A pipe supplies sand to a ‘valve’ with ... The rotary air lock can be a simple feeder. A conveyor feeder is a belt at the bottom of the bin. One side has a slight gap between bin and belt.

Oil Resistant Conveyor Belts, SAR-36 Fusion Belt(Combination of Fabric Belt and Steel Wires), STA(Bullet Proof Aramid Fabric), Pipe Conveyor Belts (Streamlined Material Transportation with ...