Reply by crank49

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Posted on Cyclone Dust collection

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4032 posts in 2995 days

#1 posted 03-22-2013 03:26 PM

I don’t know who appointed Bill Pentz the “Dust Collecting God” around here, or maybe he just gets misquoted a lot, but you can not just flat out say any one needs at least 1000 CFM at the tool to capture the finest dust particles. That is just wrong on so many levels you need to be in an elevator to say it.
1.- Fine particles are easier to capture and transport than big or heavy ones.
2.- The CFM required at the tool depends on the tool, and hood design dictates the CFM required.
3.- The hood design has to account for the velocity and mass of the dust particles and the CFM and Static pressure available in the collector system has to generate the capture velocity needed to capture the dust being generated.
4.- The system CFM has to match the requirements of the hood.. A well designed, close capture hood can capture more dust with less CFM but might require more inches of static pressure, while a large side draft hood might need a very large CFM but have very low pressure requirements.
Bottom Line: There is NO single answer.

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