DIY Red Dragon Pumps, gathering ideas.
- Thread starter hahnmeister
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hahnmeister
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And how do you think Royal-Exclusiv makes the actual copper-coil/motor business end of the pump? They dont. They are made by Askoll for Royal Exclusiv.
Askoll... hmm... who else do they make pumps for... HAGEN! Hagen makes Laguna. Its actually been discussed before... the heart of a Red Dragon is a Laguna/Hagen Pump. RE just attaches their volute and custom impeller/shaft system.
Well... Ive done that before...
Thanks to all who have offered CNC skills. It may come to that. I think I can get most of this done via my tools, at least a prototype or something with PVC. But for the final...
Also, thanks to onetrickpony for his offer of CNC skills.
Tomorrow, I will start cracking open the 901 I have, and I will post pics.
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hahnmeister
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quangtam7, hey, you beat me to it! Thats the same pump as a 901 really, just one size larger (I think its just a slightly larger impeller thats all).
What did you use for the shroud? Do you have pics of how you made it? It looks like you are building a Klaes skimmer... nice.
Some specs man!! Please. Is that the stock impeller, or how much did you mod it? How thick is that volute (and made from what?). Any preformance results yet?
What did you use for the shroud? Do you have pics of how you made it? It looks like you are building a Klaes skimmer... nice.
Some specs man!! Please. Is that the stock impeller, or how much did you mod it? How thick is that volute (and made from what?). Any preformance results yet?
hahnmeister
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Cool... if I can end up making one cheap, the smallest RD NW pulls 1000lph, so mesh? 1200? That one only pulls 40watts though, so I and the next one up is 58 watts and does 2000lph about... I should be able to hit that. I should get at least that then. Thats pretty good considering I got those 5000/901/110 powerheads for $30 each (F&S has them for $50 each in case anyone else wants to jump in on the action).
douggiestyle
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does it need to be a laguna pump? couldnt one mod any mag driven pump, danner et al? is the idea to just increase the volute size on a low wattage pump?
hahnmeister
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You could use a Mag... I just dont know that its worth it. Mags are noisy, hot, and tend to consume alot of wattage... They do however have small volutes, cheap impellers, and the volutes are held on with screws, so a custom one may be possible.
I just think the best results are possible with the laguna/aquaclear 110, and they are pretty cheap to buy in the first place.
I just think the best results are possible with the laguna/aquaclear 110, and they are pretty cheap to buy in the first place.
douggiestyle
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so the idea is to increase the volute size on an inexpensive low wattage pump? thereby allowing an oversized mesh wheel?
hahnmeister
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You got it. See, we just dont need a high wattage pump in the first place... most needlewheels that are say... 40 watts normally are only 23-25 when running as a needle/meshwheel.
I would imagine that this laguna/110 pump, only using 65 watts at most, would use something like 40-50 watts when modded.
Stile2, are you talking about the anti-calcification loop?
hahnmeister
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Well, the anti-calcification look seems to me like another solution that RE needs to overcome a problem that they created in the first place. When I start ripping apart the 110 this afternoon Ill show why in more detail, but the loop is really there to provide cooling around the magnet to prevent deposits. The reason for this 'forced loop' is because the custom impellers use a disk around the opening that blocks off a good deal of the flow that the stock laguna has going into this area. We do not have such a problem. Worst case, yeah, I can bore out a hole for 1/4" JG... shouldnt be too hard... done crazier modding before (like removing the front half of the magnet shroud on a MJ1200 to give it an open magnet chamber).
pperez
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I found it on the net. Alot simpler to think about it is 1 lpm is equal to 2.118scfh
I used this table http://www.memflow.com/conversion.html
I used this table http://www.memflow.com/conversion.html
Horace
New member
PLEASE make sure you guys are using the correct scale. We TYPICALLY do NOT talk about air flow in LPM (Liters Per Min). We talk about air flow in LPH( Liters Per Hour) and SCFH (Square Feet Per Hour). Most of our pumps dont pump many LPM. For example a 1000lph pump (very typical these days) is only 16.6 LPM. DO NOT CONFUSE THESE PLEASE 
I went out and bought the wrong size air flow meter because everyone on this one thread were using LPM and I didnt check to be sure, and its way too big LOL.
I went out and bought the wrong size air flow meter because everyone on this one thread were using LPM and I didnt check to be sure, and its way too big LOL.
hahnmeister
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Lol... hey, there are eheims out there that are pullin in 16-18 lpm... but I agree, lph is the standard along with scfh. I use a fraction... 35scfh/1000lph. That way I can have a ratio that is easy to solve either way I want to convert. For instance, 18scfh>>> x1000 than divide by 35 = 514lph. Or, 800lph>> x35/1000 = 28scfh.
BubbleKings are rated in gph of air as well... this is confusing. Take the gph and multiply by 3.78 to get lph. A BK200 internal is rated at 264gph... so multiply by 3.78 = 997lph. Kinda low for the price, no? An eheim 1262 can burn that, and so can a ATI BM 200 with less wattage. But the BK300 internal... thats 528gph or 1996 lph of air! Thats a monster, but still, an ATI Bubblemaster 250 can get 1800 for less wattage and money.
BubbleKings are rated in gph of air as well... this is confusing. Take the gph and multiply by 3.78 to get lph. A BK200 internal is rated at 264gph... so multiply by 3.78 = 997lph. Kinda low for the price, no? An eheim 1262 can burn that, and so can a ATI BM 200 with less wattage. But the BK300 internal... thats 528gph or 1996 lph of air! Thats a monster, but still, an ATI Bubblemaster 250 can get 1800 for less wattage and money.
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