Define Weight Batching or Dosing Requirements

Weight Accuracy

Metering the material from a bulk bag to provide an accurately weighed amount of material is often a requirement. This can be done in two ways: Loss-in-weight (LIW) or Gain-In-Weight (GIW).

Loss-in-weight: LIW requires that the discharger or a portion of the discharger along with the metering/feeding device are weighed and a control system is used to monitor the loss in weight of the system as material is fed to the next step in the process.

Gain-in-weight: GIW is used when the vessel or container that is being fed by the bulk bag system is on load cells. The control system monitors the gain in weight of the weighted vessel to control the feed device.

Process

Volumetric type feed devices such as flexible screw conveyors, airlock, cable conveyors, etc. can be used to move material from the bulk bag discharger to the next stage of the process. Almost any type of conveyor can be integrated with a bulk bag discharger.