I have a tank that fills at a known rate (14000 lb/min) and the material density (51 lb/cu ft). I am trying to verify that my dust collection system is drawing enough air to prevent dusting. Basically, I want CFM in less than CFM out. I applied a formula I found (CFM= lb/min divided by lb/cu ft). This seems correct. Am I overlooking key points? By the way, my dust collector says it's pulling aprox 400 cfm and I calculate 275 cfm going into the tank.
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