Process Manufacturing worked example

Pump Runtime at 12% priming, valve, and line-clear allowance: a worked example

Push priming, valve, and line-clear allowance up to 12% and the picture changes. This example computes every intermediate figure at that operating point. planning pump occupancy for a transfer, unloading, recirculation, or packaging feed step

The inputs for this scenario

  • Required transfer volume: 5,000 gal (unchanged)
  • Measured pump rate: 110 gal / min (unchanged)
  • Priming, valve, and line-clear allowance: 12 % (raised for this scenario; the documented default is 10)

Working through the calculation

  • Applying the documented formula (Base pump runtime = required transfer volume รท measured pump rate) to the inputs above produces each figure below.
  • At this operating point the engine returns 50.91 min for required pump runtime, the number this scenario is built around.
  • At this operating point the engine returns 45.45 min for base pump runtime.
  • At this operating point the engine returns 12 % for pump allowance applied.
  • At this operating point the engine returns 110 pieces / min for measured pump rate.

How this compares with the baseline

  • Against the tool's baseline example, where priming, valve, and line-clear allowance sits at 10% and the headline result is 50 min, this scenario comes in 1.82% above the baseline at 50.91 min.
  • It divides the required transfer volume by the measured pump rate for a base time, then inflates it by a priming/valve/line-clear allowance to give realistic minutes. The value of this scenario is the size of the gap it exposes: that gap, priced out over a year, is the budget you can justify spending to close it.

Results at a glance

  • required pump runtime: 50.91 min (headline result)
  • base pump runtime: 45.45 min
  • pump allowance applied: 12 %
  • measured pump rate: 110 pieces / min

Run it with your numbers

  • Every input above is editable in the live Pump Runtime calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.