So to clarify, if I change the vacuum opening from a long rectangle slot of a single 1 inch circle, does the suction velocity increase, or does the flow decrease?
I've been trying calculate the capacity of one of our dust collection systems. It features four vacuum slots lined up (27 inches by 1 inch each) shown as #3 on the diagram attached.
Using a manometer, I took pressure measurements at points #1 and #2. Both were around 1.1 inwc, which...