Gas injection

Technique to extend the useful life and to offer a greater protection of your product.

Why and for what to use the gas injection?

Once the vacuum process is complete, the bag is ready for sealing. Gas can be injected before this. This technique is called MAP (packaging with protective atmosphere). This process is mainly carried out to increase the useful life of the product, provide greater protection and / or prevent the product from losing color. Normally is used a mixture of nitrogen (N2) and carbon dioxide (CO2). Oxygen (O2) can also be added to this combination. Lately, the use of argon (Ar) gas has increased, since it contains the same properties as nitrogen (N2).


Some examples of products where gas injection is useful are: cut lettuce, salad leaves, minced meat, steaks, cooked fish, pre-cooked products, potatoes and ready-to-use products. The proper gas mixture depends on the product. Your gas distributor can offer you better information regarding the optimal composition. A special pump for oxygen (O2) is available for gas mixtures of more than 20% oxygen (O2).

Effects of different gases

Nitrogen (N2) and Argon (Ar) remove particles from moisture.

Carbon Dioxide (CO2) stops bacteria and mold growth.

Oxygen (O2) maintains the red or pink color of the meat.

Advantages of gas injection

It helps in the conservation of some specific foods, especially those that cannot be caked.

It prevents the crushing of the product to be packaged, ideal for fragile products.

It prevents the darkening of red meat (thermo-sealing).



Connect the approved gas cylinder / bottle to the connection nipple located on the back of the packaging machine

Open the gas bottle and adjust the outlet pressure using the regulator-indicator.

Adjust the gas inlet time or the compensation percentage with the vacuum in the chamber.

After the vacuum process, the machine will inject the gas.

The bag or tray is vacuum packed with the programmed gas injection inside it. The product to be packaged never suffers crushing.

Do you need more information about available gases? Consult with one of the experts below.