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thien separator

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Forum topic by jd53 posted 03-23-2014 10:54 PM 1509 views 0 times favorited 13 replies Add to Favorites Watch
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jd53

44 posts in 1033 days


03-23-2014 10:54 PM

Going to build a thien separator but have a couple questions. Can a square trash can be used? Found a heavy duty can at lowes but don’t know if square is compatible in the design. Also can trash bags be installed in the separator can? Be much easier to get rid of.


13 replies so far

View MalcolmLaurel's profile

MalcolmLaurel

269 posts in 1082 days


#1 posted 03-23-2014 11:02 PM

I don’t think a square can would work too well, the whole point is that the air swirls around in a circular motion. Trash bags, also, would probably flap around and impede the circular flow.

I used a large bucket (7 gallons, maybe) that pool chlorine came in.

-- Malcolm Laurel - http://MalcolmLaurel.com

View DIYaholic's profile

DIYaholic

19167 posts in 2134 days


#2 posted 03-23-2014 11:07 PM

I don’t know if it is hip to be square….
My thinking, (now that’s dangerous)....
That as long as you build a “Top Hat” design, a square collection bin would be acceptable. Perhaps it has been tried/discussed over on the Thien site.

As far as the bag in the bin…
I haven’t a clue on that either. Again, just my thoughts and no proof….
I believe there should be something to keep the bag from being somehow sucked up into the separator. And again, the Thien site may have a discussion.

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

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jd53

44 posts in 1033 days


#3 posted 03-23-2014 11:26 PM

Wasn’t planning on the top hat design. Don’t want to suck in a cheaper can and the square one was pretty heavy. May have been fiberglass or a filled plastic of some sort. Say a chunk of 2×4 was in the bottom of the bag, would that be enough weight to hold it in?

View DIYaholic's profile

DIYaholic

19167 posts in 2134 days


#4 posted 03-23-2014 11:32 PM

I think some people load the bottom of a bag with sawdust. ie; don’t totally empty the bag.

If you want to just do a baffle, that inserts into the bin, then I would say no to the square can.

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View lepelerin's profile

lepelerin

475 posts in 1784 days


#5 posted 03-24-2014 01:35 AM

thein design is based on cyclonic effect. Square would break the flow but it might still work to a certain point.

View Todd's profile

Todd

384 posts in 1136 days


#6 posted 03-24-2014 09:54 PM

I built mine on a Brute can.

Dust Collector Reconfiguration/Upgrade

I would recommend a tophat design.

-- Todd, Huntsville, AL

View MT_Stringer's profile

MT_Stringer

2847 posts in 2690 days


#7 posted 03-24-2014 10:00 PM

You can’t put a square peg in a round hole! :-) Round and cyclonic go hand in hand.

Good luck. Post some pics when you get it built.

-- Handcrafted by Mike Henderson - Channelview, Texas

View Charlie75's profile

Charlie75

286 posts in 1724 days


#8 posted 03-24-2014 10:17 PM

I too would think that the square can would not work because of the cyclone effect that is supposed to make the system work. Mine is a top had design with a metal trash can.

Bag in the can, when I suggested this very thing over in another forum I was discouraged from doing so by a couple of fellows who tried it. It seems that the bag was sucked into the side of the can and a vacume was created and it was near impossible to get the thing out. So I never tried it.

Charlie

-- Charlie75, Alto

View jd53's profile

jd53

44 posts in 1033 days


#9 posted 03-24-2014 10:57 PM

Thanks for all the answers. Somehow I didn’t think it would work, but worth asking anyway. Will probably end up with the Brute can and look into the tophat design some more.

View jd53's profile

jd53

44 posts in 1033 days


#10 posted 03-24-2014 11:00 PM

Question for Todd. I have that dust collector setting in my garage brand new and a wynn filter on order. Why do you recommend the tophat design?

View Holbs's profile

Holbs

1369 posts in 1488 days


#11 posted 03-25-2014 12:30 AM

i would ask phil thien himself, at his website.
I would bet.. a square bottom would make a small difference, if any. I do believe, the cyclonic action happens all uptop. Once the debris falls through the cut out, as long as no vertical obstacles in the way of the airflow it should be ok. This would only apply to the TopHat design, btw.
Yes… the trash bag in the bottom by itself will get sucked up. However, I plan to install 6 or 8 dowels 4’ in length (or so) as a “ring retainer” so to speak, to keep the plastic garbage can in it’s place. Saw a picture of such being done somewhere in my research of Thien Baffle and emptying barrels. This will be my next project after I finish off my fine tuning my 6” HVAC blast gates I constructed (6 out of 8 work 100%, but 2 are hard to slide back and forth…so gotta work on that)

-- Yes, my profile picture is of a Carpenter Bee! The name is derived from the Ancient Greek "wood-cutter"

View DIYaholic's profile

DIYaholic

19167 posts in 2134 days


#12 posted 03-25-2014 01:46 AM

The “Top Hat” design allows for better air flow, by way of an inline intake connection. As opposed to a 90° bend, from the intake going thru the top. There is also the added benefit of more capacity in the collection can.

My Thien Top Hat build….
http://lumberjocks.com/DIYaholic/blog/35193

My Modified 2HP HF DC….
http://lumberjocks.com/DIYaholic/blog/35195

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procrastination a bad thing?

View Todd's profile

Todd

384 posts in 1136 days


#13 posted 03-25-2014 04:15 PM

+1 Randy. Also, if you have a tophat design it should work with any shape container since it doesn’t really matter what happens after the material drops through the slot.

Edit: As long as the tophat is round!

-- Todd, Huntsville, AL

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