A tubular conveyance system includes a pressure sensor, a blower, a material feeder, and a flow control apparatus. The pressure sensor is configured to be associated with a conveyance tube. The blower is configured to accelerate a carrier fluid into the conveyance tube. The material feeder is disposed downstream of the blower and configured to add a conveyance material to the conveyance tube to be conveyed by the carrier fluid. The flow control apparatus is configured to control an amount of carrier fluid provided to the blower. The flow control apparatus includes a mobile plate having a mobile plate opening therein, and a drive mechanism configured to selectively place the mobile plate into an open position and a closed position.