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Tips & Tricks no. 5 - How to calculate the correct total air quantity
As a rule the ideal powder velocity to is 10 - 15 m/s. To achieve this result you must calculate the total air. The two crucial factors in this are the values for:
- The internal diameter of the hose
- The velocity of the powder
For the sample calculation below we assume a powder velocity of 12 m/s and an internal hose diameter of 9 mm (r = 4.5 mm).
This is the formula:
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In real terms this means that you must set a total air figure (feed and dosage air together) of 2.7m3/h. To make things a little easier for you we have already calculated the total air quantity for the most common internal hose diameters:
Internal hose Ø
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Powder velocity
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Total air
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9 mm
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12 m/sec
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2.7 m3/h
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10 mm
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12 m/sec
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3.4 m3/h
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11 mm
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12 m/sec
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4.1 m3/h
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12 mm
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12 m/sec
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4.9 m3/h
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Learn how to set the total air in the next issue of our Tips & Tricks.
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WAGNER-Group
