27.4 TYPES OF VACUUM LIFTERS

For convenience, the four types of vacuum lifter covered by this section can be dealt with in two groups, the self priming or self actuating type and the non self priming or powered type.

All vacuum lifters should be designed to hold a load corresponding to two times the working load limit at the end of the working range and the beginning of the danger range at all intended angles of lift.

The shape of the vacuum pads should be matched to the load to be lifted and if more than one vacuum pad is being used, the share the load imposed on each vacuum pad must not exceed the working load limit of the individual vacuum pad.

For vacuum lifters with the facility to orientate the load, the controls for tilting or turning the load must be the hold to run type.