An installation for transporting bulk material, through a conveyor line by a pressurized gaseous medium, from an intake point to an outlet point thereof, comprising a plurality of control mechanisms adapted for connection to said conveyor and for introducing a pressurized gaseous medium therein, each said control mechanism comprising:
- a connecting opening adapted for connecting said control mechanism to an inlet in the conveyor line;
- an intake for gaseous medium, said intake being in communication with said connecting opening;
- a control valve operatively engaging said intake and adapted to control flow of the gaseous medium to the connecting opening via the intake;
- means for sensing pressure of the gaseous medium in the conveyor line;
- and
- means for directly controlling said control valve in response to said sensed pressure, which control mechanisms are connected to the conveyor line between said intake point and said outlet point.