Wellcome HOKAIDO Vacuum

Pneumatic Conveying

Which process are the vacuum conveying systems working for?


Pneumatic conveying is always used for the transportation of sensitive material which requires non-contact the ambient air. Pneumatic conveying systems are primarily used in the food & plastics industry and in the pharmaceutical and chemical industries.


Fluidizable material can be conveyed safely and economically with stand-alone vacuum pumps and central systems. Dust free and therefore loss-free conveying, simple design of the piping and no deformation of the conveyed material are assured.


The vacuum pump must be designed so that the air velocity in the conveyance conduits does not drop below the minimum rate, even at the machine located the farthest away, and that no plugs build up. This requires a higher air velocity at the pump High conveyance velocities, however, lead to increased wear of the conduits and to abrasion of the goods. Therefore, selecting the optimal air velocity or blower is of utmost importance. Optimal air volumes can be achieved in modern conveyance installations with frequency regulated vacuum pumps.


Which Hokaido vacuum solutions are suitable for pneumatic conveying?


RC dry claw vacuum pumps, which use the Hokaido claw technology principle, represent the most economical, reliable and clean solution available for the pneumatic conveying of sensitive materials. The extracted air is compressed without operating fluids and runs virtually maintenance-free.


In the pioneering age of pneumatic conveyance, demand was largely for transporting foodstuffs such as grain and flour.

Today, such installations are constructed for a wide variety of uses, such as transporting


goods in dust particle form (flour, cement)

grain-type goods (dragées, granulate, pellets)

piece goods (pneumatic tube conveying systems)

mixed goods.


Special requirements must be observed in these areas. Mixed goods, for example, may not be mixed with different size grains during transport. In addition, the goods should not rub together, which would cause abrasion. This is just as important for explosive granulate as it is for avoiding static electricity.


Pourable goods can generally be transported with vacuum or pressurized air conveyance systems.


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