Weighing, Dosing & Loss-in-Weight Feeding worked example

Bulk Density Adjustment with volumetric feed rate at reference density of 50 units: a worked example

Suppose volumetric feed rate at reference density falls to 50 units. This page works the full calculation at that level so you can see exactly which result moves and by how much. Bulk density adjustment corrects a feeder's expected throughput when the material's packed density drifts from the reference value used at calibration.

The inputs for this scenario

  • Volumetric feed rate at reference density: 50 units (the input this scenario stresses; the baseline uses 100)
  • Reference bulk density of the material: 4 units (held at the documented default)
  • Density ratio correction factor: 0.01 x (held at the documented default)
  • Feeder efficiency / process multiplier: 1 x (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Bulk Density Adjustment = first factor × second factor × conversion factor × process multiplier.
  • Result works out to 1 units at these inputs, and this is the headline figure for the scenario.
  • Base product works out to 1 value at these inputs.
  • Multiplier works out to 1 x at these inputs.
  • Factor A x B works out to 200 value at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where volumetric feed rate at reference density sits at 100 units and the headline result is 2 units, this scenario comes in 50% below the baseline at 1 units.
  • It multiplies a reference feed rate by the material's density factors and a feeder efficiency multiplier to give the density-corrected throughput. When the numbers land here, the stressed input is the lever to work; the walkthrough above shows exactly how much each output recovers as it climbs back toward the baseline.

Results at a glance

  • Result: 1 units (headline result)
  • Base product: 1 value
  • Multiplier: 1 x
  • Factor A x B: 200 value

Run it with your numbers

  • To rerun this with your own numbers, open the live Bulk Density Adjustment calculator, set volumetric feed rate at reference density to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.