Industrial Valves, Actuators & Flow Control worked example

Seat Leakage Test Time at 23% setup, documentation, and retest allowance: a worked example

This scenario runs the seat leakage test time calculation on the strong side: 23% setup, documentation, and retest allowance, with every other input held at its documented default. Use this when scheduling seat leakage tests per API 598, MSS SP-61, or ISO 5208 to confirm your test bench capacity can handle the production queue this week.

The inputs for this scenario

  • Valves queued for seat leakage test: 40 valves (unchanged)
  • Average test cycle time per valve: 15 min / valve (unchanged)
  • Setup, documentation, and retest allowance: 23 % (raised for this scenario; the documented default is 20)

Working through the calculation

  • Applying the documented formula (Base test hours = valves queued x test cycle time per valve (converted to hours)) to the inputs above produces each figure below.
  • At this operating point the engine returns 3.28 hr for total seat leakage test time (hours), the number this scenario is built around.
  • At this operating point the engine returns 2.67 hr for base test time (hours, no overhead).
  • At this operating point the engine returns 23 % for setup and retest overhead added.
  • At this operating point the engine returns 15 pieces / min for valves tested per hour.

How this compares with the baseline

  • Against the tool's baseline example, where setup, documentation, and retest allowance sits at 20% and the headline result is 3.2 hr, this scenario comes in 2.5% above the baseline at 3.28 hr.
  • Use it when scheduling the leak-test station for a production batch, quoting a test-only subcontract job, or sizing how much QC capacity a release of valves will consume. Treat this as a target state: the delta against the baseline quantifies what the improvement is worth before you commit to chasing it.

Results at a glance

  • Total seat leakage test time (hours): 3.28 hr (headline result)
  • Base test time (hours, no overhead): 2.67 hr
  • Setup and retest overhead added: 23 %
  • Valves tested per hour: 15 pieces / min

Run it with your numbers

  • Every input above is editable in the live Seat Leakage Test Time calculator, which recalculates instantly and can be shared with the inputs intact.

Last reviewed 2026-05-12.