Vetter S.Tec Lifting bags 10 bar (145 psi) - Manual (Page 7)

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Temperature resistance of S.Tec Bags:
Cold resistance -40° C
Cold flexible -20° C
Heat resistance long-term +90° C
Heat resistance short-term +115° C
The aramide layer on the S.Tec Bag can be
damaged by damage made to the bag
surface, e.g. cuts, cracks, punctures or
by the effects of ozone.
Therefore with a visual check after every operation, special atten-
tion is to be made to the following types of damage:
9 Damage by separation
9 Damage by cuts
9 Damage by punctures
9 Damage by heat and chemicals
Danger of bursting! If, when carrying out the
check, this type of damage is determined
then the bag is to be immediately taken
out of service. Repair is not possible.
In order to use the maximum lifting power, the total effective area,
i.e. the total area minus the edge area, must be completely under
the load to be lifted and that the bag must be taken to the maxi-
mum permitted operating pressure.
The bag develops a spherical shape (with rectangular or square
base) as the lift height increases. This is the reason why the con-
tact area with the load decreases until at a max. bag curvature this
will be almost zero. The largest lift height of the S.Tec Bag will only
be reached in the unloaded state.
In case the lifting power produced by the S.Tec Bag is not suffici-
ent, depending on the lift height, then a number of S.Tec Bags can
be placed next to each other.
Effective/supporting area