DIY Red Dragon Pumps, gathering ideas.
- Thread starter hahnmeister
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KLAUS -
The superdupex 2507 has a very high pitting resistance (PREN =40), much higher than standard duplex 2205. We typically consider a PREN (pitting resistance equivalent) of >40 to be excellent for sea water applications. Duplex 2507 achieves excellent pitting resistance with substantially less alloy than hastelloy due to the addition of nitrogen. Nitrogen plays a strong role in pitting resistance without significant cost.
I suspect you bad experience was with duplex 2205.
The superdupex 2507 has a very high pitting resistance (PREN =40), much higher than standard duplex 2205. We typically consider a PREN (pitting resistance equivalent) of >40 to be excellent for sea water applications. Duplex 2507 achieves excellent pitting resistance with substantially less alloy than hastelloy due to the addition of nitrogen. Nitrogen plays a strong role in pitting resistance without significant cost.
I suspect you bad experience was with duplex 2205.
JCTewks
In Memoriam
<a href=showthread.php?s=&postid=9832013#post9832013 target=_blank>Originally posted</a> by H20ENG
Love the CNC Pics!!
Look Here at the 2905 model. Has a bigger outlet and some other goodies you can use elsewhere in the fishroom, like the strainer
I believe that is a new version of the 10000 pump
Klaus Jansen
.Registered Member
@Rishma...
i dont now, what Number we tested of Duplex-Steel... it is possible, we testing Inconel, not Duplex.. an want search the old Invoice from Steel-samples....
i foundet technical informations here, and i want tested Duplex 2205 at next time. The Europe Name of this Material is 1.4462
http://www.firebirdmetals.com/swg.html
http://www.ice-australia.com/html/duplex___titanium.html
today i testing the metallic-Threadwheels... So we push up the airintake more as 3000 Liter/h (800 gallons) waterflow 6000 Liter/h (1600 gallons) and Energyconsuption 65 watts, with standart Red Dragon Bubble King Pump. I want make pictures next days... I think, this is the future. So we want see, how long, live the Meshwheels.... the material must be without iron, otherwise it rusts and destroys themselves. Seawater is a very, very problematic material. Or, the metallic-meshwheels are the only stuff, what i think for running many years, without problems.. Plastic-Meshwheels, i think, are to soft...
@Inflames...
i love the Hurco-CNC-Machines, where come from the United States.. Best quality and word the Money...
regards...
Klaus Jansen
.Registered Member
@Creetin...
start-up problems ?
the wires are very thin, (0,1 mm) thus they have only a very small weight. A Meshwheel from HastelloyC weigths 90 % less than PE needle wheel. We can testing the Pumps with US-Voltage, i have a inverter, he make identity US-Voltage 120Volt, 60 Hz.... no problems. Are we have restarting-problems, so it is possible, reduce the diameter of the Wheels from 60 mm (Europe) to 52 mm (USA) ... the HastelloyC-Wheels are very stabilty... at next time we testing Meshwheels from Duplex2205/2207, Titanium and Stainless Steel 1.4401/1.4403
We ordert next weeks the next samples. After testing time, so we send the new impellers to CaptiveOceans for the BK400 Owners....
regards...
start-up problems ?
the wires are very thin, (0,1 mm) thus they have only a very small weight. A Meshwheel from HastelloyC weigths 90 % less than PE needle wheel. We can testing the Pumps with US-Voltage, i have a inverter, he make identity US-Voltage 120Volt, 60 Hz.... no problems. Are we have restarting-problems, so it is possible, reduce the diameter of the Wheels from 60 mm (Europe) to 52 mm (USA) ... the HastelloyC-Wheels are very stabilty... at next time we testing Meshwheels from Duplex2205/2207, Titanium and Stainless Steel 1.4401/1.4403
We ordert next weeks the next samples. After testing time, so we send the new impellers to CaptiveOceans for the BK400 Owners....
regards...
hahnmeister
In Memoriam
Klaus... 3000lph of air... is this on the same pump that with needlewheel did 1800lph of air?
Klaus Jansen
.Registered Member
@Hahn..
yes... the same standart Bubble King Pump, not the DC-Pumps.... i changed only the Impeller and the nozzle. Pictures tomorrow..
@Tanya.. good idea. Thanks....
regards...
yes... the same standart Bubble King Pump, not the DC-Pumps.... i changed only the Impeller and the nozzle. Pictures tomorrow..
@Tanya.. good idea. Thanks....
regards...
I didn't know that, I think metal i think heavy.
Good to hear you have some nice material to use for meshwheel.
Also klaus do you buy your impellors preassembled, or do you mod them? Reason is i want that brass out.
I have to 2905 and i want to use it a recirc pump.
Thanks.
It's inside the impellor. Theres an aluminum sleve that lines the id of the impellor and outside of the sleve is a nice sized brass fitting. What i don't understand is why its there. It must be there for structural reasons, But again why brass? Probably for it's anti corrosion properties from the copper, But i don't understand why not just use a stainless sleve and be done with it.
I had to pretty much destroy the impellor to get the brass fitting out.
I had to pretty much destroy the impellor to get the brass fitting out.
Klaus Jansen
.Registered Member
@spykes..
what i say : ... custom-mades Impellers for RD-Pumps. We injektion-molding the Impellers self... The brass-ring Impellers is only for ponds, the Laguna pumps are made for Ponds, not for tanks. It is not possible for remove the Impellers from the Ceramicshaft..... yor destroyed the shaft....
Thats the delivery-status from the shafts, without the carbon-bearings and without the impellers...
We using Siliziumcarbide-bearings, the best and hardest bearingsmaterial for skimmers. The Pumps are running fast dry. It is very important to switch to onouther bearings... the standart carbon-bearings for Ponds, live max. 3-6 months...
regards......
what i say : ... custom-mades Impellers for RD-Pumps. We injektion-molding the Impellers self... The brass-ring Impellers is only for ponds, the Laguna pumps are made for Ponds, not for tanks. It is not possible for remove the Impellers from the Ceramicshaft..... yor destroyed the shaft....
Thats the delivery-status from the shafts, without the carbon-bearings and without the impellers...
We using Siliziumcarbide-bearings, the best and hardest bearingsmaterial for skimmers. The Pumps are running fast dry. It is very important to switch to onouther bearings... the standart carbon-bearings for Ponds, live max. 3-6 months...
regards......
hahnmeister
In Memoriam
So the pump that normally did 1800lph of air with pinwheel was doing 3000lph with loopwheel? Im trying to figure out which pump it was that you started with to get 3000lph of air, and what that pump did with just the pinwheel.
dudedudedude
New member
Klaus,
Did you measure the wattage between the needle wheel and the loop wheel in your BK300 test?
Did you measure the wattage between the needle wheel and the loop wheel in your BK300 test?
hahnmeister
In Memoriam
Hmm.... modding the 5000 is looking pretty hard at this point... have to stick with the 901 it looks like. I wonder if the 7000 has this same brass sleeve? Or if the newere ones do as well...
Time to call Askoll and see what they can do... tell them I want to use the Laguna on a 'saltwater pond'...lol.
Time to call Askoll and see what they can do... tell them I want to use the Laguna on a 'saltwater pond'...lol.
hahnmeister
In Memoriam
Sure... $500 for impeller!
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