| 摘要 |
The invention relates to a valve actuator (1, 22, 29, 35), comprising at least one driving means (2, 3, 4, 14, 23, 36) for driving a valve (8) to be actuated by said valve actuator (1, 22, 29, 35), at least one triggering unit (2, 3, 27, 32) for triggering a movement of said driving means (2, 3, 4, 14, 23, 36) to open and/or to close said valve (8), wherein said triggering unit (2, 3, 27, 32) is a directly driven triggering unit (2, 3, 27, 32), converting an input signal directly into a triggering signal of said triggering unit (2, 3, 27, 32). Additionally at least one mechanical energy storing unit (4, 14) is provided. |
