Subsea valve actuator having visual manual position indicator connected to a manual override shaft
First Claim
1. A subsea valve actuator, comprisingan override shaft that reaches from inside a fluid filled and pressure compensated actuator housing to the exterior thereof via a bearing and sealing arrangement, wherein a visual valve position indicator is arranged exterior to the actuator housing, the visual indicator 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 and wherein the mounting of the visual indicator on the override shaft is encased in a fluid filled, pressure compensated indicator mounting enclosure surrounding the override shaft in sealing relation outside of the actuator housing, and wherein the override shaft is formed with a flow passage by which fluid flow communication is established between the pressure compensated interior of the actuator housing and the interior of the indicator mounting enclosure.
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Accused Products
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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Citations
18 Claims
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1. A subsea valve actuator, comprising
an override shaft that reaches from inside a fluid filled and pressure compensated actuator housing to the exterior thereof via a bearing and sealing arrangement, wherein a visual valve position indicator is arranged exterior to the actuator housing, the visual indicator 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 and wherein the mounting of the visual indicator on the override shaft is encased in a fluid filled, pressure compensated indicator mounting enclosure surrounding the override shaft in sealing relation outside of the actuator housing, and wherein the override shaft is formed with a flow passage by which fluid flow communication is established between the pressure compensated interior of the actuator housing and the interior of the indicator mounting enclosure.
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17. A subsea valve actuator comprising:
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an override shaft a visual valve position indicator disposed exterior to the actuator housing and 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 and wherein the mounting of the visual indicator on the override shaft is encased in a fluid filled, pressure compensated indicator mounting enclosure surrounding the override shaft in sealing relation outside of the actuator housing and in fluid flow communication with an external pressure compensator that is located in an indicator housing included in a penetrator assembly adapted for introducing the override shaft into the actuator housing. - View Dependent Claims (18)
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Specification