Hello.
My experience with barrel shape: it is - as Gale already said - not that significant.
I have build a Thien Separator on top of a Systainer 5. These boxes are made by Tanos and used often as tool case. The handle was removed and a rectangle hole cut in the lid. The box was seald with thick CA (a bit tricky) and the Thien Separator in top hat design can be fixed with the fasteners of the systainer in raised position (originally meant to pile the Systainers).
Festo, Mafell and Rokamat are manufacturing vaccuum cleaners which accept Systainers on their top. That gives a nice and compact extraction system.
I determined the efficiency by weighing Systainer plus Separator and the shop vac separately before and after doing concrete grinding with a light diamond disc grinder.
This overall performance doesn't say something about the degree of separating fines but it gives an idea.
I got 433,8g dust caught by the separator and 37,6g in the vac. That is about 92% caught by the Thien separator. That speaks for itself.
And this is time to congratulate Phil for his great idea. Solving a complex problem in a simple way - that is the real clue!
My experience with barrel shape: it is - as Gale already said - not that significant.
I have build a Thien Separator on top of a Systainer 5. These boxes are made by Tanos and used often as tool case. The handle was removed and a rectangle hole cut in the lid. The box was seald with thick CA (a bit tricky) and the Thien Separator in top hat design can be fixed with the fasteners of the systainer in raised position (originally meant to pile the Systainers).
Festo, Mafell and Rokamat are manufacturing vaccuum cleaners which accept Systainers on their top. That gives a nice and compact extraction system.
I determined the efficiency by weighing Systainer plus Separator and the shop vac separately before and after doing concrete grinding with a light diamond disc grinder.
This overall performance doesn't say something about the degree of separating fines but it gives an idea.
I got 433,8g dust caught by the separator and 37,6g in the vac. That is about 92% caught by the Thien separator. That speaks for itself.
And this is time to congratulate Phil for his great idea. Solving a complex problem in a simple way - that is the real clue!