In order to contain powder in a spray booth, what is the required airflow through the openings?
A. Not all booths are engineered the same. What is desired is a soft airflow, which will keep powder from drifting out of the booth. Too much airflow through the booth openings will cause a loss of transfer efficiency because the airflow is too strong and will overcome the electrostatic attraction of the charged particle to the grounded substrate. Our booths operate with an ideal airflow of 120 fpm on average through the booth openings. However there are other factors to take into consideration: gun location, filter pressure differential, etc.
