The air supply equipment transmits the necessary energy to generate the pressure needed by a flow to be conveyed through an installation.
Its design and dimensioning is carried out based on certain characteristics of the installation, such flow density and viscosity, pressure, design and working temperature, the maximum height of elevation, length and diameter of the piping, and pressure drop.
The pump equipment generates positive pressure, pushing the product to its destination or negative pressure, vacuuming the product to its destination.
Depending on the flow to be conveyed, pumps can be classified into compressors and fans.
The compressors are proper to large flow volumes without large pressure increases, while fans are suitable to convey reduced volumes at high pressure.

CLASSIFICATION ACCORDING TO WORKING PRESSURE

→ Low Pressure or fans: up to 70 Pascals
→ Medium Pressure or blowers: between 70 and 3,000 Pascals
→ High Pressure or turbo blowers: more than 3,000 Pascals. between 800 and 2500 mm c water
→ Very high pressure or turbochargers: greater than 2500 mm c water
0 IMPULSION
IMPULSIÓN

BLOWERS

IMPULSION EQUIPMENT PROVIDING PRESSURES BETWEEN -1 and 1 bar

POSITIVE DISPLACEMENT BLOWER

→ Compression (quotient between the outlet pressure and the inlet pressure): 4
→ Flow rates between 0.5 and 200 m3 / min
→ Rotor speed of rotation: 1000 to 5000 r.p.m
→ Constant volume
→ Variable discharge pressure
→ Variation of flow or volume supplied by modifying the speed of rotation..

CENTRIFUGE BLOWERS AND TURBOCHARGERS

→ Equipment useful to achieve appreciable increases in pressure
→ Given the low density of the flow they drive, they must operate at a high speed of rotation (1000 and 30000 r.p.m)
→ Compression ratios from 3 to 4.5
→ Flow rates between 30 and 30,000 m3 / min
2 IMPULSION

FANS

In pneumatic conveying, fans are employed to produce pressure on a flow to convey the bulk material from one point to another of the pipeline.

Fans employed in pneumatic conveying can also be applied as other equipment support, such as dedusting systems, filtration, etc.
They can be classified according to the flow trail in a centrifugal or axial way.
In selectioning a fan, parameters such as the flow rate that must be conveyed, pressure drop, etc, must be taken into account, so that the working pressure can be estimated.
​Fan flow and pressure are dependent on each other. They are represented graphically in the fan characteristics curve where is represented the fan operation from the maximum flow rate to the flow rate 0, reflecting the fan’s performance on its different sections, locating the adequate and unstable performance.