Submerged hydraulic value actuator with leak protection

摘要

A submerged, valve assembly for controlling flow of fluid (e.g. ballast water) to and from a reservoir (e.g. a ballast tank of a ship. The valve assembly is comprised of a valve which is controlled by a hydraulic valve actuator. A fluid-tight housing encloses the actuator so that any leaking hydraulic fluid will be contained within the housing and will not pollute the surrounding fluid in the tank. The assembly includes a means for detecting any hydraulic fluid which may leak into the housing.