COUPLING APPARATUS FOR USE WITH ELECTRIC ACTUATORS.

摘要

Coupling apparatus for use with electric actuators (102) are described herein. An example coupling apparatus described herein includes a coupling assembly (106) to operatively couple a fluid flow control member (116) of a fluid valve (104) and a drive system of the electric actuator. Rotation of the drive system in a first rotational direction (304) causes the coupling assembly to move in a first rectilinear direction and rotation of the drive system in a second rotational direction causes the coupling assembly to move in a second rectilinear direction opposite the first direction. The coupling assembly includes a biasing element (206) that is to be deflected to provide a seat load to the fluid flow control member when the fluid flow control member is in sealing engagement with a valve seat of the fluid valve and electric power to the electric actuator is removed.