Pneumatic Conveying Pneumatic Conveying, Vacuum Pressure, Dilute Phase, Pneumatic Conveying, Vacuum Pressure, Dense Phase Fans, Cyclones & Vacuum Systems Vacuum Pressure, Portable Railcar Unloaders, Truck Unloaders, Self Contained Bulk Truck Loaders, Pneumatic Systems & Blenders for the Plastics Industry Vacuum Hopper.