Is one of these filling principles always best?
No. The best route depends on the product, the pack, the cleaning regime, the changeover pattern and the output target.
Guide
A comparison guide for buyers deciding which filling principle fits the product, the pack and the day-to-day operating reality most closely.
Reviewed by the Lancing UK technical team · Updated April 2026
A great many filling projects are really decisions about filling principle rather than about a specific machine model. Peristaltic, piston and gear-pump systems can all fill liquids, but they solve different operating problems and suit different products.
If the shortlist starts and ends with output, buyers can miss the practical issues that shape the line later: product contact path, clean-down time, viscosity range, shut-off quality and the cost of changing product or pack format.
Peristaltic systems are often attractive where smaller-dose liquids, cleaner product paths or easier tubing changes matter. Because the product path can be simpler to change, this route can be helpful for shorter runs or more sensitive liquid applications.
It is not automatically the best route for every liquid, but it is worth considering when cleanliness, dose control and product isolation are high on the shortlist.
Piston systems are often compared for products that need volumetric control and can include thicker liquids or pastes. Gear-pump or related positive-displacement routes can also suit products where controlled delivery, consistency and higher throughput matter.
These systems can be very effective, but they should be judged around the actual product range, cleaning expectations and changeover pattern rather than on specification sheets alone.
The quickest way to narrow the comparison is to ask practical project questions. How often does the product change? What is the true viscosity range? How important is cleanability? What does the bottle or container look like? Is the machine standalone or part of a full line?
Those answers normally make the best route clearer than a generic 'which is best?' conversation ever will.
Lancing UK can help compare filling principles against the actual liquid, pack format, output target and line plan instead of simply listing generic machine types.
Short answers for visitors comparing options or planning the next project step.
No. The best route depends on the product, the pack, the cleaning regime, the changeover pattern and the output target.
Sometimes, but the practical operating window matters. Buyers should test the real viscosity range and the real product-change pattern before assuming one route covers everything.
The two decisions should usually be linked. Filling principle, capping route, labelling and conveyor handling often affect each other.
More guides
Use these routes to continue the shortlist, compare alternatives and move into the right machinery or support page.
Use this guide to narrow the liquid-filling shortlist before choosing a machine model.
A wider planning guide covering product behaviour, pack format and output.
Move into the commercial machinery routes after the comparison.
Useful when thicker liquids and pastes are in scope.
A pack-format route where dosing precision and clean product paths can matter.
Plan how the filler joins the wider line rather than spec it in isolation.