| 摘要 |
The invention relates to a device in a subsea system for controlling a hydraulic actuator (1) which is connected to a supply line (2) for supply of a supply fluid to the actuator (1) and a return line (3) for removal of a retu rn fluid from the actuator. The device (10) comprises a housing (11) and a body (29) which is movable in the housing (11), which together define a high- pressure chamber (14), which communicates with the supply line (2), and a lo w- pressure chamber (15), which communicates with the return line (3), and whos e volume is a function of the pressure of the return fluid and the supply flui d. The invention further relates to a subsea system comprising such a hydraulic actuator (1) and a device (10). The invention is particularly applicable for the operation of subsea process valves.
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