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The State of the Art in PET Still Water Bottling

A 2019 KHS complete PET line rated at 70,000 BPH (reference NP 692) represents near-current technology in still water bottling. Built during a period of rapid advancement in PET processing, energy efficiency, and automation, this line incorporates the latest generation of KHS InnoPET TriBlock technology with a 96-valve mechanical filler. This article provides a technical overview of the systems and engineering decisions that define a modern high-speed still water production line for the American market.

The KHS InnoPET TriBlock Platform

The InnoPET TriBlock integrates stretch blow molding, filling, and capping into a single compact unit with mechanical starwheel transfers between sections. The 2019 generation benefits from KHS's accumulated experience with this platform, featuring refined transfer geometry for smoother bottle handling, improved servo drive systems for precise speed synchronization, and enhanced HMI interfaces for operator efficiency. The TriBlock eliminates the need for air conveyors, saving approximately 40-60 meters of conveyor length compared to a separated blower-filler configuration. This not only saves floor space but removes the noise, energy consumption, and bottle damage associated with air conveyance at 70,000 BPH.

96-Valve Mechanical Filling Technology

The filler section contains 96 mechanical valves — a configuration that distributes the 70,000 BPH throughput across enough valves that each operates at approximately 729 cycles per hour. This moderate per-valve pace is deliberate: it ensures that each filling cycle has adequate time for complete venting, accurate fill level control, and gentle product handling. The mechanical valve design for still water is established technology with decades of refinement. Each valve opens, allows gravity-driven flow through a vent tube, and closes when the product reaches the preset level. No electronic sensors, no flow meters, no software calibration — just physics and precision machining working together at industrial scale.

Preform Handling and Blow Molding

The preform handling system includes a M. Tanner hopper, elevator, and orientator — industry-standard components that reliably deliver oriented preforms to the blow molder infeed. The Tanner hopper system is known for gentle preform handling that prevents scratches on the preform finish, which could lead to cap seal failures on the finished bottle. The blow molding section of the TriBlock uses high-pressure air from a dedicated compressor to stretch and blow preforms into bottles. The 2019 vintage benefits from the latest oven technology with individually controlled IR lamps per preform zone and energy-recovery systems that recapture waste heat for preform preheating.

Downstream Processing and Packaging

Following the TriBlock, bottles are inspected before entering the labelling section. The labeller applies wrap-around roll-fed labels using electronic cam plates across two stations, providing both redundancy and the capability to apply different labels for multi-SKU operations. A bottle inspector verifies fill level, cap presence, and label placement before bottles enter the KHS Innopack Kisters TSP shrink wrapper. This film-launch machine produces bundles at rates matching the filler output, with the Kisters TSP model offering improved film tracking and sealing compared to earlier generations.

Palletizing: The FKI Logistek Push System

The FKI Logistek A-910 push-type palletizer builds pallet layers using a sweep-and-push mechanism. While the push system is mechanically simpler than robotic alternatives, the A-910 is designed for high-throughput applications and can handle the approximately 2,917 bundles per hour that a 70,000 BPH line producing 24-count packs generates. Pallet storage and an automated interlayer system ensure continuous palletizer operation without frequent operator intervention. The Lantech rotating arm pallet wrapper with pre-stretch applies stretch film to finished pallets, securing loads for the long-distance road transport that characterizes American water distribution.

Energy Efficiency in Modern PET Lines

The 2019 build year means this line incorporates the latest energy management features available at the time of manufacture. The blow molder uses energy-recovery oven technology and optimized air recycling to reduce compressed air consumption per bottle. Servo-driven carousels and conveyors replace older hydraulic and pneumatic drives where possible, reducing electricity consumption and improving speed control precision. The overall energy consumption per bottle on a 2019 line is typically 15-25% lower than equivalent lines from 10 years earlier, which translates to meaningful cost savings at 70,000 BPH production rates over the equipment's operational lifetime.

Value Proposition of a Near-New Used Line

A 2019 KHS line at 70,000 BPH occupies a unique position in the used equipment market. With only a few years of service, the mechanical components are in the early portion of their service life, and the control systems are current-generation technology. The value proposition compared to ordering a new line includes immediate availability — bypassing the 12-18 month lead time for new equipment — and a price point typically 40-55% below new equipment cost. For an American water bottler needing to bring capacity online quickly, whether to capture a market opportunity or replace aging equipment, this category of near-new used line offers a combination of recent technology, documented performance, and economic value.

Frequently asked questions

What makes a 2019 KHS line different from older generations?

Key improvements include energy-recovery blow molding ovens, servo-driven carousels, improved HMI operator interfaces, and refined TriBlock transfer geometry. Overall energy consumption per bottle is typically 15-25% lower than lines from 2009-2010.

Why does a 70,000 BPH line use 96 valves instead of fewer?

Using 96 valves keeps each valve at approximately 729 cycles per hour — a moderate pace that ensures reliable filling, adequate venting time, and extended valve seal life. Fewer valves would require faster cycling that could compromise accuracy and increase maintenance.

What is the advantage of buying a near-new used line?

A line with only a few years of service offers current-generation technology at 40-55% below new equipment cost, with immediate availability instead of 12-18 month lead times for new orders. Mechanical components are in the early part of their service life.

The Critical Role of Hygiene in Still Water Bottling

Still water is among the most hygiene-sensitive products in the beverage industry. Unlike carbonated beverages where dissolved CO2 provides a degree of microbial inhibition, or hot-filled products where temperature eliminates pathogens, still water relies entirely on aseptic practices and Clean-In-Place (CIP) systems to ensure product safety. A 2008 KHS complete bottling line at 43,000 BPH (reference NP 693) provides an instructive case study in how hygiene engineering is integrated throughout a PET still water production system.

Understanding Clean-In-Place Technology

CIP systems clean and sanitize the internal surfaces of filling equipment without disassembly. In a KHS filling monoblock, CIP involves circulating a sequence of cleaning solutions — typically caustic (sodium hydroxide), acid (phosphoric or nitric acid), and sanitizer — through all product-contact surfaces including pipes, valves, bowl, and nozzles. The KHS CIP system integrated with this line automates the sequence, controlling temperatures, concentrations, and contact times to validated protocols. Between production runs, CIP cycles of 60-90 minutes ensure all biofilm and mineral deposits are removed from the 60-valve filler carousel, restoring the system to a hygienic starting condition.

Filling Monoblock Hygiene Design

The KHS Innofill-NV PET filling monoblock on this line uses gravity filling with 60 mechanical valves. From a hygiene perspective, the mechanical valve design is advantageous because it contains fewer crevices and dead zones compared to complex electronic valve assemblies. The valve body is designed for full drainage during CIP, ensuring no cleaning solution or product remains trapped after cycles. The pick-and-place cap distribution system minimizes the contact points between the capping mechanism and the closure, reducing the potential for cross-contamination. The Corvaglia 29/06 cap size is a standard still water closure with a smooth internal sealing surface that is easily inspected during quality checks.

Blow Molding and Bottle Sterility

The Blowmax 24 blow molder produces bottles from preforms using stretching and high-pressure air at temperatures exceeding 100°C. This thermal process effectively sterilizes the interior of each bottle during manufacturing, providing an inherent hygiene advantage of blow-fill systems. In the monoblock configuration, bottles transfer directly from the blower to the filler without exposure to the ambient environment, maintaining the sterility achieved during blow molding. This is a fundamental advantage over systems where pre-blown bottles are purchased, stored, and then rinsed before filling — each of those steps introduces potential contamination points.

Water Treatment Integration

While not part of the bottling line itself, the water treatment system must be designed to deliver product water meeting microbiological standards at 43,000 BPH flow rates. For still water operations in the United States, treatment typically involves multi-stage filtration, reverse osmosis (for purified water products), UV sterilization, and ozone injection. The ozone provides a residual sanitizing effect in the filled bottle, gradually dissipating to leave no taste or odor. The water treatment flow rate must exceed the filler demand by a margin sufficient to fill the product tank and maintain consistent supply during peak production — typically 15-20% above nominal filler consumption.

Downstream Hygiene Considerations

After filling and capping, hygiene concerns shift from product contamination to package integrity. The bottle inspector on this line verifies cap presence and seal integrity, ensuring no open containers proceed to secondary packaging. The PE labeller, a 2021 Simple Cut Flex CI 1120 30 with electronic cam plates and 30 stations, applies labels without contacting the cap or bottle opening area. The conveyor system between filler and downstream equipment uses drip-free designs to prevent moisture accumulation that could harbor microbial growth. Regular conveyor sanitization is a standard operating procedure that complements the CIP system on the filler.

Regulatory Framework for Water Bottling in America

Water bottling in the United States is regulated by the FDA under 21 CFR Part 165, which establishes standards of identity and quality for bottled water. Bottlers must implement Current Good Manufacturing Practices (cGMPs) including documented sanitation procedures, source water monitoring, and finished product testing. The CIP system integrated into a KHS line provides the documented, repeatable cleaning processes that regulatory compliance requires. Records of CIP cycle parameters — temperatures, chemical concentrations, flow rates, and contact times — constitute critical documentation during FDA inspections and third-party audits.

Evaluating CIP System Condition on Used Lines

When purchasing a used bottling line, the CIP system condition is a key assessment criterion. Elements to evaluate include chemical dosing pump accuracy, heat exchanger performance, valve actuation reliability, and the integrity of CIP solution tanks. On this 2008 KHS line, the CIP system has been operating for over 15 years, meaning gaskets, seals, and instrumentation may require refurbishment. However, the stainless steel vessels, piping, and spray devices typically have service lives exceeding 25 years, making the core CIP infrastructure sound on a well-maintained system. Budget for CIP instrumentation calibration and gasket replacement as part of the commissioning process for any used line.

Frequently asked questions

How often should CIP be performed on a water filling line?

CIP is typically performed at the end of each production day or between product changeovers. For still water on dedicated lines, daily CIP at the end of production is standard practice, with extended deep-cleaning CIP cycles performed weekly.

Does blow molding sterilize PET bottles?

The stretch blow molding process exposes the interior of preforms to temperatures exceeding 100°C and sterile high-pressure air, effectively eliminating microorganisms. In a monoblock configuration, this sterility is maintained through direct transfer to the filler.

What water treatment is needed for still water bottling?

Typical treatment includes multi-stage sediment filtration, activated carbon filtration, reverse osmosis (for purified water), UV sterilization, and ozone injection. The system must deliver water meeting FDA 21 CFR 165 standards at the required flow rate.

Why the Labeller Matters More Than You Think

The labelling machine is often underestimated when evaluating a bottling line. Yet it directly impacts shelf presentation, regulatory compliance, and production efficiency.

Labelling Technology Comparison

Critical Inspection Points

Inspect dispensing edges, servo motors, encoders, bottle plates, centring bells, and vision systems.

Format Flexibility Assessment

• Available change parts for different containers
• Label size range
• Number of label stations
• Multi-label capability
• Format change time and skill required

Common Issues on Used Labellers

Problems to Watch For

• Worn dispensing edges causing inconsistent application
• Dried adhesive residue in cold-glue systems
• Outdated servo drives with limited spare availability
• Missing format parts for different container sizes
• Neglected steam tunnel condition on shrink sleeve machines

Frequently asked questions

Which labelling technology is best for my product?

Self-adhesive is most versatile. Cold glue is cost-effective for high-volume glass. Hot melt OPP provides excellent wrap-around quality. Shrink sleeve offers full-body decoration.

How much does a used labelling machine cost?

Simple self-adhesive labellers start from €15,000–€40,000. High-speed rotary machines range from €60,000 to €250,000.

Can I add extra label stations?

Many rotary labeller platforms accept additional stations depending on the specific model and available carousel positions.

Gravity Filling at Industrial Scale

Gravity filling — the simplest method of transferring liquid into a container using only the force of gravity — might seem unsuited to high-speed industrial applications. Yet in the still water segment, gravity filling at 72,000 bottles per hour is not only feasible but represents a mature, established technology. A KHS Triblock line built in 2009 (reference NP 694) demonstrates how a 100-valve mechanical filler achieves this throughput while maintaining the fill accuracy and reliability that commercial water production demands. This article examines the engineering principles that make high-speed gravity filling effective for PET still water.

The Physics of Gravity Filling

In a gravity filler, product flows from a bowl or tank positioned above the fill valves into bottles positioned below. The driving force is the hydrostatic pressure created by the height difference between the product surface in the bowl and the fill point in the bottle. For water, with its low viscosity of approximately 1 centipoise at room temperature, gravity provides more than sufficient flow rate for fast filling cycles. Each valve uses a vent tube that extends to the desired fill level — when the product reaches the tube opening, air can no longer escape, and filling stops automatically. This self-regulating mechanism provides consistent fill levels without electronic sensors or flow meters.

100-Valve Filler Carousel Engineering

The 100-valve configuration on this line means each valve performs approximately 720 filling cycles per hour at rated speed. The carousel diameter required for 100 valves is substantial, typically exceeding 3 meters, which creates engineering challenges in maintaining concentricity and smooth rotation at operating speed. KHS addresses this with precision-machined carousel assemblies and hydrodynamic bearings that minimize vibration. The valve pitch — the distance between adjacent valves — must accommodate bottle diameter plus the mechanical clearance needed for reliable bottle handling on the starwheel transfers. At 100 valves, the system operates at a comfortable pace per valve while achieving aggregate high throughput.

Blow Molding: The Blowmax 36S Series IV

Feeding the filler is a KHS Blowmax 36S Series IV with 36 cavities — one of the largest configurations in the Blowmax range of that generation. At 72,000 BPH, each cavity produces 2,000 bottles per hour, matching the per-cavity rate of smaller machines. The Series IV platform introduced improved preform heating uniformity and faster oven recovery after production interruptions. The 36-cavity machine requires a high-capacity compressed air system, with the AF compressor delivering 40-bar air through a microfiltration system to prevent oil contamination of blow air — critical for food-contact applications.

Triblock Integration Architecture

The KHS Triblock concept integrates blow molder, filler, and capper onto a common base frame with direct transfer between sections. This eliminates the air conveyors that would otherwise be needed to transport empty bottles from blower to filler. For a 72,000 BPH line, air conveyors would need to handle extremely high bottle flow rates, creating noise, energy consumption, and potential bottle damage issues. The Triblock transfer uses mechanical starwheels running at synchronized speeds, providing smooth, controlled bottle handling. The compact footprint of the Triblock is a significant advantage in facilities where floor space commands premium value.

Downstream Line Configuration

The labeller uses a PE Simpl-Cut KS177 with electronic cam plates and a roll-fed station, providing precise label placement at 72,000 BPH. At this speed, electronic cam control is essential to compensate for the micro-variations in bottle positioning that become significant at high throughput. A Presco Intellispec bottle inspector performs inline quality checks before the KHS Innopack Kisters TSP shrink wrapper produces film-launch bundles. The KHS conveyor system between filler and wrapper includes accumulation capacity to buffer speed variations between primary and secondary packaging, preventing upstream stoppages from propagating to the filler.

Palletizing and Dispatch

The Alvey 942 push-type palletizer handles the high output with a push system designed for continuous layer building. At 72,000 BPH producing 24-count bundles, the palletizer processes approximately 3,000 bundles per hour — requiring rapid sweep cycles and efficient layer transfer. Pallet storage and an interlayer system ensure continuous operation without operator intervention for pallet and sheet feeding. The Lantech S1500 pallet wrapper secures loads for transport with rotating arm wrapping and pre-stretch technology.

Operating a 72,000 BPH Line in the American Market

A line of this capacity is designed for large-scale water bottlers producing 150-200 million bottles per year or more. In the American market, where regional and national water brands compete intensely on price, the per-unit production cost advantages of a 72,000 BPH line can be decisive. The 2009 build year places this equipment in a generation where mechanical reliability is documented, and any control system limitations can typically be addressed through PLC upgrades without modifying the mechanical infrastructure. For a bottler seeking to scale production without commissioning a new line, this used equipment category offers compelling economics.

Frequently asked questions

How does gravity filling achieve accuracy at 72,000 BPH?

Each of the 100 valves uses a vent tube that automatically stops filling when the product reaches the preset level. At 720 cycles per valve per hour, the pace is moderate enough for reliable mechanical operation while the large number of valves provides the aggregate speed.

What is a Triblock in PET bottling?

A Triblock integrates the blow molder, filler, and capper onto a single frame with direct mechanical transfer between sections. This eliminates air conveyors, reduces floor space, and improves bottle handling quality at high speeds.

What production volume does a 72,000 BPH line support?

Running two shifts at 80% overall equipment effectiveness, a 72,000 BPH line can produce approximately 170-200 million bottles per year, suitable for large regional or national water brands.

Why Mid-Speed PET Lines Remain Relevant

In an industry that often celebrates ever-higher production speeds, mid-speed PET bottling lines operating between 20,000 and 40,000 BPH continue to serve a vital role. A KHS complete line rated at 32,000 BPH, built in 2009 (reference NP 695), demonstrates how a well-configured mid-speed system can deliver profitable still water production for regional brands, private-label operations, and emerging bottlers. This article explores the technical configuration and economic logic behind this capacity segment.

The Blowmax 16S Series IV Blow Molder

The KHS Blowmax 16S Series IV stretch blow molder features 16 cavities, each producing approximately 2,000 bottles per hour. The Series IV generation introduced improved oven geometry and preform heating uniformity compared to earlier iterations. With 16 cavities, the machine is physically compact — a significant advantage for facilities with limited floor space. The reduced cavity count also means lower tooling investment when introducing new bottle designs, as only 16 blow mold sets are required compared to 24 or 36 in higher-speed configurations. For a bottler running two or three bottle formats, this translates to meaningful capital savings in blow mold inventory.

Gravity Filling with 50 Mechanical Valves

The filling monoblock uses 50 mechanical valves operating on gravity filling principles. At 32,000 BPH, each valve cycles approximately 640 times per hour — a moderate pace that extends valve seal life and reduces maintenance frequency compared to higher-speed operations. Gravity filling is the simplest and most reliable method for still water, using the product's own weight to flow into bottles through calibrated vent tubes. The 50-valve filler carousel is well-matched to the 16-cavity blower, avoiding the efficiency losses that occur when filler and blower capacities are significantly mismatched.

Labelling and Quality Inspection

The PE labeller is configured with a single roll-fed station using mechanical cam plates. While electronic cam plates offer greater precision at high speeds, mechanical plates are established technology that performs reliably at 32,000 BPH with lower maintenance costs and simpler troubleshooting. The bottle inspector downstream checks fill level and cap presence, ensuring product quality before secondary packaging. For a mid-speed line, the inspection system does not require the same high-speed camera refresh rates as faster lines, allowing the use of cost-effective inspection solutions without compromising detection accuracy.

Secondary Packaging: Film-Launch Shrink Wrapping

The shrink wrapper operates in film-launch mode, producing 6×4 bundles. At 32,000 BPH producing 24-count bundles, the wrapper handles approximately 1,333 bundles per hour — a manageable pace that allows for reliable film sealing and consistent shrink quality. The film-launch configuration uses the forward motion of bundles to wrap film around the group, followed by a heat tunnel for shrink. This is the most material-efficient wrapping method, using only a single sheet of film per bundle with minimal trim waste.

Push-Type Palletizing and Pallet Wrapping

The Alvey 881 push-type palletizer represents proven, mechanically simple technology for layer building. Push palletizers use sweep arms and guide rails to assemble rows of bundles into complete layers before lowering them onto the pallet. While less flexible than robotic systems for pattern changes, push palletizers are extremely reliable, with fewer electronic components to maintain. The Lantech S1500 rotating arm wrapper applies stretch film with pre-stretch, securing loads for transport. This end-of-line combination prioritizes reliability and low operating cost over high-speed flexibility — appropriate for a dedicated still water operation running a limited number of SKUs.

Utility Requirements and Operating Costs

A 32,000 BPH PET line consumes significantly less energy, compressed air, and cooling water than higher-speed counterparts. The 16-cavity blow molder requires a smaller compressor, reducing both capital and energy costs. Chiller capacity scales with blow molder output, further reducing utility requirements. For American bottlers, where electricity costs vary significantly by region, the lower utility footprint of a mid-speed line can meaningfully improve per-unit economics, particularly in regions with higher energy costs. Labor requirements are similar to faster lines — typically two to three operators per shift — making the per-unit labor cost higher than high-speed lines but offset by lower capital and utility costs.

Investment Logic for Regional Water Brands

A used 2009 KHS line at 32,000 BPH represents one of the most accessible entry points to professional PET water bottling. The equipment is long-established, parts remain available through KHS and the aftermarket, and the technology is well understood by trained operators. For a regional brand producing 50-100 million bottles per year, this line provides sufficient capacity running two to three shifts. The lower capital requirement compared to a 50,000+ BPH line allows bottlers to allocate more resources to water source development, brand building, and distribution — often the true determinants of commercial success in the competitive American water market.

Frequently asked questions

What is the ideal production volume for a 32,000 BPH line?

Running two shifts per day, five days per week, a 32,000 BPH line can produce approximately 75-85 million bottles per year, accounting for normal efficiency and changeover time. This suits regional brands and private-label operations.

Are mechanical cam plates a disadvantage on labellers?

At speeds below 40,000 BPH, mechanical cam plates perform reliably and are simpler to maintain than electronic versions. The cost advantage and ease of troubleshooting often outweigh the precision benefits of electronic systems at these speeds.

Why choose a push-type palletizer over robotic?

Push-type palletizers are mechanically simpler, less expensive to maintain, and extremely reliable for operations running a single pallet pattern. They are the logical choice for dedicated lines with limited SKU variety.

The Used Bottling Equipment Market Landscape

The global bottling and packaging equipment market includes hundreds of manufacturers ranging from large multinational groups to specialised regional producers.

Market Segments and Specialisations

Bottling equipment manufacturers generally fall into several distinct categories based on their scope and specialisation.

Full-Line Suppliers

A small number of manufacturers offer complete bottling line solutions covering most or all production stages.

Segment Specialists

Many manufacturers specialise in specific equipment categories, often achieving exceptional performance within their niche.

Regional Manufacturers

Italy, Germany, France, and China are the primary manufacturing hubs for bottling equipment.

Evaluating Equipment from Different Manufacturers

When comparing used equipment from different manufacturers, consider objective evaluation criteria including spare parts ecosystem, control system platforms, and build quality indicators.

Frequently asked questions

How should buyers compare manufacturers of used bottling equipment??

There is no single best manufacturer. The right choice depends on your specific application, capacity requirements, budget, and local service availability.

Are Italian or German bottling machines better?

Both countries have long traditions of engineering excellence. Quality of individual machines matters far more than country of origin.

How do I find spare parts for older equipment?

Start with the current manufacturer or their successor company. Specialised aftermarket suppliers can often provide compatible components.

Does BottlingScout represent any manufacturer?

No. BottlingScout is an independent used machinery marketplace not affiliated with any equipment manufacturer.

The Evolution of End-of-Line Automation in Water Bottling

End-of-line packaging has undergone a transformation in high-speed PET water bottling. Where conventional push-type palletizers once dominated, robotic systems now offer flexibility, speed, and reduced mechanical complexity. A 2016 KHS complete PET line rated at 54,000 BPH (reference NP 696) illustrates this shift, featuring a dual robotic arm palletizer that handles clamp and lift operations for building stable, transport-ready pallet loads. This article examines the technical rationale behind robotic palletizing in the context of a full still water production line.

The KHS InnoPET BlowFill Monoblock

The core of this line is the KHS InnoPET BlowFill monoblock, integrating blow molding, filling, and capping into a single machine frame. The monoblock approach eliminates bottle transfer conveyors between the blower and filler, reducing the risk of contamination and bottle damage. For still water, the filling section operates on gravity principles with pre-threaded plastic closures applied via pick-and-place distribution. The 2016 build benefits from improved energy management in the blow section and updated control interfaces compared to earlier BlowFill generations.

Labelling Configuration and Flexibility

The labelling section features two stations equipped with roll-fed PE modules, providing redundancy and the ability to run different label designs simultaneously. The counterclockwise rotation and electronic cam plate control enable precise label placement at full production speed. Having two active stations means that label roll changes can be performed on one station while the other continues production, virtually eliminating downtime for consumable changes. This configuration is particularly valuable for contract bottlers serving multiple brands on the same line.

Shrink Wrapping: The Innopack Kisters SP

The KHS Innopack Kisters SP shrink wrapper handles secondary packaging using a film-launch system across six lanes. Producing 6×4 bundles in film-only mode, this machine prioritizes material efficiency — no corrugated trays are required, reducing both packaging cost and the supply chain complexity for tray procurement. The SP model features a continuous-motion tunnel design that provides uniform heat distribution, preventing film distortion and ensuring tight, professional bundle appearance. For the American retail market, where shrink-wrapped bundles are the standard format for multipacks of water, this configuration meets all major retailer specifications.

Dual Robotic Arm Palletizing

The standout feature of this line is the KHS dual robotic arm palletizer using clamp-and-lift technology. Unlike traditional push-type or sweep-type palletizers that use mechanical rails to position layers, robotic arms offer programmable flexibility for different pallet patterns without mechanical changeover. The dual-arm configuration allows one arm to build layers while the other places interlayer sheets, maintaining continuous throughput. Clamp gripping is ideal for shrink-wrapped bundles, applying controlled pressure to grip packages without crushing. The system can handle pattern changes via software, making it straightforward to switch between different bundle configurations or pallet sizes without stopping production.

Pallet Wrapping and Load Stability

After palletizing, loads pass through a KHS rotating arm pallet wrapper with pre-stretch capability. The rotating arm design wraps film around a stationary pallet, which is essential for unstable or heavy loads that cannot safely rotate on a turntable. Pre-stretch technology elongates the film before application, reducing material consumption by 200-300% compared to non-stretched film while increasing load containment force. For still water pallets, which are among the heaviest FMCG loads per pallet, proper wrapping tension is critical to prevent load shifts during transit across the continental United States.

Line Integration and Control Architecture

A complete line of this scope requires sophisticated integration between all machine sections. The KHS platform uses a centralized line management system that monitors speeds, buffer levels, and fault states across all machines. When the filler reduces speed due to a downstream backup, the blow molder automatically adjusts output to prevent preform waste. Similarly, the shrink wrapper and palletizer communicate to manage accumulation between secondary and tertiary packaging. This closed-loop control minimizes product waste, reduces energy consumption during partial-speed operation, and provides operators with a single interface for the entire line.

Market Position of 2016 KHS Lines

A 2016 KHS line at 54,000 BPH represents a sweet spot in the used equipment market for American water bottlers. The line is recent enough to benefit from modern controls, energy-efficient components, and readily available spare parts, while the price point of a used installation is substantially below that of new equipment. The dual robotic palletizer is a premium feature that adds significant value for operators planning to run multiple SKUs or bundle formats. For regional bottlers or private-label producers seeking to enter or expand in the still water market, this class of equipment provides industrial-grade reliability with a proven track record.

Frequently asked questions

What are the advantages of robotic palletizing over conventional systems?

Robotic palletizers offer programmable pattern changes via software without mechanical changeover, handle multiple product formats with the same hardware, and typically require less maintenance than complex mechanical palletizers with chains and pushers.

Why use a rotating arm pallet wrapper instead of a turntable?

Rotating arm wrappers keep the pallet stationary, which is safer and more stable for heavy loads like water pallets. This prevents the risk of load collapse that can occur when heavy pallets rotate on a turntable.

What is the benefit of film-only shrink wrapping?

Film-only bundles eliminate the cost and logistics of corrugated trays while still providing adequate bundle integrity. This is the standard format for water multipacks in American retail.

The Filler: Heart of Every Bottling Line

The filling machine is the most critical and often the most expensive component of any bottling line. It directly determines line speed, product quality, and operational efficiency.

Filling Valve Architecture: Mechanical vs Electronic

Understanding the valve type is fundamental to evaluating a used filler.

Critical Mechanical Inspection Points

Remove several filling valves from the carousel and inspect valve seats, seals, and valve bodies.

CIP System Evaluation

• CIP cup condition for each valve
• Return circuit flow verification
• Temperature capability confirmation
• Spray ball coverage in tank-equipped fillers
• Valve actuation during CIP cycles

Control System Assessment

• PLC platform identification
• HMI generation and software compatibility
• Servo drive condition and error logs
• Sensor inventory verification
• Network architecture assessment

Performance Verification

Filler Performance Checklist

• Actual filling speed measurement over 30+ minutes
• Fill level consistency across valve positions
• Valve-to-valve variation analysis
• Changeover time observation
• Foaming behaviour for carbonated products
• Drip/spill frequency monitoring
• CIP cycle execution observation
• Reject rate monitoring
• Noise and vibration assessment

Frequently asked questions

How do I determine the actual condition of a filling valve?

Remove 3–5 valves from different positions on the carousel. Inspect seals for compression set, valve seats for scoring, and check spring tension on mechanical valves.

Can a mechanical filler be converted to electronic filling?

Yes, many filler platforms support valve conversion. Costs range from €30,000 to €150,000 depending on the number of filling heads.

What is the most expensive repair on a used filler?

Main bearing replacement is typically the most expensive, ranging from €15,000 to €60,000 depending on machine size.

What fill accuracy should I expect from a used machine?

A well-maintained mechanical filler should achieve ±2–5 ml accuracy. Electronic flow-meter fillers should achieve ±0.5–1 ml.

Why Consider a Used Bottling Line?

Acquiring a used bottling line offers significant advantages for beverage producers and co-packers looking to enter new markets, expand capacity, or upgrade existing operations without the capital outlay required for brand-new equipment.

Defining Your Requirements

Before evaluating any equipment, clearly define your production requirements. These parameters will narrow the search and prevent costly mismatches.

• Target output capacity (bottles per hour) and expected production shifts per day
• Container type and format range: PET, glass, can, or multi-format capability
• Product characteristics: still water, carbonated beverages, hot-fill juices, dairy, or sensitive products
• Available floor space including access for installation and future maintenance
• Utility infrastructure: electrical supply, compressed air capacity, water quality
• Budget envelope including transport, rigging, installation, commissioning, and potential retrofit costs

Understanding Line Composition

A complete bottling line typically includes the following stages. Each machine must be evaluated independently, but also as part of an integrated system.

Mechanical Evaluation Criteria

The mechanical condition of used equipment determines both its remaining service life and the cost of bringing it to full operational standard.

Control Systems and Automation

The PLC and automation architecture significantly impacts the long-term usability and upgrade potential of used equipment.

The Inspection Process

Pre-Purchase Inspection Checklist

• Request a full production trial run under realistic conditions
• Verify actual production speed against stated capacity
• Inspect all safety devices and emergency stop circuits
• Check electrical cabinet condition
• Review maintenance logs
• Document all format parts and tooling included
• Verify PLC source code availability
• Assess pneumatic and hydraulic circuits
• Check for structural damage
• Request technical manuals and schematics

Frequently asked questions

How much does a used bottling line cost?

Pricing varies enormously depending on capacity, condition, age, and completeness. Small-format lines (2,000–5,000 BPH) may start from €50,000–€150,000, while high-speed lines (20,000+ BPH) can range from €300,000 to over €1,000,000.

What is the typical lifespan of a used bottling line?

Well-maintained bottling equipment from established manufacturers can operate for 25–35 years.

Should I buy individual machines or a complete line?

Complete lines offer factory integration. Assembling from individual machines can be cost-effective with experienced integrators.

How long does it take to install a used bottling line?

Typical installation timelines range from 4–8 weeks for a simple line to 12–16 weeks for complex high-speed lines.

What documentation should come with a used machine?

Essential documentation includes: technical manuals, electrical schematics, PLC source code, spare parts lists, CE declaration, maintenance records, and format part inventories.

Introduction to High-Speed PET Blow-Fill Technology

The integration of blow molding and filling into a single monoblock system represents one of the most significant advancements in PET still water bottling. The KHS InnoPET BloFill concept, as seen in a 54,000 BPH line manufactured in 2014 (reference NP 697), exemplifies how combining these two critical processes reduces floor space, eliminates air conveyors between blower and filler, and minimizes contamination risks. In the still water segment, where product purity is paramount, this integrated approach has become the standard for medium-to-high-speed operations across the American market.

Blow Molding: The Blowmax 24S Platform

At the heart of this line sits the KHS Blowmax 24S stretch blow molder with 24 cavities, designed to produce PET bottles at speeds exceeding 2,200 bottles per cavity per hour. The Series platform uses infrared oven heating with individual lamp control per preform zone, allowing precise thermal profiling for different bottle geometries. For still water applications, wall thickness distribution is optimized to minimize material usage while maintaining top-load strength for palletized storage. The 24-cavity configuration provides sufficient redundancy that individual cavity maintenance can be performed without halting production entirely.

Mechanical Filling Technology for Still Water

The filler section employs 72 mechanical filling valves operating on a gravity principle. Mechanical valves remain a preferred choice for still water because they offer excellent fill accuracy without the complexity and cost of electronic flow meters. Each valve uses a calibrated vent tube to control fill level, delivering consistent volumes across the entire carousel. The absence of CO2 in still water eliminates the need for counter-pressure filling, allowing simpler valve construction and faster filling cycles. The 72-valve configuration at 54,000 BPH translates to approximately 750 fills per valve per hour — well within the documented operating envelope for mechanical technology.

Capping and Closure Integrity

The integrated capper handles pre-threaded plastic closures using a pick-and-place distribution system. This method ensures precise cap placement on the bottle finish before the capping heads apply torque. The Gebo CF 2024 cap elevator feeds oriented closures to the distribution system at rates exceeding the filler output, providing a buffer against minor feeding interruptions. For still water, closure integrity is critical not for pressure retention but for tamper evidence and shelf-life protection. The capping torque is calibrated to ensure consumer-friendly opening while maintaining seal performance through distribution.

Labelling and Inspection Systems

Downstream labelling is performed by a PE labeller using roll-fed technology on a single station. The Simpl-Cut Flex 1420-45 model, manufactured in 2021, represents a newer addition to this line — a common practice where labelling technology is upgraded independently of the core blow-fill block. The roll-fed system applies pre-printed labels using hot-melt adhesive, offering lower label costs per unit compared to pressure-sensitive alternatives. A PRESSCO Series V inline inspector verifies fill level, cap presence, cap torque, and label placement, rejecting non-conforming bottles before they reach secondary packaging.

Secondary Packaging and Palletizing

The shrink wrapper, a KHS Innopack Kisters TSP, operates in film-launch mode producing 6×4 bundles using heat-shrink film without trays. This configuration minimizes packaging material cost while providing adequate bundle integrity for palletized loads. The six-lane infeed matches the filler output without requiring accumulation tables. Downstream, the KHS Innpal PBL 1 N(H) RG 1 palletizer uses clamp-type layer forming, building stable pallet patterns with interlayer sheets. The Lantech SLC-AUTO pallet wrapper applies stretch film using a rotating arm with pre-stretch, securing loads for long-distance transport across the American distribution network.

Operational Considerations for the US Market

Operating a 54,000 BPH still water line in the United States involves specific considerations around FDA compliance, state-level water quality regulations, and utility costs. The KHS platform is designed to integrate with Clean-In-Place systems, and the blow-fill monoblock arrangement minimizes open-air exposure of bottles between forming and filling. Energy consumption is dominated by the blow molder compressor and oven sections, where the AF compressor model provides high-pressure air at 40 bar with energy recovery capabilities. Water treatment upstream of the filler — typically reverse osmosis followed by UV and ozone — must match the line speed to avoid production bottlenecks.

Evaluating a Used Blow-Fill Line

When assessing a used KHS InnoPET BloFill system of this vintage and capacity, key inspection points include blow mold condition, oven lamp hours, valve seal wear on the filler, and the overall state of the air compressor. The 2014 build year places this line within the generation that benefits from improved PLC integration and diagnostic capabilities compared to earlier KHS platforms. The upgraded 2021 labeller indicates the line has been actively maintained and modernized, which is a positive indicator of overall equipment care. At 54,000 BPH, this configuration serves mid-tier water brands or regional bottlers seeking established, reliable technology without the investment in a new installation.

Frequently asked questions

What is a blow-fill monoblock in PET bottling?

A blow-fill monoblock combines the stretch blow molder and filler into a single integrated machine, eliminating the need for air conveyors between the two processes. This reduces contamination risk and saves floor space.

Why are mechanical filling valves used for still water?

Mechanical valves are simpler, more cost-effective, and highly reliable for non-carbonated products. Since still water does not require counter-pressure filling, gravity-fed mechanical valves deliver excellent accuracy with lower maintenance requirements.

What should be inspected on a used KHS PET line?

Key inspection areas include blow mold wear, oven lamp hours, filler valve seal condition, compressor maintenance history, and the overall PLC and controls system state. Evidence of component upgrades, like a newer labeller, indicates active maintenance.