Plant Utilities worked example

Vacuum Pump Cost at 65% hours assigned to production: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop hours assigned to production to 65%, then walk the calculation through step by step. Estimate vacuum pump operating cost from runtime, hourly cost, production share, and maintenance consumables.

The inputs for this scenario

  • Vacuum pump operating hours: 240 hr (held at the documented default)
  • Vacuum system cost per hour: 9.5 $ / hr (held at the documented default)
  • Hours assigned to production: 65 % (the input this scenario stresses; the baseline uses 90)
  • Oil, seal, and filter adder: 175 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Total vacuum pump cost = vacuum pump operating hours × vacuum system cost per hour × hours assigned to production + oil, seal, and filter adder.
  • Total vacuum pump cost works out to 1,657 $ at these inputs, and this is the headline figure for the scenario.
  • Cost per item or period works out to 6.9 $ / item at these inputs.
  • Variable vacuum pump cost works out to 1,482 $ at these inputs.
  • Fixed utility adder works out to 175 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where hours assigned to production sits at 90% and the headline result is 2,227 $, this scenario comes in 25.59% below the baseline at 1,657 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to hours assigned to production, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It treats cost per hour as a flat rate and does not model deep-vacuum vs rough-vacuum duty, load/unload cycling, or heat-of-compression on the seal oil, so verify the hourly rate reflects the actual operating point.

Results at a glance

  • Total vacuum pump cost: 1,657 $ (headline result)
  • Cost per item or period: 6.9 $ / item
  • Variable vacuum pump cost: 1,482 $
  • Fixed utility adder: 175 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Vacuum Pump Cost calculator, set hours assigned to production to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.