Industrial Gases & Cryogenic Systems worked example

Cylinder Fill Cycle Time at 11% purge, leak check, and handling allowance: a worked example

Suppose purge, leak check, and handling allowance falls to 11%. This page works the full calculation at that level so you can see exactly which result moves and by how much. Estimate cylinder filling time from cylinder count, manifold fill rate, and handling allowance for purge, leak check, labeling, and staging.

The inputs for this scenario

  • Cylinders to fill: 120 cylinders (held at the documented default)
  • Measured fill rack rate: 6 cylinders / min (held at the documented default)
  • Purge, leak check, and handling allowance: 11 % (the input this scenario stresses; the baseline uses 15)

Working through the calculation

  • The calculation starts from the formula this tool documents: Base cylinder fill time = cylinders to fill รท measured fill rack rate.
  • Required cylinder fill cycle time works out to 22.2 min at these inputs, and this is the headline figure for the scenario.
  • Base cylinder fill time works out to 20 min at these inputs.
  • Purge, leak check, and handling allowance works out to 11 % at these inputs.
  • Measured fill rack rate works out to 6 pieces / min at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where purge, leak check, and handling allowance sits at 15% and the headline result is 23 min, this scenario comes in 3.48% below the baseline at 22.2 min.
  • It computes required cylinder fill cycle time by dividing the batch size by the measured fill rate, then scaling up by a purge, leak-check, and handling allowance. 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

  • Required cylinder fill cycle time: 22.2 min (headline result)
  • Base cylinder fill time: 20 min
  • Purge, leak check, and handling allowance: 11 %
  • Measured fill rack rate: 6 pieces / min

Run it with your numbers

  • To rerun this with your own numbers, open the live Cylinder Fill Cycle Time calculator, set purge, leak check, and handling allowance to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.