dudedudedude
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Does anyone know from experience or speaking to Hagan which pumps have a faster than stadard pump speed?
DIY Red Dragon Pumps, gathering ideas.
- Thread starter hahnmeister
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Still nothing 40 scfh. Not impressive for a 1500 gph pump.
I tried everything to get more but thats it i am afraid of.
The 2905 is the champion of the 2 by a long shot. Maybe someone with a better understanding with skimmer pumps can do better than i, But i am tapped out of idea's.
I tried everything to get more but thats it i am afraid of.
The 2905 is the champion of the 2 by a long shot. Maybe someone with a better understanding with skimmer pumps can do better than i, But i am tapped out of idea's.
Creetin: What impeller did you substitute into the 5000?
Still no clue what the wattage is? If it does 40 scfh at 40 or less watts then I am impressed. I doubt the wattage would be more than cut in half however...
At 40 scfh are you getting lots of water flow, or is the air/water ratio good?
Still no clue what the wattage is? If it does 40 scfh at 40 or less watts then I am impressed. I doubt the wattage would be more than cut in half however...
At 40 scfh are you getting lots of water flow, or is the air/water ratio good?
Too much waterflow! It would blow the cups off any skimmer thats not 4 feet tall. I will try restricting the flow more but the little tests i did it reduced scfh as well.
Now someone with more skills than i with this may get more out of it as i am just a rookie in modding pumps.
I got the replacement 5000 impeller, I didnt know atthe time when i orderd that the maxflows were stainless, and even then i knew i was just going to cut off the fan anyways.
I don't have my killowatt yet as i saved 10bucks getting it off ebay and its sent snail mail. I'll post the watts when it gets here. It was shipped from florida monday so i hope its here by the weekend. I wish i had a flow meter as well because if i was to guess i am still getting close to what the pumps are designed for.
Now someone with more skills than i with this may get more out of it as i am just a rookie in modding pumps.
I got the replacement 5000 impeller, I didnt know atthe time when i orderd that the maxflows were stainless, and even then i knew i was just going to cut off the fan anyways.
I don't have my killowatt yet as i saved 10bucks getting it off ebay and its sent snail mail. I'll post the watts when it gets here. It was shipped from florida monday so i hope its here by the weekend. I wish i had a flow meter as well because if i was to guess i am still getting close to what the pumps are designed for.
What are you using for a venturi?
I would use a 1/2" pvc piece about 1" long stuffed inside a 2.5" long piece of 1" PVC (might need a 3/4" piece of PVC in the middle to make the transition). Grind the transition from 1" to 1/2" so it is smooth on both sides with a dremel. You want a 1" to 1/2" then back out to 1" transition. The air line should go in on the pump side on the slope from 1/2" back out to 1".
If you are getting too much water and not enough air that makes me think your venturi is not right.
I am not ready to give up on the 5000 yet.
Wattage will likely be high if you are still moving lots of water.
I would use a 1/2" pvc piece about 1" long stuffed inside a 2.5" long piece of 1" PVC (might need a 3/4" piece of PVC in the middle to make the transition). Grind the transition from 1" to 1/2" so it is smooth on both sides with a dremel. You want a 1" to 1/2" then back out to 1" transition. The air line should go in on the pump side on the slope from 1/2" back out to 1".
If you are getting too much water and not enough air that makes me think your venturi is not right.
I am not ready to give up on the 5000 yet.
Wattage will likely be high if you are still moving lots of water.
Well i just took a2 inch long piece of 3/4 inch pvc and drilled a 1/2 inch hole on an 30 to 45 degree angle to the pump and cut a 90 degree angle in the 3/8ths vinyl tubing and ran that in at an angle to where the side to where the pump was going to be. Then i placed it on, and fired her up. I got 60+ scfh with short bursts of 80 scfh.
I thought of making it a little bit easier for the air to get in via a Y rather a T. Dunno if that makes sense but it got me 20+ more scfh. I tried a venturi similar to your description, But it just choked out the pump too much. Maybe i did it wrong, Its late and i am off to bed for now, But 60 scfh i can live with and the flow was cut down alot. No where near what it was.
I thought of making it a little bit easier for the air to get in via a Y rather a T. Dunno if that makes sense but it got me 20+ more scfh. I tried a venturi similar to your description, But it just choked out the pump too much. Maybe i did it wrong, Its late and i am off to bed for now, But 60 scfh i can live with and the flow was cut down alot. No where near what it was.
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hahnmeister
In Memoriam
60-80 was what I was predicting... actually, Ill admit... more about 60... but if 80 is sustainable, that would be great. A larger meshwheel might be in order...
My replacement impeller should be here any day now.
My replacement impeller should be here any day now.
Sounds like a venturi problem for sure.
I had the same issues with the prototype needlewheel darts.
A proper venturi will work wonders for you.
Here : http://www.aquaticeco.com/index.cfm/fuseaction/product.detail/iid/9841
is a large one you could adapt to 1.25"
John
I had the same issues with the prototype needlewheel darts.
A proper venturi will work wonders for you.
Here : http://www.aquaticeco.com/index.cfm/fuseaction/product.detail/iid/9841
is a large one you could adapt to 1.25"
John
douggiestyle
New member
<a href=showthread.php?s=&postid=9909463#post9909463 target=_blank>Originally posted</a> by captain7359
Has anyone tried making a more true pump impeller with metala or one of the pf materials. by making a metala or pf "doughnut" and sandwiching it between two acrylic disks you could turn the metala into the "vanes" of the impeller and actually pull the air/water into the eye of the impeller and through the material. would this cause better shredding of the air as you would be doing more than just using the outer faces of the material to break the air up? could this be more efficient and pull more water and air
already been there. see back to the 4-5 page of this thread. no on seems interested. though i believe that is what red dragon is doing on there mesh wheel. but its only a guess. they for sure do something similar to their needle wheels. notice the center of the needle wheel its desiged to do the same thing.
im in the process of modding this impeller.
//i169.photobucket.com/albums/u213/douggiestyle/Picture091.jpg
dudedudedude
New member
So the Matala Stuff is too thick, but perhaps a denser version of P4 could be made. I was thinking that 8 layer of enkanamt cut to the desired radius of the final impeller could be placed and pressed to 1/4 inch think in a metal mold and then subjected to heat to the point that all the layers stick to each other and retain the same shape and thickness. Essentially, it would be likes Klaus's metal loop disk but made of nylon. Any opionions on whether this would work or not?
hahnmeister
In Memoriam
And your ceramic impeller shaft hasnt shattered from being over 1000lph of air? Lol.
RichConley
New member
Creetin, that 60 scfh at 60w is the 5000 right? With a replaced impellar from what?
Sounds like a good pump for the upcoming planned skimmer.
Sounds like a good pump for the upcoming planned skimmer.
Yes Rich its the 5000, I modded the original impeller that comes with the 5000. I cut off the fan and made a new disk. I had to cut out the brass fitting so destroying the fan was nec to do so.
I left on the tension clasp as it gives a good glueing surface.
Hahn, The ceramic shaft is fine.
It didn't self destruct at 999.9 lph It lives at 1669.2 lph 
I hope i can get a venturi that gives me 80 scfh!
I left on the tension clasp as it gives a good glueing surface.
Hahn, The ceramic shaft is fine.
It didn't self destruct at 999.9 lph It lives at 1669.2 lph I hope i can get a venturi that gives me 80 scfh!
Well i tested the 2905 and its 109 watts and a power factor of 0.54 Thats with 100 scfh. Thats all under an amp. 0.91 to be exact with this pump. I am done testing this one till i am done with the 5000, But i will add more mesh to it and check her out later.
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1670 lph at 58 watts measured... that's aweful close to the claimed specs on the Red Dragon RE is using on the BK 300s. They claim 2000 lph @ 58 watts.
Sounds reachable with the right venturi.
Also sounds about perfect to max out my NW-200 and right in line with Hahn's initial estiamtes...
Sounds reachable with the right venturi.
Also sounds about perfect to max out my NW-200 and right in line with Hahn's initial estiamtes...
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