaft is rotated, wherein the mounting of the visual indicator (14) on the override shaft (6) is encased in a fluid filled, pressure compensated indicator mounting enclosure (19) surrounding the override shaft (6) in sealing (26) relation outside of the actuator housing (1).
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