Vacuum conveying system for bulk material, in particular plastic granules

A vacuum conveying system for bulk material, the vacuum conveying system comprising:

• at least two storage locations;
• at least two consumers;
• supply conduits and discharge conduits connecting the at least two storage locations and the at least two consumers to each other;
• at least one vacuum source configured to produce a vacuum flow/airflow;
• a central material conduit comprising valves, wherein the supply conduits and the discharge conduits each have one of the valves associated therewith, and wherein the valves are configured to actuate conveying paths of the bulk material from the at least two storage locations to the at least two consumers;
• wherein the valves have a first position and a second position;
• wherein in the first position the valves associated with the at least two storage locations and associated with the at least two consumers open the central material conduit;
• wherein the valves associated with the at least two storage locations in the second position provide flow communication between the central material conduit and the at least two storage locations, respectively;
• wherein the valves associated with the at least two consumers in the second position discharge the vacuum flow/air flow air from the central material conduit and simultaneously return the vacuum flow/air flow through a further connector into the central material conduit.