How to Calculate the Total Cost of Ownership (TCO) for a Filling Line

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Fill accuracy is decided by the dosing principle, the product temperature and the condition of the seal, not by the number on the quotation.
Key facts at a glance
What is includedFilling, capping and closing equipment
Filling principlesGravity, volumetric, isobaric, piston, load cell
Capacity2,000-48,000 BPH by configuration
Accuracy basisVolume, weight or fill level
Wetted partsSUS 304 product contact, CIP-ready
Key controlFill accuracy, closure integrity, CIP time

Which filling principle fits this product?

The product fixes the filling principle; output only fixes the size. Still liquid at a steady density runs gravity or volumetric; carbonated product needs isobaric; thick product with solids needs a piston; product sold by weight runs a load cell. Fix the product first; a machine chosen before it is a machine chosen twice.

What actually decides fill accuracy?

Four variables sit behind a fill number: the dosing principle, the product temperature, the bottle geometry, and the condition of the valve or piston seal. A machine that holds its tolerance on the factory test can drift in the plant when the product arrives warmer or the bottle wall gets thinner.

PrincipleDoses byFails when
GravityFill level in the bottleBottle geometry varies
VolumetricChamber volumeValve seal wears
IsobaricVolume under counter-pressurePressure or temperature drifts
PistonDisplacementProduct carries solids
Load cellNet weightProduct temperature moves

A different bottle format means a different unit; see the Gravity Filling Machine for Still Water.

What does CIP take out of production time?

A CIP cycle is measured in tens of minutes to over an hour depending on the circuit and the soil. It is not production time, and a plan that counts it as production will miss its daily output every day. The number belongs in the capacity calculation, not in the shift handover.

The Volumetric Filling Machine for Still Water is the matching unit when this becomes a line project.

How is a filling machine sized for a product that foams?

Foaming product needs a slower fill ramp and often a longer nozzle that reaches below the surface. The machine is the same frame with a different valve and a different cam or recipe. Sizing it on the water rate and hoping the foam settles is how lines end up at half output.

The same question is worked through from another angle in 20 Most Common Questions About Beverage Filling Lines (Answered).

How to read the numbers. Capacity figures are the reference ranges on the product specification. A rated BPH is one format at steady state. Changeover, CIP and downstream stops sit outside it, so size on 0.65-0.85.

Frequently asked questions

What is the difference between volumetric and gravity filling?

Gravity fills to a level set by a tube, so accuracy depends on the bottle. A volumetric filler measures a chamber volume, which keeps it accurate when the format changes. Gravity is simpler and cheaper; volumetric is more repeatable when the bottle changes.

How accurate is a filling machine?

It depends on the principle and the product. A volumetric or load cell filler holds a tighter band than gravity on a variable bottle. The tolerance belongs in the acceptance protocol, measured by weight on a defined sample.

Can one filler run different bottle sizes?

Yes, with change parts: star wheels, guide rails, grippers and a recipe. The parts are cheap compared with the changeover time, which is why most plants specify one dominant format.

What is a monoblock?

A single frame carrying the rinser, the filler and the capper, driven and controlled together. It removes two transfers and the floor space between three separate machines.

Key takeaways
  1. Fill accuracy is a temperature and wear question as much as a machine question.
  2. Each closure family needs its own capping head.
  3. Count CIP as lost production time, not as housekeeping.
  4. Of everything in a line enquiry, the neck finish is the item most often left blank.
About the author
Written by the Sunswell engineering team - led by Howie SUN, Founder & CEO, with 14 years in filling and blow-moulding equipment R&D and turnkey project delivery across 71+ countries.
Last reviewed: 2026-08-28 . Reviewed by Sunswell engineering team
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