The PSW sweep auger conveyor is a device for unloding of grain that has not got onto the underfloor conveyor in a gravitational way. Usually, it is 15-20% of the silo capacity.
The PSW conveyor transports grain along the silo radius to the central grain inlet (the inlet to underfloor conveyor), simultanously moving clockwise around silo axle (when looking towards the silo floor). This way the grain remaining in the silo is unloaded, until the conveyor makes almost a full turn.
BIN produces internal sweep auger conveyors designated for relevant silos.