The Automatic Overflow Filling Machine is engineered to deliver consistent fill levels in every container, ensuring a uniform and professional appearance — especially ideal for transparent bottles where visual presentation is key. It is perfectly suited for low to medium viscosity liquids, including foamy or bubbly products such as juice, wine, shampoo, cleanser, sauce, syrup, and chemical solutions. Even if the container volumes vary slightly, the overflow design guarantees that each bottle is filled to the same precise level.
Operating on the overflow filling principle, any excess liquid flows back into the tank, preventing spillage and reducing product waste. This system handles foaming liquids with ease, offering smooth, stable, and high-speed filling performance. The machine is equipped with a PLC control system and a color touchscreen interface, allowing operators to easily adjust parameters, monitor real-time data, and maintain high filling accuracy and flexibility.
Overflow Liquid Filling Machine Main Feature
1.Consistent Liquid Level for Every Bottle
The overflow filling machine ensures that each bottle is filled to the exact same visual level, regardless of small variations in container volume. The overflow return system guarantees uniform appearance, making it the perfect liquid level filler for transparent bottles used in beverages, cosmetics, and chemicals.
2. Advanced Foam Control & Anti-Drip Nozzles
Designed with special overflow nozzles and a back-suction system, this machine effectively removes excess foam and prevents dripping during filling. It’s ideal for foamy or low-viscosity products such as shampoo, juice, wine, detergent, and cleaning solutions — maintaining both precision and cleanliness.
3.Hygienic Design & Easy Cleaning
Built from high-grade 304 or 316 stainless steel, the entire system meets GMP and CE standards. The low-level liquid tank and quick-disassembly structure make cleaning and disinfection simple, ensuring the equipment stays sanitary even in demanding production environments.
4.Fast Adjustment & Quick Changeover
The automatic overflow filling machine supports fast, tool-free changeovers between different bottle shapes and sizes. Operators can easily set filling volumes on the touchscreen, reducing downtime and improving overall productivity.
5. Smart PLC Control & Safety Features
Equipped with PLC control and a touchscreen interface, the overflow bottle filler allows users to monitor operations, adjust parameters, and store multiple filling recipes. Built-in functions like “No bottle, no fill” and photoelectric detection protect against misfeeds and enhance safety.
6. Reliable Performance & Modular Design
With 2–20 filling heads available, this machine offers flexible configurations to match various production capacities. Imported pneumatic components ensure stable operation and long service life. Compact and efficient, it can be easily integrated into a complete automatic bottle filling line with capping and labeling systems.
Technical Parameters
| 1 | Capacity | 800-2500 b/h @ 1L |
| 2 | Filling Volume | 1000-5000ML |
| 3 | Accuracy Liquid level error range | ≤2mm |
| 4 | Power | 2500W, 220VAC |
| 5 | Weight(kg) | 180kgs |
| 6 | Air compressor | ≤0.6Mpa |
How Does Overflow Filling Work?
Automatic overflow filling is designed to control the fill level rather than the fill volume. Bottles are accurately positioned under the filling nozzles, and liquid flows into each container until it reaches a preset height. Any excess product is automatically returned to a recirculation tank, ensuring a uniform liquid level in every bottle—even when slight variations in internal bottle volume exist.
This consistent visual fill is especially important for clear containers and free-flowing, non-particulate liquids where shelf appearance is critical. To reduce foaming and improve filling accuracy, the system uses submerged nozzles and optimized filling profiles.
With PLC/HMI recipe management, changeovers between different products or bottle sizes are quick and repeatable. As a result, overflow filling machines provide an efficient, visually consistent, and reliable filling solution for a wide range of liquid products.
How to Maintain an Overflow Filling Machine？
- Clean System – Rinse filling nozzles and product pathways to prevent residue.
- Check Safety – Test “no bottle, no fill” function and emergency stop.
- Inspect Guides & Connections – Ensure bottle guides, hoses, and clamps are aligned and leak-free.
- Verify Synchronization – Match conveyor speed with nozzle operation.
- Review Settings – Adjust HMI parameters for consistent filling.
Regular maintenance ensures accurate filling, reduces downtime, and extends machine life.
When Should You Choose Overflow Filling versus Volumetric (piston or flow-meter) Filling?
Overflow Filling
- Ensures consistent liquid height, ideal for transparent bottles and products where appearance matters.
- Quick changeovers and good for foamy liquids.
- Slight variations in actual volume may occur.
Volumetric Filling (Piston)
- Delivers exact volume for each container, perfect for thick or particulate products like sauces or lotions.
- Maintains dosing accuracy regardless of minor bottle differences.
- Changeovers and cleaning may take longer.
Quick Guidance:
- Choose overflow filler machinefor visual consistency.
- Choose volumetric filler machine for precise dosing.
