Actuator for well-haed valve or other similar applications and system incorporating same

摘要

An electrically actuated valve and an electrical actuator (10) particularly suited for driving a valve are proposed for regulating a flow. The electrical actuator may include a gear reduction train (76), a brake (78) and a manual input override with clutch protection (80). The electrical actuator can be configured in three different operational modes that provides a predetermined position upon power loss including fail-bias fixed, fail open and fail bias closed. The electrical actuator can be driven for example by using the existing local power supply in wellhead valve systems, typically a solar panel (24) and a battery (26).