Protecting Products That Are Easily Crushed: The Gas Function; Sealing The Bags Hermetically: The Sealing Function - Orved Bright Serie Manual De Uso

DESCRIPTION OF ThE MAChINE AND ITS FUNCTIONS

5.2.2 PROTECTING PRODUCTS ThAT ARE EASIly CRUShED: ThE GAS FUNCTION

This is an important function, which allows delicate and compression-sensitive products to be packaged, preventing them
from being crushed due to a difference in pressure. This difference in pressure is compensated for by replacing the air
with a controlled mixture of non-oxidising food gases. Furthermore, longer preservation times can be achieved by using
appropriate gas mixtures. Please contact the distribution companies for the gas mixture selection, who offer a vast range
of specific mixtures for the type of product, besides providing the pressure adjustment equipment.
The maximum gas percentage allowed is 70%. The pressure exerted by the sealing bar will be insufficient if this threshold
is exceeded and the seal of the bags will be weak.
The software of the controls guarantees a percentage difference of 30% between the vacuum and gas. Below this value,
the depression in the chamber would be insufficient to achieve a optimal bag sealing.
The gas function is set as a percentage (recommended).
Bag entered in the gas nozzle

5.2.3 SEAlING ThE BAGS hERMETICAlly: ThE SEAlING FUNCTION

Once the vacuum has been created and the gas injected (if appli-
cable), the hermetic sealing process of the bags is activated via
one or more sealing bars. The sealing bar
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counterpart bar and the heating of the resistance is activated
simultaneously. Upon completion, the bar descends and the cham-
ber is decompressed.
The sealing duration varies according to the thickness of the bags,
the ambient room and the amount of work to be carried out. In any
case, the sealing line on the bag must be uniform, well defined and
with no melting points. The indicative basic value is 3,5 seconds per
bag having a thickness of 90 micron. The sealing bar will overheat
if the work to be carried out is particularly intense so it may be ap-
propriate to reduce the duration after about two operating hours.
If very thick bags are used or bags made of particular material (alu-
minium coupled films), the wheeled models are equipped with a
compressed air connection (nr. 18 - page 21) that allows the pres-
sure exerted on the sealing bar to be increased.
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Rev. 05 - 04/2018 - Cod. 1500458 - Instruction manual for vacuum chamber packaging machines with digital control panel "Serie Bright"
1
is pushed against the
Example of a machine with
two nozzles
2
1