Select for the material and movement
An attachment suitable for smooth sheet metal is not automatically suitable for porous wood, concrete or curved glass. The manufacturer needs to know the material, dimensions, surface and whether the workpiece will remain horizontal, tilt or rotate.
Vacuum retention and vertical lifting can be provided by different parts of the system. Pads, frame, connections and carrying machine all need assessment. Selection of Slings and lifting accessories covers this complete chain and the total load, including the attachment itself.
The surface is part of the safety system
A damaged seal, loose coating or area that does not seal can allow air into the system. Leakage through a porous workpiece must be covered by the design. Reducing the load’s weight does not, by itself, prove that adequate holding capacity remains.
Flexible pieces can progressively peel away from a pad when they overhang excessively or deform. Support distribution and load balance matter. When separating stacked sheets, planners must also consider the possibility that additional sheets remain attached by moisture or other products.
Understand supply failure
Reservoirs and non-return valves can preserve vacuum temporarily according to the configuration. They do not provide indefinite retention or compensate for every leak. Warnings must allow loss of holding capacity to be recognised and the planned response to be followed.
Redundancy or additional retention is selected according to the application and consequences of a dropped load. Reserve times, pressures and height limits must not be transferred from one device to another. Acceptance criteria come from the validated design and its instructions.
Organise use, inspection and response
The danger zone extends beyond the space directly beneath a panel: a falling piece can travel sideways. The load route should keep people outside that exposure and provide a suitable landing area.
Checks cover pads, seals, pipes, filters, gauges and warnings as well as the lifting mechanism. Testing and maintenance require competent personnel. A change of material or a developing leak requires the application to be reviewed before use continues. Repairs must not be improvised while a load remains suspended.
