External Vacuum Sealing Machine

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Introduction

The external vacuum sealer is a highly efficient packaging machine that integrates multiple functions, including vacuuming, sealing, and gas flushing. It utilizes a PLC (Programmable Logic Controller) as its core control system, ensuring stable and precise operation of the entire machine.

Unlike internal vacuum sealing machines, its vacuum unit is located outside the packaging container, eliminating the need to place items inside a sealed chamber. This allows for flexible adaptation to packaging items of various shapes and sizes, making it particularly suitable for packaging large or irregularly shaped items. If you have a need for a vacuum sealer, please contact us for product details and pricing.

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Working Principle

The operating principle of an external vacuum sealer is simple and efficient. The core process consists of two stages: vacuum extraction and sealing:

Vacuum Extraction Stage: After placing the items to be packaged into the bag, position the bag opening in the machine’s sealing area. Upon activation, the vacuum pump rapidly extracts air from inside the bag through the suction tube. This process typically completes within 2 to 3 seconds, creating a pre-set negative pressure environment inside the bag. This effectively removes oxygen, inhibits microbial growth, and prevents oxidation of the contents.
Sealing Stage: Once the vacuum level reaches the preset value, the system automatically stops the suction process. At this point, the heat sealing bar applies heat and pressure to the bag opening. The sponge-like silicone strip used in the equipment ensures that the bag opening maintains a secure seal after evacuation. The heat-sealed opening is flat, sturdy, and aesthetically pleasing, effectively preventing the ingress of external air and moisture.

Additionally, the equipment supports a gas-flushing function, which allows for the injection of protective gases such as nitrogen or carbon dioxide into the bag after vacuuming. This provides cushioning protection for fragile or pressure-sensitive products and further extends the shelf life of food items.

Technical parameters

Model	WZ-600	WZ-800	WZ-1000
Packaging Capacity (bag/min)	3-10	3-10	3-10
Maximum Sealing Size (mm)	600×8	800×8	1000×8
Maximum Packaging Size (mm)	600×600	800×800	1000×1000
Power Supply/Power Consumption	110/220V, 50/60HZ, 0.9KW
Vacuuming Rate	20m³/h	20m³/h	20m³/h
Inflation Rate	0.8Mpa	0.8Mpa	0.8Mpa
Dimensions (mm)	L670×W460×H1020	L870×W460×H1020	L1070×W460×H1020
Net Weight (KG)	85KG	95KG	105KG

Product Structure and Composition

High-End Oil-Water Separator: Effectively filters moisture and impurities from compressed air, protecting the internal components of the vacuum pump, ensuring smooth operation, and maintaining strong and stable suction.
Stainless Steel Workbench: Constructed from corrosion-resistant 304 stainless steel, the work surface height can be flexibly adjusted via multiple locking positions to accommodate the thickness of packaged items, meeting the packaging needs of products of various sizes.
High-Quality Sealing Strip: Features a high-quality heat-activated silicone strip that heats up quickly and evenly, ensuring a strong, secure seal with a smooth and neat finish.
Pressure Gauge: Displays the vacuum level inside the bag and the operating pressure of the equipment in real time, allowing operators to intuitively monitor the packaging status and precisely adjust vacuum parameters according to the packaging requirements of different materials.
Intelligent Control Panel: Equipped with a high-quality chip, all operating data is clearly visible. Featuring one-touch operation and a simple interface, it makes parameter settings and mode switching more convenient.
Emergency Stop Switch: Equipped with an automatic shutdown mechanism, it can quickly cut off the power supply in emergencies to ensure the safety of both operators and the equipment.
Foot Switch: Combined with a one-touch automatic control mode, this feature frees up both hands, allowing operators to start and stop vacuuming and sealing operations using the foot switch.
Mobility and Storage: Equipped with swivel casters on the bottom for easy relocation to any workstation; a convenient storage compartment is located beneath the machine for storing vacuum bags or commonly used spare parts.

1.Oil-water separator; 2.Workbench; 3.Pressure gauge; 4.Heating silicone strip; 5.Control panel; 6.Power indicator; 7.Emergency stop switch; 8.Foot switch

Advantages of External Vacuum Sealing Machines

Multi-functional: Combines three key functions—vacuuming, gas flushing, and sealing—into one machine, allowing for flexible switching between operating modes to meet the needs of different products.
High Efficiency and Speed: By removing only the air from the packaging bag, the vacuuming process is fast, taking just 2–3 seconds to complete, significantly improving packaging efficiency.
Secure Sealing: Equipped with a large-bore variable-displacement cylinder that delivers powerful sealing pressure, it completely resolves the issues of loose seals and air leaks common in traditional packaging machines.
High Versatility: Not limited by product dimensions, it can easily package both oversized and irregularly shaped items. The adjustable worktable height further expands its range of applications.
Flexible Operation: Supports both foot-switch manual and one-button automatic control modes, which can be switched freely to accommodate different operating preferences and production rhythms.
Space and Cost Savings: The machine occupies a footprint of only approximately 0.5 square meters and can be operated by a single person, effectively saving production space and labor costs.

External Vacuum Sealer Applications

Electronics Industry: Used for vacuum packaging of semiconductors, circuit boards, precision electronic products, and various metal components, effectively preventing moisture and oxidation during storage and transportation.
Textiles and Home Goods: Used for vacuum compression packaging of fabrics, cotton and wool products, down products, curtains, quilts, and other items, significantly reducing volume and lowering logistics and warehousing costs.
Food Industry: Suitable for vacuum packaging of various food items such as seafood, fruits, tea, salted products, soy products, prepared foods, and nuts. This effectively prevents oxidation and spoilage, extending shelf life. When filled with nitrogen or other protective gases, it also preserves the original flavor and shape of the food while providing protection against impact.
Other Applications: Suitable for vacuum packaging of precision instruments, hardware components, medical devices, and traditional Chinese medicinal materials, providing protection against moisture, oxidation, and dust.

Why Choose Us?

We are a supplier of food processing machinery with over 15 years of experience. We offer a wide range of products, including:

If you have any product requirements, please feel free to contact us. Let us know the specific machinery you need and the quantity, and we will provide you with a quote within 12 hours.