| CPC F16K 7/07 (2013.01) | 20 Claims |

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1. A flow control system, comprising:
a conduit comprising an interior surface; and
a flow control device connected to the interior surface of the conduit and disposed along the interior surface of the conduit for a first length, the flow control device comprising an expandable element comprising an outer surface and an inner surface having a hollow cylindrical shape, the expandable element configured to expand inwardly from the interior surface from a retracted position to an expanded position, the expandable element defining at least a portion of a flow path configured to control a flow of fluid through the conduit, wherein, in the expanded position of the flow control device, the inner surface is cylindrical along the first length and defines the at least a portion of the flow path.
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