In this installation, materials are received in 50-pound bags and bulk bags and both are security screened for foreign objects while being conveyed to a weigh hopper, where they are automatically hatched in predetermined weights and discharged into process drums. The picture at right shows the Vac-U-Max bag dump station and bulk bag unloader. The hose connected to discharge of the bulk bag unloader can quickly be shifted to the discharge outlet of the bag dump station.

Material is drawn by vacuum through the air-swept vibrating sieve in center and through the wall to the weigh hopper in an adjacent room, also shown. The control panel for the weigh system is mounted in the wall at left of the hopper.