Eductor for skimmers?

[dngspot]

Has anyone have a link to one of these? I have seen threads on TRT but the pics are gone. The guys who have built them say they do better than the Beckett.

[dngspot]

bump

[Icefire]

eductor are for flow increase in tank with a pressure rated pump, nothing for a skimmer.

[aries70]

I've been wondering how they use the eductors for skimmer's myself. The TRT threads w/out pics suck, it happens way to often over there.

[EnderG60]

i have though about using one to boost the recirc pump(inside the skimmer, not as in injector), but came to the conclusion its not worth the effort.

[dngspot]

Along with posting the question, I have been searching the forums on TRT. I came across this image. The new question is do I need to scale it down to 1/2 inch to get it to work with a mag 9.5? I am also working on a design of my own and may try it out.
Thanks
http://www.thereeftank.com/photopost/data/500/attachment.jpeg

[EnderG60]

thats just a basic injector. I have made a few skimmers with those using two 3/4" to 1/2" threaded bushings and a 1/2" barb all in a 3/4" compression T. Lets you adjust the nozzle and tune it better.

Unless your using a pressure pump they dont work very well, picking up a Needle wheel pump will work better and cost less(both to buy and run) when compared to that plus the pressure pump you will need to power it.

[dngspot]

I am finally getting around to this.
I took a Geo Skimmer and made some changes to the down tube and the beckett housing. When I did this it made it easy to make modifications to the housing, with out permanently changing it. With 3 fittings it is made.
The beckett will set up a froth in the reaction tube that is incredible. The eductor/nozzle seems a little weak here but still is able to raise skimmate. The bubbles seem pretty small also. On thing that it will out shine the beckett is its need for cleaning. The eductor/nozzle will need very little. I will let it go for a bit and see what its skimmate production is.
I am calling it a nozzle because it is pretty close to a down draft system, less the bio balls.
I am pushing water into it with a Panworld 150 PS.

Any comments are greatly appreciated.

http://www.wichitaaquariumclub.com/photopost/data/500/medium/DSCF00065.JPG

[JCTewks]

That is the same idea as the ETSS downdraft skimemrs...only the downdrafts have bioballs ion the downtube to further "chop" the air.

[dngspot]

Yep, that may be something to try in the future.

[2_zoa]

If I understand this pic. correctly you have made an intake bell and are introducing air there because it is open right? Like holding a garden hose just inside a pipe that is larger in diameter than the hose.

[H20ENG]

I have made a bunch like that and they work great. They are on par with becketts but in a smaller package. Its easier to just use a beckett though. Needlewheels have taken over for me since they use less power.

This is how I oriented the parts inside. I used threaded fittings facing each other in the head so I could do some R&D.
http://reefcentral.com/gallery/data/500/14095Injector1.gif

I played with different hose barbs and fittings they went down into. It is just another venturi as mentioned:)
http://reefcentral.com/gallery/data/500/14095skim8.jpg

http://reefcentral.com/gallery/data/500/14095skim7.jpg

http://reefcentral.com/gallery/data/500/14095skim3.jpg

More:
http://reefcentral.com/gallery/data/500/14095inj1.jpg

http://reefcentral.com/gallery/data/500/14095inj2.jpg

This is the last one I made with those injectors. It used 2 injectors and a NW pump. Kicked Butt!! After this one it was Becketts or NWs. HTHs. Have fun!
http://reefcentral.com/gallery/data/500/14095inside_view.jpg

[H20ENG]

After that first drawing, I was able to get it all inside 1" plumbing:)

[H20ENG]

Dng,
From your pic above, try extending the hose barb to go down inside the downtube a bit. I had most success with only having a thin airgap between the barb and the downtube fitting. Kinda like a venturi:)

[2_zoa]

<a href=showthread.php?s=&postid=13593095#post13593095 target=_blank>Originally posted</a> by H20ENG
After that first drawing, I was able to get it all inside 1" plumbing:)



Not try to hijack the thread here......

What size and what kind of pump did you use?
What was your final parts list?

[dngspot]

I am no longer pursuing this project. I have found the Optimized Beckett to be a better and more efficient design for my application.
Thanks for the input.
Here is the link.
http://reefcentral.com/forums/showthread.php?s=&postid=13592811#post13592811

[H20ENG]

Told ya:D

[dngspot]

Yep you did, but when I did the update to my skimmer I did it with the idea that I would be trying out a couple different nozzles. I did the standard beckett first, then the eductor and finaly the Optimized Beckett. I am happy that I did them all and got the question out of my head.

[2_zoa]

<a href=showthread.php?s=&postid=13593798#post13593798 target=_blank>Originally posted</a> by H20ENG
Told ya:D


I wpolud still like to know. Thanks.

[2_zoa]

uh... that was supposed to be .................would

My uh tongue got wrapped around my eye tooth and I couldn't see what I was saying.

[H20ENG]

Dng,
what pump are you driving the Beckett with?

[dngspot]

A Panworld 150PS