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Reply by crank49

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Posted on Dust collection strategy

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crank49

3343 posts in 1576 days


#1 posted 814 days ago

Most small systems will only function correctly with one port open at a time. In some cases, two ports work.

By small systems I mean 2HP collectors and yes they usually have one 5” inlet.

It would be best to use 5” duct, but that is not something easily found, and expensive if you do find it..

By two ports I mean a 4” and a 2 1/2” open at the same time. A setup used on router tables and table saws sometimes; 4” to the saw base and 2 1/2” to the table top blade guard for example.

I think what you refer to with the “sheet of metal in a slot in the port” is a homemade version of a blast gate.
Sheet of metal in a slot will have leakage that will rob the system of performance. Buy or make true blast gates for this function.

-- Michael :-{| “If you tell a big enough lie and tell it frequently enough, it will be believed.” ― A H


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