Flow control gates are designed for accurate control of the flow of abrasive, powdered materials. In particular they can be mounted in-line with airslides. An integrated aeration line provided at the bottom of the flow control gate assists the flow of material. A positioner can be used to position the vee-notch drum via 4-20mA input signal. A manual override is available to position the gate in case of power or air supply failure to the actuator. Standard sizes include 200, 300, 400, 500, and 600. Other sizes and configurations are supplied on request.