Apparatus to determine a position of a valve

摘要

Methods and apparatus to indicate a position of a valve are described. An example position indicator apparatus includes a follower operatively coupled to a flow control member of a valve to sense a displacement of the flow control member. The example apparatus further includes a status indicator to provide an indication that corresponds to the displacement of the flow control member to determine one of a plurality of predetermined operational positions of the valve and a visual display to cooperate with the position indicator to indicate a position of the valve corresponding to one of the plurality of predetermined operational positions of the valve.