| 摘要 |
A valve operator assembly is provided for a valve and comprises a housing (18) adapted to be mounted on the valve, an input member (20) rotatably mounted with respect to said housing, and a transmission mechanism (22) comprising a screw (28) provided with an outer thread, and a nut (32) surrounding and coaxial with said screw, said nut being provided with an inner thread. Magnetized means for attracting metal particles are disposed inside said valve operator assembly. |
