Industrial Valves, Actuators & Flow Control worked example

Seal Kit Cost at 72% installed base share being serviced: a worked example

Here is what the math looks like when conditions slip. We hold every other input steady and drop installed base share being serviced to 72%, then walk the calculation through step by step. Estimate total seal kit replacement cost for a valve maintenance campaign from kit count, cost per kit, the share of the installed base being serviced, and fixed procurement or logistics charges.

The inputs for this scenario

  • Seal kits required for the campaign: 120 kits (held at the documented default)
  • Average cost per seal kit: 85 $ / kit (held at the documented default)
  • Installed base share being serviced: 72 % (the input this scenario stresses; the baseline uses 100)
  • Fixed procurement and freight charges: 1,200 $ (held at the documented default)

Working through the calculation

  • The calculation starts from the formula this tool documents: Variable seal kit cost = kits required x cost per kit x installed base share.
  • Total seal kit cost works out to 8,544 $ at these inputs, and this is the headline figure for the scenario.
  • Effective cost per kit (with overhead) works out to 71.2 $ / piece at these inputs.
  • Variable seal kit cost (all kits) works out to 7,344 $ at these inputs.
  • Fixed procurement and freight charges works out to 1,200 $ at these inputs.

How this compares with the baseline

  • Against the tool's baseline example, where installed base share being serviced sits at 100% and the headline result is 11,400 $, this scenario comes in 25.05% below the baseline at 8,544 $.
  • The practical read: the gap between this scenario and the baseline is entirely attributable to installed base share being serviced, so recovering it is worth quantifying in dollars before considering equipment or staffing changes. It assumes one average kit price; mixed valve sizes and elastomer grades (NBR vs FKM vs FFKM) carry very different prices, so blend your average carefully or run size classes separately.

Results at a glance

  • Total seal kit cost: 8,544 $ (headline result)
  • Effective cost per kit (with overhead): 71.2 $ / piece
  • Variable seal kit cost (all kits): 7,344 $
  • Fixed procurement and freight charges: 1,200 $

Run it with your numbers

  • To rerun this with your own numbers, open the live Seal Kit Cost calculator, set installed base share being serviced to your actual value, and adjust the remaining inputs to match your operation.

Last reviewed 2026-05-12.