Evacuation of Air - minimum Capture Velocities to avoid Pollution products transferred to the Room
Required capture velocity of evacuating air to avoid pollution products from galvanic baths, spray painting boxes and more contaminating the surrounding room and environment
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The tables below can be used to indicate necessary capture velocity of evacuating air in a distance - x - from the outlet opening to avoid pollution products transferred to the surrounding room and environments.
The pollution source is in a distance - x - from the outlet opening.
| Process | Product speed |
Velocity - v1 - |
|
| m/s | fpm | ||
| Galvanic baths, stain baths, kitchen hoods, smith hoods etc. | small | 0.2 - 0.5 | 40 - 100 |
| Spray painting, unloading and loading of bags, welding etc. | moderate | 0.5 - 1.0 | 100 - 200 |
| Unloading moulds | high | 1.0 - 2.0 | 200 - 400 |
| Grinding, honing, sand blaster etc. | very high | 3.0 - 10.0 | 600 - 2000 |
| Process Baths | Required Capture Velocity - v1 - |
|
| m/s | fpm | |
| Hardening | 0.4 | 80 |
| Stain, cold | 0.3 | 60 |
| Stain, hot | 0.5 | 100 |
| Defating | 0.3 | 60 |
| Galvanic, chrome or cadmium | 0.4 | 80 |
| Water, not boiling | 0.2 | 40 |
| Water, boiling | 0.4 | 80 |
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