Air Quality

I am currently designing a fluidized bed tank for PVC powder dipping, but I don’t know what temperature air inlet is required. And does the air inlet system need an oil and water filter?


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Q. I am currently designing a fluidized bed tank for PVC powder dipping, but I don’t know what temperature air inlet is required. And does the air inlet system need an oil and water filter? L. D.

 

A. Clean, dry, compressed air is a necessity for powder coating, whether it’s applied using spray equipment or fluidized bed dipping. The reason for this is the powder coating will readily absorb moisture and oil will cause contamination and adhesion problems. Furthermore, the fluid bed membrane or plate will be plugged if there is an abundance of dirt or even a hint of oil.
The recommended air quality standard for powder coating is: a dew point of +38°F or lower, less than 0.1 ppm oil, and no particulates greater than 0.3 µm. 

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