Frequently asked questions (FAQ) about vacuum machines

What is a vacuum packing machine?

A vacuum packing machine is a device that removes the air from inside a plastic bag containing food before hermetically sealing it. The main aim is to preserve food by preventing the growth of bacteria and slowing down spoilage.

Why use a vacuum packing machine to preserve food?

Using a vacuum packing machine considerably extends the shelf life (3 to 5 times) of foodstuffs without altering their taste, nutritional qualities or fresh appearance. This prevents mold and oxidation, and reduces food waste.

How to choose your vacuum packing machine?

To choose your sous vide machine, you can take into account :

• Your use: occasional or frequent.
• Your desired features: manual/automatic vacuuming, multiple sealing, etc.
• Your budget
• The size of the product, depending on the space you have available.

Do I need specific accessories to use a vacuum sealer?

You'll need vacuum bags or rollers adapted to your machine model to properly vacuum pack your food product.

Are vacuum bags reusable?

Some vacuum bags can be reused several times, especially if the food they contained was clean and low-odour. However, it' s best to use a new bag if you have any doubts about the cleanliness of the previous one.

Is it possible to vacuum-pack gastronorm containers?

Yes, some sous-vide machines alsooffer an accessory for vacuum-packing directly into gastronorm trays without having to use a bag.

What is the shelf life of vacuum-packed food?

Shelf life varies according to the type of food:

• Raw meat and fish: up to 2 weeks.
• Fruit: up to 3 weeks.
• Vegetables: up to 4 weeks. It may also depend on the initial freshness of the food, as well as storage conditions (refrigerator or freezer).

Are there any health risks associated with vacuum packing machines?

No, as long as you use your machine correctly, following the manufacturer's instructions and complying with health standards (regular cleaning, proper use). The risk exists mainly when using a machine in poor condition or with incompatible accessories.

Can I cook my food in a vacuum bag?

Vacuum-packed food can be cooked at low temperatures (between 50°C and 90°C) using sous-vide cooking, which ensures even cooking and preserves the food's nutrients. Make sure that the bags used for this technique are heat-resistant.

Can all types of food be vacuum packed?

Yes, almost any type of food can be vacuum packed, including meat, vegetables, fruit and even certain liquid products such as soups and sauces, provided they have been chilled beforehand.

Can salads and raw vegetables be vacuum-packed?

Yes, salads and raw vegetables can be vacuum-packed to prolong their freshness. However, care must be taken not to crush fragile vegetables during air suction.

Can I vacuum-pack hot products?

No, it is not recommended to pack hot products, as this can encourage bacterial proliferation. It is advisable to cool food before vacuum packing.

Is it possible to vacuum-pack a sauce dish such as blanquette de veau?

Yes, dishes in sauce can be vacuum-packed, provided the sauce has been chilled beforehand to avoid any temperature-related risks.

Does a product that needs to be kept cool need to be kept cool after vacuum packing?

Yes, a product that should normally be kept refrigerated should always be kept refrigerated even after vacuum-packing, to ensure optimum preservation.

Can vacuum-packed food be kept at room temperature?

This depends on the type of food in the bag. Some non-perishable foods, such as nuts or certain cereals, can be stored at room temperature, but most should be kept in a cool place.

Is there an official list of best-before dates for all products?

No, there is no official list, as shelf life depends largely on storage conditions and the type and freshness of the food. We do, however, advise you to respect the best-before dates generally encountered for each category of food.

What is protective atmosphere or M.A.P?

Modified Atmosphere Packaging (MAP) is a process which consists of modifying the internal atmosphere of the packaging by adding or removing gases such as oxygen, carbon dioxide and/or nitrogen to further extend shelf life.

How to choose the right vacuum bag size?

To choose the right bag size: measure the length and width of the product to be packaged, and add around 10 cm in height to allow sufficient space between the top edge of the product and that of the bag to facilitate hermetic sealing.

What bag thicknesses are required?

Common bag thicknesses range from 60 microns to 200 microns, depending on the application:

• For domestic use with low suction, prefer bags between 60 and 90 microns.
• For professional use or with larger food items, opt for bags between 100 and 200 microns.

Do vacuum machines need servicing?

Yes, an annual service is recommended to keep the machine running smoothly, especially if it is used frequently. In case of intensive use (daily use of more than 4 hours), a half-yearly overhaul is recommended. This maintenance must be carried out by a qualified professional

Can I carry out maintenance without the intervention of a professional?

Yes, after each use, clean the bell and cover with a damp cloth. Every week, check the oil level and top it up if necessary.

Can I use detergents/solvents to clean the machine?

Avoid aggressive detergents and solvents, which can damage parts of the machine. Use only cleaning products specified by the manufacturer.

When should I add oil to the pump?

Consult the manufacturer's operating manual to find out when to add oil to the pump at the recommended intervals. Generally speaking, it is advisable to add oil to the pump every month. Check your oil level and, if necessary, add a little at a time, up to the maximum permitted limit.

When should I change the oil in my pump?

The oil should be changed according to the manufacturer's instructions, generally every 6 to 12 months, depending on the use of your machine.

When should I change the pump oil filter?

We recommend changing the filter every 6 months and after every oil change. Follow the manufacturer's recommendations.

When and how to maintain the sealing bar?

To maintain your sealing bar: Unplug your unit, regularly check its cleanliness, gently wipe with a soft cloth, and replace damaged parts according to the manufacturer's instructions.

How do I replace the silicone seal on the sealing bar?

Follow the manufacturer's instructions to remove the old silicone seal and install the new one correctly.

How do I replace the cover gasket?

The cover gasket must also be replaced in accordance with the manufacturer's instructions to avoid sealing problems.