Patent ID: 9103459
Filing Date: 2015-08-11
Classification: F16K,Y10T

Abstract:
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.