How to Install and Debug the Filling Machine

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A filling machine is specified from the product and the package, and every other number follows: viscosity and carbonation pick the valve, the neck finish picks the capper. Check the liquid level and pressure of the liquid storage tank, conduct filling test, adjust the filling head, and control the bottling liquid level.

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Key facts at a glance
Supply scopeFilling, capping and closing equipment
Filling principlesGravity, volumetric, isobaric, piston, load cell
Output range2,000-48,000 BPH by configuration
Accuracy basisVolume, weight or fill level
MaterialSUS 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. A machine picked ahead of the product usually gets picked again.

Check the liquid level and pressure of the liquid storage tank, conduct filling test, adjust the filling head, and control the bottling liquid level.

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 is the real changeover cost?

The parts cost is small; the time is not. A format change touches star wheels, guide rails, grippers, the cap chute and the recipe. On a line with two formats and two changes a day, the annual hours lost exceed the price of a second small machine in many plants.

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

Which documents belong in the handover pack?

Wiring and pneumatic diagrams, the spare parts list with lead times, the changeover checklist, the CIP recipe and the acceptance record. A line handed over without those five is a line that depends on the engineer who installed it.

The same question is worked through from another angle in How to Troubleshoot Semi-Electric Fillers.

How does the bottle neck finish change the machine?

The neck finish sets the rinser clamp, the filling valve seal and the capping head. A change of a millimetre in the thread is a change of change parts and often of the capper. It is the single most under-specified item in a filling line enquiry.

How to read the numbers. Capacity is quoted as a reference range from the product specification. Changeover, CIP and downstream stops sit outside a rated BPH, so plan 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.

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.

Why does the fill level vary between bottles?

Bottle capacity variation, product temperature, valve wear or foam. On glass, mould-to-mould capacity variation alone is enough to make level filling inconsistent, which is why glass lines often check-weigh.

What spare parts should be kept in stock?

Valve seals, piston seals, capping head inserts, guide rail blocks and one set of change parts for the second format. These are the items that stop a line for days when they fail.

What is the difference between rated BPH and real output?

Rated BPH is a steady-state figure at one format. Real output subtracts changeover, CIP, label changes and downstream stops, which is why planning uses a factor of 0.65-0.85.

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. CIP is downtime; it belongs in the capacity plan, not in the maintenance schedule alone.
  4. Line enquiries rarely specify the neck finish, and it is the item that decides the most change parts.
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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