| 摘要 |
A valve operator assembly is provided for a valve and comprises a housing (18), an input member (20) rotatably mounted with respect to said housing, and a transmission mechanism (22) comprising a translating element (24) and provided with a thread, and a rotating element (28) provided with a thread. The assembly further comprises first anti-rotation and axial guide means (56) provided on the translating element (24) of the transmission mechanism and second anti-rotation and axial guide means (58) provided on the housing (18). The first anti-rotation and axial guide means comprise at least one protruding element (60) secured to the translating element. The second anti-rotation and axial guide means comprise at least one straight anti-rotation portion (59) extending axially and cooperating with said protruding element so as to guide axial movements and to prevent angular movement of the translating element (24) relative to the housing (18). |
