I´m looking for information about air velocity in a focused extraction for a dust collection. Is there a standard, guideline or good practices for the air velocity measures should an focused extraction have? The measures are made in the ducts or in a bell(for example).
What velocity should it have? or between what Ranges?
And finally, How or where the measure should be done? inside the duct, on the bell, 15-30cm from the bell or focused extraction. I already know the method for the air velocity in laminar flow modules.
thanks in advance for your help!