Requirement is to populate Actuator Display Label from control valves on bubble annotation placed on it. This can be achieved by making changes into the schema using class editor. Please refer below snapshot.
NOTE: If you want to see the actuator label on all types of control valves, then you will to perform step 8 to 12 for all control valve type of classes.
http://communities.bentley.com/products/plant/design___engineering/w/plant_design_and_engineering__wiki/18620.actuator-tag-not-placed-with-control-valve
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