Overflow vacuum filling
Liquid is drawn to the set level and excess product returns through the system.
Consistent visual fill level
Automatic vacuum filling machines for thin liquids in rigid containers
Use vacuum level filling when the finished shelf appearance and consistent liquid height are more important than an identical volumetric dose in every bottle.
- Level-based filling
- Multi-nozzle automatic formats
- Suitable for selected thin liquids
Selection principle
Fill to a level while compensating for small container-volume variation
Vacuum filling draws liquid into a rigid container until a return path reaches the set level. Small variations in the internal volume of glass or rigid plastic bottles can therefore be absorbed while the visible liquid height remains consistent.
The method is most relevant to low-viscosity products and containers that can withstand the operating vacuum. Product recovery, foaming, aroma, hygiene and compatibility with seals and hoses must be reviewed before the route is selected.
Machine routes
Compare the main automatic filling approaches
The final route should be confirmed against representative product and containers.
Enclosed multi-head filling
Several nozzles operate together within a guarded automatic machine.
Compact line integration
Vacuum filling can be arranged with cap placement, crimping, labelling and coding.
Product recovery control
Return paths and reservoirs must minimise contamination and preserve the product.
Operating sequence
How an automatic filling cycle is built
The details differ by machine, but these stages define the core control problem.
- 1
Seal the nozzle
The bottle neck and nozzle establish the required filling circuit.
- 2
Apply vacuum
Pressure difference draws product into the container.
- 3
Reach the level
The return path controls the visible liquid height.
- 4
Release and transfer
The bottle moves to closure application and finishing operations.
Before quotation
Specification points to confirm
A complete enquiry reduces avoidable assumptions and makes machine comparisons more meaningful.
- Container rigidity: Resistance to deformation under the selected vacuum
- Neck finish: Seal geometry, opening size and dimensional consistency
- Product: Low viscosity, foam, volatility, aroma and hygiene needs
- Fill level: Target height and allowable visual tolerance
- Recovery: Return tank, filtration and contamination controls
- Closure: Screw cap, plug, pump, spray or crimp sequence
| Container rigidity | Resistance to deformation under the selected vacuum |
|---|---|
| Neck finish | Seal geometry, opening size and dimensional consistency |
| Product | Low viscosity, foam, volatility, aroma and hygiene needs |
| Fill level | Target height and allowable visual tolerance |
| Recovery | Return tank, filtration and contamination controls |
| Closure | Screw cap, plug, pump, spray or crimp sequence |
Machine options
Machine configurations to compare
Use these configurations to compare machine routes. Final fill range, speed and accuracy are confirmed against your product, container and line.
LU-YTZL8A eight-head vacuum filler
An enclosed automatic level-filling example for delicate or low-viscosity liquids.
- Eight filling heads
- Indicative output: 20–60 bottles/min
- Indicative level tolerance: ±1 mm
- Indicative viscosity guide: up to 20 cps
Line integration
Plan the complete container journey
A filler performs best when infeed, closure, labelling and accumulation are sized around the same design rate.
- Bottle cleaning or air rinsing
- Vacuum-resistant container handling
- Plug or pump insertion
- Crimping or screw capping
- Label orientation and coding
- Ventilation where volatile products require it
Compare your options
Check closely related filling and line machinery
Compare alternative filling methods and the equipment that may be needed before or after the filler.
Practical answers
Automatic vacuum filling machines FAQs
Answers are general guidance. Final suitability depends on product trials, containers and the confirmed machine specification.
Does vacuum filling put the same volume in every bottle?
It is primarily a level-filling method. If bottle internal volumes vary, the actual quantity may vary while the visible fill height remains consistent.
Can plastic bottles be vacuum filled?
Only if the container is sufficiently rigid and the neck seals correctly. Thin-wall bottles may deform, so samples should be assessed.
Is vacuum filling suitable for viscous liquids?
It is generally used for thin, free-flowing liquids. More viscous products usually require a piston, pump or another positive-displacement route.
Can perfume filling and crimping be combined?
Yes. A compact line can include filling, plug placement and crimping, but product volatility, ventilation and closure details must be considered.
Continue your shortlist
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