FlowMarket
Where to source filling machines and bottling lines: FlowMarket is a B2B sourcing network powered by an AI agent. You describe the job — the product with its viscosity, temperature and behaviour, the container type and size range, fill volume and required accuracy, output rate, cleaning regime and any hygiene or metrological approvals — and the AI agent matches you with verified machine builders and distributors, then requests specifications, prices and lead times from every match at once. Getting matched is free for buyers.
Sourcing filling machines
The filling principle is chosen by the product, not by the budget. Viscosity, foaming, particulates, temperature and abrasiveness each rule certain systems out entirely, and a filler selected without them will either miss its accuracy or refuse to run your product at all.
The container matters almost as much. Bottle stability, neck finish and how tightly the sizes are held decide whether a line runs cleanly at rate or jams every few minutes — a filler is only ever as good as the containers fed into it.
Filling principles
Volumetric
Meters a measured volume per cycle, using a piston, a rotary or gear pump, or a timed flow. Piston fillers handle thick and particulate products — sauces, creams, pastes — with excellent repeatability; pump fillers suit thinner liquids at higher speed. Accuracy is stated by volume, so a change in product temperature or density shows up as a change in fill weight.
Gravimetric and flow-metered
Net-weigh fillers weigh each container as it fills and cut off at target, which makes them insensitive to density and foam and the natural choice where the pack is sold by weight. Magnetic-inductive and mass flow meters achieve similar accuracy without moving parts in the product path, which is why they dominate modern beverage and dairy lines.
Gravity, pressure, vacuum and auger
- Gravity & pressure — simple and fast for thin, non-foaming liquids such as water and spirits.
- Counter-pressure — for carbonated products, filling against pressure so CO₂ stays in solution.
- Vacuum — draws product into the container; good for glass and hazardous liquids.
- Auger — meters powders and granules by screw rotation, from spices to cement.
What to specify when sourcing
These details decide both the machine and the price:
- The product — what it is, with viscosity at filling temperature, and whether it foams, strings or settles.
- Particulates — piece size and percentage; they decide nozzle and valve design.
- Temperature & chemistry — fill temperature, pH, solvent or corrosive content, alcohol.
- Container — material, shape, size range, neck finish and closure type.
- Fill volume & accuracy — target and tolerance, and whether you sell by volume or by weight.
- Output — containers per hour at each size, and shift pattern.
- Line scope — rinser, filler, capper, labeller, conveyors, checkweigher — or filler only.
- Cleaning — manual, CIP or SIP, changeover between products, and allergen handling.
- Hygiene & materials — 316L, EHEDG or 3-A design, surface finish, aseptic or clean room.
- Compliance — average quantity rules and e-mark, MID approval, food or pharma documentation, ATEX for solvents.
Foam, viscosity and the legal side of fill accuracy
Two things decide whether a filling line works, and neither is usually in the first enquiry. The first is foam. A product that foams will read as full when it is not, so it must be filled slowly, through a diving nozzle that stays below the surface, or by weight rather than volume — and that choice changes the machine, not just a setting. Say whether your product foams; if you do not know, say that too, and ask for a trial fill. Viscosity behaves similarly: many products are shear-thinning, so a viscosity quoted at rest tells a builder little about how it moves through a nozzle. Give the viscosity at filling temperature and name the product. The second is that fill accuracy is a legal matter, not just a quality one. Prepackaged goods sold in the EU by nominal quantity fall under the average quantity system, with defined tolerable negative errors and a requirement that the average not fall below the nominal — which is why lines routinely give away product to stay compliant. A more accurate filler pays for itself in reduced overfill, so ask for accuracy as a measured standard deviation at your fill volume, not as a percentage claim.