1. A diverter or flow controller for controlling a flow on or within an apparatus, including at least one diverter or flow controller element and a plurality of displacement members adapted to move at least part of said diverter or flow controller element into or out of contact with a flow path, wherein each of said plurality of displacement members comprises an expandible bladder and said expandible bladder is individually inflatable or deflatable, and a plurality of actuators, each of which actuates a different one of said plurality of displacement members.