Pneumatically transporting product in bulk is, roughly, to introduce a granular or powder product in a stream of air flowing along a conduit.

The advantages of this kind of transport are based primarily on the simplicity layout transmission lines, the ease tocollect products from different points and distribute them to multiple destinations using a common line, the low maintenance and footprint needed, the easy d economic installation and its cleanliness.

A pneumatic conveying system consists of a generator of pressure (blower, fan or compressor) a feeder (rotary locks, injectors or pressure vessels), a transmission line (pipes, junctions, valves...) and a solid air separator element (filters or cyclones).

Given the relationship between the weight of the product and the weight of the air carrier, we can distinguish 2 types of systems:

• Transport in dilute phase: Large volumes of air at high speed are required. It is used for high transport capacity and not fragile or abrasive products with few problems of disintegration.

• Dense phase transport: The volume of air is much lower and the solid is transported by push packages. Therefore, it requires more pressure and a significantly lower volume of air. Energy consumption and transport speed and consequently wear and tear are lower. It is used for low capacities and fragile or abrasive products or where the desintegration is an admissible factor. It also prevents damage by rubbing.