Reply by crank49

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Posted on going to build a separator

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4032 posts in 2997 days

#1 posted 12-04-2012 03:59 PM

The kit, since you already bought it will work adequately.

If you wanted the most efficient separation of dust and air, you wasted the money for the kit.
The Thein Baffle would be more efficient than any of the lids I have seen. Note: I do not know which kit you bought, but I am assuming the “Vortex Lid”.

The best separation will be had by inputting the air/dust stream tangent to the outer edge of the container and extracting the air flow up through the center. Also, the center tube should extend into the container to a point below the lowest point of the input. Without the baffle what you loose is about half the volume capacity of the container. In other words, when the container gets half full the spinning flow will re-entrain the lighter dust and carry it out the discharge with the air.

A cyclone shaped separator with the bottom (small end) of the cone sealed to the center of the container’s lid is the very best if it is sized properly. The spinning air flow does not get into the container very much at all and therefore does not get a chance to pick the dropped dust back up.

So, the efficiency rating of the various systems out there, from best to worst, would be #1. Cyclone sitting on top of a dust container. #2. Thein Baffle sitting on top of a dust container. #3. Home made separator lid with tangent inlet and centered outlet. #4. Purchased separator lids with 180 degree opposed inlet and outlet. #5. A simple drop out box with a center baffle between inlet and outlet.

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