Why does the per-kit cost rise when fewer kits ship?

The fixed procurement and freight dollars do not shrink with the share, so they spread over fewer serviced kits. That is why the per-kit figure can rise even though the campaign costs less in total.

Which kits belong in the required count?

Every seal kit the campaign plans to install: the kits for each serviced valve plus any held as spares for the same seal size. Do not include kits you are not buying in this campaign.

What does the target cost per kit include?

Set the target from the all-in cost you can accept for one serviced kit, freight and procurement included. If the target excludes freight, the comparison will look better than the invoice.

Is the serviced share a percentage of the base?

Yes. It is the share of the installed valve base this campaign reseals, so 50% of a 200 kit requirement means the campaign buys and installs 100 kits.

Industrial Valves, Actuators & Flow Control calculator

Seal Kit Cost Calculator

Price a seal kit campaign where only part of the installed base is serviced, and see the all-in cost per serviced kit against a target. Enter the kits, kit cost, serviced share and fixed freight.

What this calculator does

All-in seal kit cost and cost per serviced kit when only a share of the installed base is serviced.

Formula used

Serviced kits = seal kits required × installed base share ÷ 100
Variable cost = serviced kits × cost per kit
Total cost = variable cost + fixed procurement and freight
Cost per serviced kit = total cost ÷ serviced kits
Cost versus target = cost per serviced kit ÷ target × 100

Inputs explained

Seal Kits Required: Kits the campaign needs, one per serviced valve.
Cost per Seal Kit: Purchase price of one kit at this quantity.
Installed Base Share Serviced: Share of the installed base this campaign reseals.
Fixed Procurement and Freight: Order handling and freight charged for the campaign.
Target Cost per Serviced Kit: All-in cost per serviced kit the campaign must beat.

How to use the result

Best suited to budgeting a partial installed base service, choosing between kit vendors with different freight, setting a per-kit cost target for a campaign.
Quantity price breaks are not carried; if the unit price changes with order size, rerun with the new price. The model stops at installed cost and leaves the labor to install the kits out.

Current U.S. benchmarks

The U.S. has 21,668 machinery manufacturing establishments employing about 1,086,146 workers (Census County Business Patterns, 2023).

Common questions

Why does the per-kit cost rise when fewer kits ship? The fixed procurement and freight dollars do not shrink with the share, so they spread over fewer serviced kits. That is why the per-kit figure can rise even though the campaign costs less in total.
Which kits belong in the required count? Every seal kit the campaign plans to install: the kits for each serviced valve plus any held as spares for the same seal size. Do not include kits you are not buying in this campaign.
What does the target cost per kit include? Set the target from the all-in cost you can accept for one serviced kit, freight and procurement included. If the target excludes freight, the comparison will look better than the invoice.
Is the serviced share a percentage of the base? Yes. It is the share of the installed valve base this campaign reseals, so 50% of a 200 kit requirement means the campaign buys and installs 100 kits.

Last reviewed 2026-10-01.