How Does A Vacuum Sealer Work?

Nothing screams comfort and efficiency in the food business than easy access to well-preserved ingredients. With vacuum sealers, you can achieve this and so much more. Read on to learn to use a vacuum sealer like a pro!

Vacuum Sealing Machine

What Is a Vacuum Sealing Machine?

A vacuum sealer is a state of the art equipment that allows you to safely seal items in a container or plastic bag. Unlike other methods, this uses this technique removes air completely from the bag before closing the aperture.

Components of a Vacuum Sealing Machine

Before diving into how to use a vacuum sealer let’s check out a few of the various intrinsic parts of the machine. 

  • The Vacuum Chamber: here is the part of the machine where the food item is placed before the sealing proper.
  • The Control Panel to control the sealing operation and input your preferred settings.
  • A Vacuum Pump to push air out of the vacuum sealer and create a suitable pressure level for sealing.
  • Sealing Strips that heat up and seal the package. 
  • Lid to cover the vacuum chamber during air sealing.
  • Shell to give the machine support and protect its internal parts.
  • Power Cord to connect the machine to a power source. 

How Does a Chamber Vacuum Sealer Work?

Vacuum sealing food and other nonedible items is easy with a chamber vacuum sealer. For one, the process is automated and maintains a consistent packaging style no matter the item. They are also fast and super easy to operate.

Unlike other vacuum sealers, you barely get to see the item during packaging. All you need to do is to place the vacuum bag in the chamber and watch the machine work its magic. You can confirm that you own the best chamber vacuum sealer if it follows these steps when vacuum sealing:

  • Vacuum Extraction: The main idea at this stage is to create enough pressure to complete the sealing process. After bagging the item for vacuum sealing, go ahead and place it in the vacuum chamber. You also need to align the bag properly and place the edges on the sealing strip so it does not shift during packaging.

Once you close the lid and turn on the machine, the sealing process begins. As the vacuum pump pushes air out of the machine, the chamber submerges until it reaches the standard pressure level. The pressure also affects the vacuum bag, but at first glance, it looks as though nothing has changed with the bag.

  • Sealing of the Vacuum Bag: The sealing strips heat up and melt the packaging material to form an airtight seal on the edge of the package. The level of heat you apply depends on the packaging material you are using.

Too much heat can melt and damage the bag completely, while low heat will not seal the package correctly. Once the sealing bars have applied enough heat to the bag, they open up, and the seal forms immediately.

  • Aeration of the Chamber: The final step in chamber vacuum sealing is decompression. The machine slowly releases soft air into the chamber to ease its pressure. The vacuum bag also wrinkles up in reaction to the soft air.

Once the chamber is fully aerated, the vacuum sealing is complete, and your package is ready for storage. This process also prepares the machine for the next vacuum sealing.

Vacuum Sealing Machine 3

General Operating Principle of Vacuum Sealing Machines

Even with the different types of vacuum sealing machines available, there’s barely any difference in their operations. So, if you know how to use a food vacuum sealer, you can operate any other sealing machine easily.

The basic operation usually involves vacuuming, suctioning any traces of air, and sealing the package to keep it airtight. Factors like the size of the machine and its components do not affect its sealing efficiency.

Machine Automation

We cannot discuss how to use vacuum sealers without analyzing the technology powering these machines. It’s a fact that every vacuum sealer is automated. However, some are more automated than others.

Automation refers to the extent to which the machine can work without external influence or human input. The levels of automation in vacuum sealers include:

  •  Automatic Vacuum Sealing Machines

Apart from switching it on/off and adjusting the buttons on the control panel, this machine hardly requires human input. They are designed to complete a successful vacuum seal and create an airtight covering for your item.

As expected, they are pretty costly because of their unique features and applications. Regardless of the cost, you can take solace in the fact that you’ll get great value for your money. The machine’s speed and efficiency will be vital in growing your business.

  •  Semi-Automatic Manual Vacuum Sealing Machines

Before you can use this machine, you must have placed your item in the packaging bag and inputted all the packaging commands. They are undoubtedly automated; they just need human input to work effectively.

These semi-automatic machines can cater to the air-sealing needs of your small and medium enterprises. They are also portable and cost-effective so you can purchase one without breaking a sweat.

The Double Seaming Process

Vacuum sealing goes beyond packaging things in a nylon bag. With the double-seaming process, you can create an airtight package for metal cans as well. The process usually involves three stages:

  • Compression Stage: the can goes through the seaming machine for the first time when the lid covers the open end.  At this stage, the machine compresses the body and the lid while holding them in place.
  • First Roller Operation: Next up, the machine folds and bends the edge of the can into one and creates the first seal. The machine applies a rubber sealing compound to strengthen the seal at this stage. 
  • Second Roller Operation: To complete the sealing process, the metal can undergo the second seaming process. The seam roller irons out the rubber seal from the first seam to tighten the lid.


A vacuum sealer machine is a priceless piece of equipment you need for various functions in factories and even in homes. Now you know how it works; you can proceed to get one from reputable manufacturers like SaintyCo.

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