Three questions determine almost everything about liquid filling machine selection: How viscous is your product? How large is the fill volume? What type of container or pouch are you filling? Answer these three and the right machine becomes clear.
The Viscosity Guide: Start Here
Viscosity — how thick your liquid is — is the primary machine selection driver. Here is a practical guide:
| Viscosity Range | Example Products | Recommended Filler |
|---|---|---|
| Water-thin | Water, juice, spirits, vinegar, soy sauce | Gravity filler or peristaltic pump |
| Low to medium | Cooking oil, salad dressing, liquid soap, milk | Pump filler (gear or peristaltic) |
| Medium to high | Ketchup, BBQ sauce, shampoo, conditioner | Pump filler (lobe/gear) or piston filler |
| High viscosity | Jam, honey, peanut butter, thick cream | Piston filler |
| Very high / chunky | Salsa, pasta sauce with chunks, stew base | Wide-throat piston filler |
Fill Volume: Small Sachets to Large Containers
Fill volume affects nozzle size, fill head count, and cycle time. Key considerations:
- Small fills (sachets, single-serve): Precision metering is critical — small volumes amplify any percentage error. Miniaturized piston or peristaltic systems are common.
- Medium fills (bottles, pouches 100ml–1L): The widest range of filler types is available for this range — gravity, pump, and piston all work depending on viscosity.
- Large fills (gallon jugs, 5L+ containers): Higher capacity cylinders or tanks; multi-head systems help maintain throughput on large-volume fills.
Always specify your minimum and maximum fill volume — not just the most common size — so the machine can cover your full SKU range.
Packaging Type
The container or packaging format is the third major selection factor:
- Flexible pouch / stand-up doypack: Premade pouch filler with appropriate filler head — suitable for all viscosities
- Bottle or jar: Dedicated bottle filler — nozzle dives into container to prevent splashing
- Sachet / pillow bag: VFFS with liquid-capable sealing jaws and appropriate filler
- Bag-in-box: Specialized aseptic or non-aseptic bag-in-box filler
- Tube (cosmetics, food): Tube filler — separate machine category
Temperature: Ambient, Hot-Fill, or Cold-Fill?
Most liquid products are filled at ambient temperature. Hot-fill — where the product is heated to 85–95°C before filling for preservation — requires machines with heat-resistant seals and contact materials. Cold-fill may require insulated tanks or chillers to maintain product temperature.
Always specify your intended filling temperature at the inquiry stage so SunGene can confirm appropriate material choices for all product-contact components.
Automation Level
- Manual: Operator positions container, triggers fill — appropriate for low volume or small-batch artisan producers
- Semi-automatic: Automated fill triggered by container detection, with manual container placement and removal
- Fully automatic: Continuous infeed, filling, capping, labeling — high-throughput, minimal labor
Explore our liquid filling machine range or browse the full machinery catalogue.
SunGene Liquid Filling — What We Offer
SunGene manufactures gravity fillers, pump fillers, and piston fillers for liquid applications across a wide viscosity and volume range. All machines feature SUS304 or SUS316L stainless steel wetted parts, CE certification, and factory-direct pricing from Taiwan. Voltage is configured to your local standard — 220V, 380V, or 480V at 50Hz or 60Hz.
Share your product details using our recommendation form and receive a tailored machine suggestion within one business day.
Frequently Asked Questions
What filling machine is suitable for carbonated beverages?
Carbonated beverages require specialized counter-pressure filling to prevent CO2 loss and foaming. This is a dedicated category separate from standard gravity, pump, or piston fillers. Contact SunGene to discuss carbonated beverage filling requirements.
What is the maximum temperature for hot-fill applications?
SunGene liquid filling machines can be configured for hot-fill applications — typically up to 95°C depending on machine design and sealing materials used. Specify your target filling temperature at inquiry so appropriate materials can be selected.
What fill accuracy can I expect from a liquid filling machine?
Fill accuracy depends on filler type, product viscosity, and fill volume. Piston fillers using positive displacement typically achieve the tightest tolerances. Contact SunGene with your fill weight and product details for specific accuracy confirmation.
Can I fill both cooking oil and water on the same machine?
Filling both water and oil on the same machine is possible but requires thorough cleaning between products. The filler must be compatible with both viscosity ranges. Discuss your multi-product requirements with our engineers at inquiry stage.
What is the minimum and maximum fill volume available?
Fill range varies by machine configuration. SunGene offers liquid filling solutions from small sachet fills to large container fills. Provide your minimum and maximum fill volume requirements at inquiry so we can confirm the appropriate machine configuration.