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Table of Content
What Is the Hualian Automatic Open Mouth Bag Placer Machine?
Technical Specifications at a Glance
Key Features for Safe Pet Food Packaging
Preventing Contamination in Pet Food Packaging
Efficiency and Automation in Pet Food Packaging
User-Friendly Operation with Hualian Technology
Food Safety Compliance and Industry Standards
Integration into Complete Automated Packaging Lines
The Hualian Automatic Open Mouth Bag Placer Machine ZSG-1000G + FBK-332C is a fully automated bagging system purpose-built for large-format packaging in demanding industrial environments.
For pet food manufacturers, it represents one of the most complete and capable solutions available for filling and sealing heavy bags of dry kibble, animal feed, and related granular or powdered products at high volume and with consistent, verifiable accuracy.
Pet food packaging presents a specific set of requirements that not every industrial bagging system is designed to meet. At the same time, food safety and hygiene standards in the pet food sector have never been more demanding.
Contamination prevention, traceability, and compliance with industry regulations are not optional, and they are commercial and legal requirements that packaging equipment must actively support. A machine that compromises on hygiene or produces inconsistent seals is a liability, not an asset.
This article examines the ZSG-1000G + FBK-332C in detail: what the system is, how it works, why its design choices make it specifically well-suited to pet food packaging, and how it integrates into a complete automated production line. Every specification cited is drawn directly from Hualian Machinery's published product documentation.
The Hualian Automatic Open Mouth Bag Placer Machine ZSG-1000G + FBK-332C is not a single machine but a combined system consisting of two specialized units that work in sequence to deliver a complete, automated bagging solution. Understanding what each component does and how they work together is essential context for evaluating the system's capabilities.
The ZSG-1000G is a high-speed automatic bag feeding and placement machine. It takes empty bags from a pre-loaded stack and, through a fully automated mechanical sequence, picks each bag individually, opens the bag mouth, and positions the opened bag correctly over the filling spout of an attached weighing or filling system.
The ZSG-1000G uses four independent servo motors, dedicated to bag taking, bag opening, hopper lifting, and bag feeding, respectively. With these motors, it’s able to control each stage of this process with precision. The four-servo architecture is what enables the machine's combination of high speed and positional accuracy: each stage is independently powered and controlled, so the overall process is not limited by the slowest mechanical component.
Once the bag has been filled, it is conveyed to the FBK-332C, which handles the complete bag-closing sequence.
This system automatically performs dust removal (optional), trimming of the bag mouth, stitching with thread, application and cutting of paper tape, heat sealing, press closing, and cycle counting; all in a single continuous pass. The FBK-332C is Hualian's own proprietary development, produced with full intellectual property rights, and is compatible with a wide range of bag types, including multi-layer paper bags, paper-PE composite bags, aluminum-PE inner liner bags, and standard PE bags.
Together, the ZSG-1000G + FBK-332C is deployed across a range of industrial packaging applications that share a common profile: heavy bags, granular or powdered products, and high-volume production requirements.
A few of the system’s applications include:
Pet food and animal feed
Grain and rice
Plastic pellets and granules
Chemical raw materials
Pharmaceutical raw materials and powdered products
The common thread across these applications is the 20–50 kg bag weight range, the need for reliable, contamination-controlled closure, and production volumes that make manual packaging economically impractical.
For reference, the following are the verified published specifications for both components of the system.
Voltage: 3-phase AC 380V/50Hz
Rated capacity: 800–1,000 bags per hour
Total power: 13 kW
Air supply pressure: 0.4–0.6 MPa
Air extraction speed: 22.5 m³/h
Fill weight range: 20–50 kg per bag
Voltage: AC 380V/50Hz
Gross power: 6.5 kW
Transmission power: 0.75 kW
Sewing machine motor power: 0.37 kW
Heating power: 0.5 kW × 10 elements
Sealing speed: 8.5 m/min standard (customizable to 11 m/min)
Temperature range: 0–400°C
Air source pressure: 0.6 MPa
Sealing center height: 750–1,450 mm (adjustable)
Minimum bag top clearance: 180 mm
External dimensions (L × W × H): 3,030 × 950 × 1,800 mm
Net weight: 600 kg
Compatible bag types: Multi-layer paper bags, paper-PE composite bags, 2-in-1 and 3-in-1 bags, aluminum-PE inner liner bags, PE bags
Food safety in pet food packaging is a function of both what the machine keeps out of the product and how reliably it closes the bag. The ZSG-1000G + FBK-332C addresses both dimensions through its sealing technology, material compatibility, and hygienic design.
The FBK-332C bag closing system applies a multi-stage closure that combines industrial stitching with heat sealing and paper tape application. This combination produces a bag mouth that is not simply closed but structurally reinforced at multiple points.
The stitched seam provides mechanical strength; the heat-sealed paper tape over the stitching adds a moisture and dust barrier; and the press closing stage ensures firm, uniform contact across the seal area.
The FBK-332C sealing system operates across a temperature range of 0 to 400°C, with a sealing speed of 8.5 m/min (customizable up to 11 m/min) and an air source pressure of 0.6 MPa. These parameters provide sufficient flexibility to achieve a proper seal across the range of bag materials used in commercial pet food packaging, from lightweight PE inner liners to thick multi-layer composite structures.
Moisture ingress is one of the primary causes of quality loss in dry pet food. Kibble that absorbs ambient humidity softens, loses its crunch, and becomes hospitable to mold growth well before its labeled best-before date. The moisture-resistant closure produced by the FBK-332C's combined stitching and heat-sealing process directly addresses this risk by creating a bag mouth that does not allow moisture transmission through the closure point.
Dust contamination control is addressed both at the sealing stage and optionally at the pre-seal stage. The FBK-332C is available in DC variants (FBK-332C being the dust-collection configuration) that include an integrated dedusting mechanism before the seal is applied. This removes the product dust that accumulates at the bag mouth during filling.
Pet food manufacturers use a variety of bag materials depending on their product positioning, distribution requirements, and sustainability commitments. The ZSG-1000G + FBK-332C is confirmed compatible with the full range of materials currently in commercial use for heavy-format pet food bags:
PE plastic bags: Standard polyethylene bags used for bulk pet food, valued for their moisture resistance and cost-effectiveness.
Woven polypropylene (PP) bags: High-strength woven bags used for bulk and agricultural-grade product formats, where structural integrity under heavy loads is the primary requirement.
Multi-layer kraft paper bags: Paper bags with two or more layers, offering a natural aesthetic suitable for premium or organic pet food brands combined with the structural strength of multiple plies.
Paper-plastic composite bags: 2-in-1 and 3-in-1 laminated structures that combine the printability and structural properties of paper with the barrier and sealing performance of plastic film inner liners.
Aluminum-PE inner liner bags: Premium composite bags with a foil barrier layer for maximum oxygen and moisture protection, used for specialty pet foods where extended shelf life without preservatives is a product differentiator.
This breadth of material compatibility means a manufacturer can use the same ZSG-1000G + FBK-332C system across different product lines and packaging formats without investing in separate machinery for each bag type.
Contamination prevention in food packaging encompasses both product contamination and cross-contamination between production runs. The ZSG-1000G + FBK-332C addresses both through its automated bag handling, optional dedusting capability, and design approach to hygienic operation.
Product dust is an inherent byproduct of filling granular pet food at volume. As kibble falls into the bag at filling speeds, fine particles become airborne and settle on the bag mouth's inner surfaces. If this dust is not removed before the seal is applied, it becomes trapped between the seal surfaces, reducing bond strength and creating microscopic pathways through which air and moisture can migrate.
The integrated dedusting function in the DC-series FBK-332C removes accumulated dust from the bag mouth area before the stitching and heat-sealing steps are applied. The result is a cleaner, more structurally sound seal on every bag and a reduction in the seal failure rate that directly supports both product quality and hygiene compliance.
The ZSG-1000G picks empty bags from the stack using vacuum suction cups rather than mechanical grippers or manual operator handling. This contactless approach means that the interior of the bag is not touched by any mechanical component during the picking, opening, or positioning stages. As you can imagine, this is a meaningful hygiene advantage over manual bag handling, where operator contact with bag interiors is unavoidable and represents a direct contamination pathway.
The bag mouth is opened using a directed air jet, again without mechanical contact. Once opened and positioned over the filling spout, the only contact the bag has with the machine is at the outer surfaces of the bag mouth; never at the interior surfaces that will be in contact with the product. This design principle reduces the number of surfaces that must be cleaned between production runs and minimizes the risk of cross-contamination when switching between different products on the same line.
The ZSG-1000G is fully assembled and tested before shipment, with a design emphasis on convenient maintenance and simple operation. The machine's PLC control system includes automatic fault identification, which surfaces operational issues before they develop into contamination risks or extended downtime.
When a fault is flagged, operators can address it promptly rather than discovering the problem downstream.The bag-in-place detection sensor system is also directly relevant to contamination control. By confirming that each bag is correctly positioned before filling begins, the system prevents product from being dispensed outside a bag. Every prevented misfill is a prevented contamination event.
Operational efficiency is as important as food safety for commercial pet food manufacturers. A machine that produces safe, well-sealed bags but does so slowly, with frequent stoppages, or with high labor requirements does not deliver the economic performance that justifies the investment. The ZSG-1000G + FBK-332C is designed to excel on this dimension as well as on hygiene and quality.
The ZSG-1000G achieves a rated capacity of 800 to 1,000 bags per hour. This figure reflects the machine's four-servo-motor architecture, which eliminates the mechanical inefficiencies inherent in single-drive systems by powering each stage of the bag-handling process independently.
Bag taking, opening, hopper lifting, and feeding each occur at the optimal speed for that stage without being constrained by the mechanical limits of a shared drivetrain.
At 1,000 bags per hour, a single ZSG-1000G + FBK-332C line processing 25 kg bags would package up to 25,000 kg of pet food per hour. For bulk dry pet food manufacturers operating multiple-shift production schedules, this throughput capacity represents a significant commercial advantage over lower-speed or manually assisted alternatives.
The FBK-332C complements this throughput with a sealing speed of 8.5 m/min as standard, although it’s customizable to 11 m/min for operations where the sealing stage would otherwise become the throughput bottleneck. With a height from sealing center to floor adjustable between 750 and 1,450 mm, the sealing unit can also be configured for different conveyor heights without major mechanical modification.
Pet food brands typically produce multiple SKUs; different bag weights, different bag dimensions, sometimes different bag materials; on the same production line. Changeover time between formats directly affects usable production hours. The ZSG-1000G is specifically noted by Hualian as offering fast adjustment to different bag specifications without the need for tools.
This tool-free changeover capability reduces the time required to switch between bag sizes from the hours that mechanical changeovers can require on less flexible equipment, to a fraction of that.
The system is designed for bags weighing 20 to 50 kg, covering the full range of bulk and semi-bulk formats used in commercial pet food: from the 20 kg bags common in mid-range retail formats to the 50 kg sacks used in agricultural, veterinary, and wholesale supply.
Manual bag placement on a high-volume packaging line requires dedicated operators performing repetitive physical tasks at pace; opening bags, positioning them on filling spouts, and conveying them to the sealing station. This work is labor-intensive, physically demanding, and introduces the human variability that automated systems are specifically designed to eliminate. The ZSG-1000G automates the entire bag placement and positioning sequence, removing the need for a bag-placement operator entirely.
When the FBK-332C is added to close and seal bags automatically, the combined system performs the full bagging sequence without requiring an operator at either the bag placement station or the sealing station. Labor can be redirected to higher-value tasks such as quality oversight, line monitoring, and secondary packaging operations.
Advanced automation is only operationally valuable if the people responsible for running and maintaining the equipment can do so without specialized expertise or prolonged training. Hualian has designed the ZSG-1000G + FBK-332C with this in mind, incorporating features that simplify day-to-day operation and maintenance without compromising the system's technical capabilities.
The entire system is PLC-controlled, with the programmable logic controller managing the sequencing of all bag-handling, filling, and sealing operations automatically once the system parameters have been set. Operators are not required to manually coordinate the timing between the bag placer and the sealing unit, since the PLC handles this synchronization continuously and reliably.
Automatic fault identification is built into the control system. When a fault condition is detected, the system flags it immediately, allowing operators to address it without diagnostic delay. This self-diagnostic capability reduces the technical skill required to maintain the line at operational readiness and shortens the mean time to resolution when issues do arise.
The FBK-332C has external dimensions of 3,030 × 950 × 1,800 mm and a net weight of 600 kg, with the sealing center height adjustable from 750 to 1,450 mm. This adjustability allows the machine to be configured for different conveyor and line heights during installation without structural modification, simplifying integration into existing production facilities. The ZSG-1000G operates on a 3-phase AC 380V/50Hz power supply with a total power draw of 13 kW and requires an air supply pressure of 0.4–0.6 MPa.
Pet food manufacturers operate under an increasingly stringent regulatory environment. Food safety standards, traceability requirements, and packaging material regulations all impose obligations on the equipment used in the packaging process. The ZSG-1000G + FBK-332C supports compliance across several of these dimensions.
Hualian Machinery is an established manufacturer with products that are fully assembled and tested before shipment, reflecting a quality management approach aligned with the expectations of food industry customers. The FBK-332C's bag counting function supports basic lot traceability by providing a record of production output that can be correlated with filling records and quality inspection data.
For manufacturers operating under HACCP-based food safety management systems, the bag detection and misfill prevention features of the ZSG-1000G address a documented critical control point; the risk that product is dispensed outside a correctly positioned bag, contaminating the production environment and requiring a cleanup intervention that disrupts the hygiene status of the line. By automating detection and prevention of this failure mode, the machine supports the preventive control requirements of HACCP implementation.
The pet food industry is subject to food safety regulations in most major markets that require manufacturers to demonstrate control over their production and packaging processes.
In the European Union, pet food is regulated under feed hygiene legislation that imposes facility and equipment standards comparable to those applied to human food. In the United States, FDA regulations under FSMA (the Food Safety Modernization Act) require preventive controls for animal food manufacturing.
The automation, contamination prevention features, and closed handling design of the ZSG-1000G + FBK-332C are consistent with the equipment control requirements that these regulatory frameworks impose.
The ZSG-1000G + FBK-332C is explicitly designed to function not as a standalone unit but as a component within a fully integrated automated packaging line. This is a critical capability for commercial pet food manufacturers, whose production operations require coordinated automated systems from filling through to finished pallet; not a collection of isolated machines requiring manual product transfer between stages.
According to Hualian's product documentation, the system integrates directly with conveyor systems for bag transport between stations, automatic weighing and filling systems upstream of the bag placer, palletizing machines that receive the sealed bags and build pallet loads automatically, and wrapping and strapping equipment for finished pallet preparation. The PLC control architecture of the ZSG-1000G is designed to synchronize with upstream and downstream equipment, allowing the full line to operate as a coordinated unit under central control rather than as a series of manually coordinated steps.
This integration capability is particularly valuable in pet food manufacturing, where production lines are often expected to run continuously across multiple shifts. A line that requires human coordination between its bag placing, filling, sealing, and palletizing stages introduces labor dependency and variability at exactly the points where automation delivers the most benefit. The ZSG-1000G + FBK-332C removes those dependencies by communicating and synchronizing with the other machines in the line automatically.
For manufacturers producing bulk dry pet food, animal feed, or related granular products in the 20–50 kg bag range, the Hualian Automatic Open Mouth Bag Placer Machine ZSG-1000G + FBK-332C represents a comprehensively capable solution that is built and proven for the demands of commercial food production at scale.
To learn more about the ZSG-1000G + FBK-332C, request a quotation, or discuss how this system can be configured for your specific production line, visit the product page at hualianmachinery.com or contact the Hualian Machinery team directly.
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