Filling Equipment — Flowtek North America
Liquid Filling Machines & Integrated Filling Systems
Industrial liquid filling machines engineered for real-world production. Flowtek selects, configures, and integrates overflow, net weight, piston, flowmeter, and gravity filling systems into complete packaging lines—matched to your product, container, and throughput requirements.
Filling Equipment Selected for Integration
The right filling machine is determined by product viscosity, container geometry, fill accuracy requirements, throughput targets, and the reality of how the line will operate over time—not by what's in stock or what's easiest to quote.
Flowtek supplies and integrates filling equipment as part of complete packaging line projects. Every filler we specify is matched to the application and engineered into the line—with the utility infrastructure, controls, and commissioning needed to make it run consistently from day one.
Filling Systems We Offer
- Overflow filling machines for level-fill consistency
- Net weight filling systems for precision and regulatory compliance
- Piston and positive displacement pump filling machines for viscous and thick products
- Flowmeter filling systems (electromagnetic and mass-flow) for precision volumetric control
- Gravity filling systems for free-flowing liquids
- Rotary filling systems for high-speed production
Need capping, labeling, or conveyance too? Capping Systems → • Labeling Systems →
Liquid Filling Technologies
Each filling technology has a distinct operating principle, accuracy profile, and product compatibility range. Understanding these differences is the starting point for every filling line specification.
Overflow Filling
Fills containers to a consistent visual level by recirculating excess product back to the supply tank. Delivers uniform fill appearance across variable container tolerances—the standard choice for clear bottles where fill-line aesthetics matter.
- Thin to medium viscosity products
- Ideal for oils, beverages, household chemicals, and personal care liquids
- Simple operation, fast speed, easy maintenance
Net Weight Filling
Fills to a precise target weight using load cells—compensating for viscosity variation, temperature drift, and product density differences across SKUs. The preferred method when regulatory compliance, label accuracy, or premium positioning demand tight fill control.
- Premium liquids, regulated products, and export-labeled SKUs
- Strong multi-SKU performance across viscosity changes
- Pairs well with checkweigher and inline reject systems
Piston & PD Pump Filling
Displaces a fixed, measured volume of product per cycle. Piston fillers use a cylinder and piston; positive displacement pump fillers use servo-driven gear, lobe, or progressive cavity pumps for continuous, metered delivery. Both handle thick, viscous, and shear-sensitive formulas that overflow and gravity systems cannot fill reliably at production speeds.
- Lotions, creams, gels, conditioners, and thick specialty products
- Piston for discrete-stroke fills; PD pump for continuous metered delivery
- Available in single-head to multi-head inline configurations
Flowmeter Filling
Uses electromagnetic or mass-flow (Coriolis) flowmeters to measure product volume as it moves through the fill path. Delivers highly repeatable volumetric accuracy across a wide viscosity range, without relying on weight-based systems.
- Electromagnetic meters for conductive liquids; mass-flow for oils and non-conductive products
- Stable performance across temperature and viscosity variation
- Faster cycle times than many gravimetric systems
Gravity Filling
Product flows by gravity from an elevated supply tank through timed or valve-controlled fill nozzles. The simplest fill technology—reliable, easy to maintain, and well-suited to free-flowing, low-viscosity liquids at moderate speeds.
- Water-thin liquids, chemical products, and select specialty applications
- Lower capital cost than pressure or electronic systems
- Best suited to single-SKU or low-changeover operations
Rotary Filling
Containers travel on a rotating carousel through simultaneous fill stations—enabling throughput levels that inline systems cannot reach. Suited to high-volume beverage, spirits, and CPG operations where line speed is the primary constraint.
- 120+ BPM for high-volume production environments
- Beverage, distilled spirits, and large-format CPG lines
- Higher capital and footprint requirements than inline systems
| Technology | Fill Principle | Typical Accuracy | Speed Range | Best Applications |
|---|---|---|---|---|
| Overflow | Level fill via recirculation | ±0.5–1% | Up to 120+ BPM | Oils, chemicals, beverages, personal care liquids |
| Net Weight | Gravimetric (load cell) | ±0.1–0.25% | Up to 120+ BPM | Premium oils, regulated products, multi-SKU lines |
| Piston / PD Pump | Positive displacement (piston or servo-driven pump) | High (volumetric) | Up to 80–120 BPM | Lotions, creams, gels, viscous products, thick specialty formulations |
| Flowmeter | Electromagnetic or mass-flow (Coriolis) volumetric measurement | High (volumetric) | Up to 120+ BPM | Specialty liquids, mid-to-high accuracy applications |
| Gravity | Timed gravity flow | Moderate | Low to mid-range | Water-based chemicals, select thin-liquid applications |
| Rotary | Simultaneous carousel fills | Varies by type | 120+ BPM | High-volume beverage and spirits production |
How We Match Technology to Your Application
There is no universal right answer. The fill technology we recommend is determined by a combination of product, container, accuracy, speed, and operational factors—evaluated together, not in isolation.
Product Properties
Viscosity, foaming tendency, shear sensitivity, temperature at fill, particulates, and chemical compatibility with wetted materials all determine which technology is physically viable.
Container & Closure
Container geometry, material, tolerance variation, neck opening, and closure type affect which fill principles work and what speed is achievable without product loss or cosmetic defects.
Accuracy Requirements
Label declarations, regulatory requirements, give-away targets, and premium positioning determine how tight fill accuracy needs to be—and whether weight-based or volume-based filling is the right approach.
Throughput & SKU Count
Target BPM, number of container formats, changeover frequency, and future expansion plans determine system configuration, head count, and whether inline or rotary architecture makes sense.
Not sure which technology fits your application?
Tell us your product type, viscosity, container format, fill target, and throughput requirements. We'll identify the right technology and outline an integration path.
Filling Systems by Industry
The right fill technology isn't just about the product—it's about the operating environment, compliance requirements, and line conditions specific to each industry. Here's how filling technology selection plays out across the markets we serve.
Edible Oils
Olive, avocado & seed oils
Overflow filling is the preferred technology for most edible oil operations—delivering consistent visual levels in clear bottles. Food-grade wetted materials and CIP-compatible fluid paths throughout.
View edible oils integration →Chemicals
Household & industrial chemicals
Overflow and gravity systems with corrosion-resistant, material-compatible wetted components. Explosion-proof electrical design for classified environments and foaming formulas.
View chemicals integration →Beverage & Spirits
RTDs, wines & distilled spirits
Overflow filling is the industry standard for non-carbonated beverage under 120 BPM—especially lines requiring frequent changeovers or CIP capability. Rotary systems for high-volume operations above 120 BPM. Integrated with rinsing, ROPP capping, and labeling.
View beverage integration →Personal Care
Lotions, soaps & cosmetic liquids
Piston filling for thick lotions and gels; overflow or net weight for liquid soaps and body washes. Multi-SKU line design with fast changeover for high-format-count operations.
View personal care integration →A Filler Is One Component of a Complete Line
Filling accuracy, throughput, and uptime depend on more than the filler itself. Container handling feeding into the fill station, capping integrity immediately after, conveyance balance, and utility reliability all determine whether the line performs to specification under production conditions.
Flowtek integrates filling systems into complete packaging lines—handling everything from equipment selection and layout through utility distribution, commissioning, and operator training. The filler is engineered into the system, not installed in isolation.
What We Integrate Around the Filler
- Container rinsers and product-path sanitation
- Capping: inline, ROPP, pump caps, disc tops, flip tops
- Conveyor, accumulation, and container handling
- Labeling, sleeving, and coding systems
- Checkweighers, inspection, and reject systems
- Electrical distribution, subpanels, and equipment drops
- Compressed air and process utility connections
Need upstream process systems too? Explore Process Systems →
Ready to specify your filling system?
Share your product type, viscosity, container format, fill target, and throughput requirement. We'll identify the right fill technology and outline an integration path that gets the line running to spec.