Liquid Filling Machine —Factory Direct

Piston Filler

The most common enquiry we get is for sauce, edible oil, shampoo, or lotion — all medium-viscosity products that need consistent fill volumes across shifts. Piston fillers are the right answer for this range (100–5,000 cP), and they are what most production lines in food, personal care, and agrochemicals actually run.

What separates piston fillers is that the fill volume is mechanically set, so drift over a shift is minimal — we typically see ±0.5–1% in production vs ±2–3% with time-gravity alternatives. The trade-off is that they require more frequent seal inspection with abrasive or highly acidic products.

• Fill range:20 ml – 5,000 ml
• Speed:Up to 3,000 containers/hr (single-head auto)
• Accuracy:±0.5–1% at production scale
• Viscosity range:100–5,000 cP
• Contact material:304 SS standard, 316L upgrade

Overflow / Time-Gravity

For water-thin liquids — beverages, water, alcohol, light chemicals — overflow fillers consistently fill to the same visible level regardless of small volume variations. They are fast and gentle on carbonated products but are not the right choice for foaming or high-value liquids where per-fill volume matters precisely.

• Fill range:50 ml – 2,000 ml
• Speed:Up to 8,000 containers/hr (8-head)
• Accuracy:±1–2% volumetric
• Viscosity range:Below 100 cP

Pump Filler

Honey, thick lotions, adhesives, and pastes above 5,000 cP need positive displacement pump fillers — gear pump for most applications, lobe pump for hygiene-critical food products. These handle viscosities that would stall a piston filler and allow heated product lines for substances that thicken at ambient temperature.

• Fill range:5 ml – 20,000 ml
• Speed:500–2,000 containers/hr
• Accuracy:±1–2%
• Viscosity range:5,000 cP and above

Gravimetric

Gravimetric filling measures by weight rather than volume, eliminating the accuracy drift that volumetric machines experience when liquid temperature, density, or foam levels vary. Pharmaceutical manufacturers, premium agrochemicals, and high-value specialty chemicals typically specify this type. Accuracy at production scale is ±0.1–0.3%.

• Fill range:100 ml – 25 litres
• Speed:500–2,500 containers/hr
• Accuracy:±0.1–0.3% (production scale)
• Best for:Pharma, agrochem, high-value liquids

Automatic

PLC-controlled, conveyor-integrated lines that handle infeed, filling, capping, and labelling without manual intervention between fills. Standard configuration is 4–16 fill heads with HMI set-point programming. Most buyers running more than one shift per day find the payback on a fully automatic line against semi-automatic is under 18 months.

• Heads:4, 8, 12, or 16 head configurations
• Speed:4,000–30,000+ containers/hr
• Control:Siemens / Delta PLC, HMI touchscreen
• Integration:Capper, labeller, checkweigher ready

Semi-Automatic

Foot-pedal or sensor-triggered single-head fillers for R&D labs, startups, and production volumes under 500 containers/hour. Lower capital cost and simpler maintenance. Not the right choice for 2-shift operations — at that volume, labour cost makes a fully automatic line cost-effective within a year.

• Fill range:5 ml – 5,000 ml
• Speed:500–1,500 containers/hr (operator-dependent)
• Price range:$800–$2,500 typical
• Best for:R&D, startups, small production runs

Liquid is fed from a bulk tank into a small surge tank above the filler heads. The surge tank maintains consistent head pressure regardless of bulk tank level — without it, fill volumes drift as the bulk tank empties. This is the most commonly skipped specification in cheap fillers.

Piston fillers: a precision-ground piston draws a fixed volume per stroke. Overflow fillers: a valve holds open for a timed duration. Gravimetric fillers: load cells measure weight in real time and close the valve when the set-point is reached. Each has different drift characteristics over a shift.

Fill nozzles rise to meet the container bottom (bottom-up filling), then retract as filling progresses to reduce foam and splashing. Anti-drip valves with spring-tensioned seats prevent post-fill dripping. Poor anti-drip design is the source of most contamination and underfill complaints on cheap machines.

Star wheels index containers onto the filler carousel at a controlled rate. After filling, the container exits onto the outfeed conveyor. Checkweigher integration at this stage catches out-of-tolerance fills before capping — particularly important for pharmaceutical and regulated chemical applications.

304 stainless steel contact parts, CIP-compatible nozzle design, and NSF/FDA-compliant seals. Overflow fillers dominate beverage lines. Piston fillers handle sauces, oils, and dressings. CIP systems (Clean-In-Place) are standard, eliminating manual disassembly for daily sanitation. Conventional dyeing uses 80–100 L of water per kg; our CIP systems recover and recycle 60–70% of rinse water.

GMP-compliant build: 316L stainless throughout, Ra ≤0.8 µm surface finish on product-contact surfaces, no dead-legs in the product path. Gravimetric filling is typical for vials, syrups, and injectables where ±0.1% accuracy is a regulatory requirement. Full audit documentation and material traceability certificates provided.

Corrosive liquids require PTFE-lined product paths and 316L stainless. Flammable solvents need ATEX Zone 1 or Zone 2 electrical classification — this must be specified at order stage, not retrofitted. We supply ATEX-rated motors, control panels, and junction boxes as a build option. Buyers in the European market increasingly require ATEX certification for organic solvent lines.

Shampoos, lotions, serums, and creams span a wide viscosity range that often changes seasonally. Piston fillers with interchangeable piston assemblies handle most personal care products. Heated product lines (up to 85°C product temperature) are available for wax-based formulations that thicken at ambient temperature.

Gravimetric filling is standard for high-value concentrates where a 2% overfill on a $40/litre product costs thousands per month in giveaway. Corrosion resistance and ATEX classification are required for most formulations. Container compatibility testing (seal material vs. product) is critical — we provide a material compatibility table in the technical review.

Heavy gear oils and greases above 5,000 cP need gear pump fillers with heated lines for consistent viscosity control. The key specification is fill temperature: most gear oils are specified at 40°C viscosity, but filling typically happens at 20–25°C, meaning viscosity is 3–5× higher than the spec figure. This is the source of most capacity shortfalls on oil filling lines.

Before we quote, we ask for your product’s viscosity (cP), temperature at filling, fill volume range, container geometry, and target speed. This is not a sales exercise — it directly determines which machine category, nozzle type, and contact materials we specify. We have declined orders where the buyer’s stated fill principle was wrong for their product, because a failed installation is worse for both parties than no sale.

CE marking on imported machinery is only legally valid if the manufacturer holds a complete technical file: risk assessment, wiring diagrams, component conformity, test records. We have provided these documents for buyers who needed them for customs clearance in Germany, France, and the UK. Ask any supplier for their technical file — the answer tells you quickly whether their CE mark is substantive or decorative.

We run every automatic line at rated speed with water before shipment and provide a signed test report: actual BPH achieved, fill accuracy across 30 consecutive samples, and cycle time at each setting. Buyers who have had equipment arrive slower than spec’d and had no recourse understand why this matters. The test report gives you a performance baseline to hold us to.

Standard machines ship with a 2-year consumable kit: seals, nozzle O-rings, fuses, and the fill nozzle springs that are the first items to fatigue. Waiting 3 weeks for a $15 seal from overseas stops a production line — we have seen it. Custom parts lists are provided so buyers can source locally after the included kit is depleted.

Filling lines shipped since 2008. Every machine leaves our factory with a full-speed fill test report signed by QC.

Fill accuracy on gravimetric models under controlled conditions. Piston models hold ±0.5% across a full 8-hour shift.

Active installations across the US, Germany, Australia, Southeast Asia, and the Middle East. Local spare-parts stock available in key markets.

Full CE technical file included. We do not sell CE-marked machines without the declaration of conformity and risk assessment documentation.

Net weight and gross weight filling for powders, granules, and free-flowing dry products. Often integrated on the same line as liquid fillers for mixed-product facilities.

Auger and impeller-based filling for fine powders and poor-flowing products. Covers the dry side of what liquid fillers can’t handle.

Complete turnkey packaging systems integrating filling, sealing, checkweighing, and palletising. Includes liquid filler as a line component.

Standalone gravimetric packing scales for industrial materials. Gravimetric fill principle used in our liquid weighing fillers is the same underlying technology.