Step 1: cool products
Step 2: air extraction
Once you have chosen the correct program and closed the lid, the vacuum process begins. In concrete terms, this means that the machine extracts all air from the bag, the product and the chamber so that the desired vacuum result is achieved or until the boiling point of the liquids has been detected.
Step 3: gas flushing (optional)
Before the bag is sealed, a preservation gas can be added. This extends the life span of the food and helps maintain the shape, color, structure and quality of the product. Gas flushing is ideal for sliced products such as fruit and vegetables.
Step 4: bag sealing
When all the air has been extracted and gas has been injected if required, the bag is sealed. This ensures that the product is protected against external factors. You can choose the right sealing system to suit the type and thickness of the vacuum bag. Henkelman machines are fitted with a double seal, but you can also opt for a cut-off or wide seal. Or, depending on the model, bi-active seal, 1-2 cut-off seal.
Step 5: aerate chamber
The final step in the vacuuming process is removing the vacuum from the chamber. This is done simply by introducing air back into the chamber through the aeration valve. Once the pressure in the chamber is equal to the pressure outside the chamber, the lid opens. If you are using the soft-air option, this step takes place gradually to prevent sharp objects from tearing through the bag or crushing a soft product.
Good to know if you are vacuum-packing
Gas Flush / MAP packaging
Extends the shelf-life and protects vulnerable products from distortion and discoloration through the addition of preservative gas
Liquid Control
Stops the vacuuming process when evaporation is detected. This prevents contamination of the chamber, oxidation of the pump, and dehydration and loss of weight
Soft air
This enables the optimal vacuum packing of sharp or sensitive products without damaging the product or vacuum bag.
Pump cleaning program
Moisture is sometimes released during the process. This collects inside the pump. The accumulation of this moisture leads to corrosion which is harmful to the pump. Every Henkelman machine automatically indicates on the display when it is time to use the pump cleaning program. The pump is heated and ventilated for five minutes, ensuring moisture to evaporate.