Vetter Wedge Lifting bags - Manual (Page 6)

VETTER Wedge Lifting Bags 1 bar / 14.5 psi 6 to
Page 5/12
3. Preparing the product for use
3.1 Preparations for operation
Remove the set of wedge lifting bags from the transport and un-
pack the packing bag. Make certain that the inflation device is
ready for operation. Make certain that there is sufficient air sup-
ply available. Connect the inflation hoses on the one side to the
Wedge Lifting Bags and on the other side according to the colours
to the dual controller.
Only perfectly working and tested lifting bag
systems are to be used.
The person in charge of the operation is to decide on the method
and how it is to be applied from case to case within the field of his
responsibility as well as observance of the operating instructions
of the user.
3.2 Application instructions
Lifting bags, irrespective of the type, are unstable over the com-
plete lifting distance! When using just one bag it must be posi-
tioned exactly under the load‘s centre of gravity otherwise load
movement cannot be avoided.
In practise, exact positioning is not possible!
Before moving the wedge lifting bag under the load it should be
ensured that the side wall material is positioned between the top
and bottom plates. Under no circumstances should the side wall
material be between the load and top or the load and bottom du-
ring the lifting sequence. This can, under certain circumstances,
cause damage to the side wall of the bag. If the movement height
or the movement area is not sufficient for correct application of
the lifting bag, then the required space can normally be quickly
obtained by using the Vetter Mini Lifting Bag 8 bar.
Move the wedge lifting bag to a suitable position so that at least
75% of the supporting bag surface is under the load.
Normally at least two bags are used of the same type and size. Po-
sition each bag near to the end of the load. If necessary use lines
for drawing under the load or lower between loads which have to
be pressed apart.
Due to low bearing pressure, under-support for ground fixture is
only necessary in exceptional cases.
The load to be lifted is to be secured
against slipping by suitable measures !
If the use of one bag cannot be avoided then positioning stability
of the load is to be ensured. However, if two bags are used and if
one bag is placed to the front part and the other bag to the rear
part of the load then the centre of gravity will always be between
the two bags.