Question how does double the pumps double the head? If they are in series? I can see where you could enhance flow with double pumps and a few wye's.
-Brandon
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Question how does double the pumps double the head? If they are in series? I can see where you could enhance flow with double pumps and a few wye's.
-Brandon
yasou, it will double the head. it will work just fine afaik. it will help out quite a bit i thinjk as the l30 and 35 are low head pumps
brandon, in series it doesnt increase max flow, but doubles the pressure. not sure how exactly to explain the way it works though. double pressure = double head. the first pump gives backpressure on teh second pump which helps the second pump perform better. thats one way of looking at it. so instead of having negative ressure around the pump inlet it has high positive pressure. i hope that makes sense.
if you put them in parallel it doubles the max flow but leaves head pressure the same.
think of it this way.. you have two cars... with two cars each of which are 200hp you can cary 2X amount of weight combined between them. they can move at 100mph while carying 2X weight. That is parallel...
series is this. you have those two cars put into one car both of their engines are in one car. so you have 400hp in one car, but the car can only cary X weight due to the size of the car. but the good part is that the car can cary X weight to 200mph now..
i hope that lame anology makes it easier to understand.
Thanks Maxx...
Since my Hydors only have a head of ~75" would you say I needed to put them in series to make a 7' circuiot flow well huh? See here's my delima Ive got the 2 hydors ready to go in an external config mentioned in another thread. However I've also got an Iwaki wmd-30RLZT thats been tested and is just begging for a new home. damn I hate thinking about this crap!
-Brandon
I would think that two pumps in series would increase flow because of the increase in head capabilities. With zero head you get 450gph and with a foot of head you get something lower like 400gph. Now increasing the amount of head these pumps can handle would seem to get you somwhere between 400gph and 450gph, but higher than 400gph. Does this make since?
I'm going to test these pumps in series and maybe in parallel too. I will write back this weekend.
absolutely no point in parallel. the only time parallel would be a good idea is if the pumps have atleast 15 feet of head.
here is the perfect pump. 24feet of head, less than 20watt heat dump (preferably under 10), 12volt powered, and something like a max gpm of like 7gpm.
bandon, if your going to use hte md30 you need ALOT of rad power.. it dumps alot of heat into the system. to really get rid of all of the heat you will need 2-392 heatercores. otherwise the heat dump from it will cause you to loose alot of performance.
MaxxxRacer what do you know about the heat dump with a L30 and L35 hooked up in series. I have a Dual 120mm Black Ice Extreme ProII Rad with 4 high speed Panaflos in a push-pull configuration, but I like to keep the noise down so I run the fans at like 6-7v. Will these two pumps overwhelm my Rad? Sorry for the rediculus question, but if you could help thanks!
well hte l30 and l35 are low heat dump so it should be ok... btw why do u run two of them instead of one 2x120mm rad? having two of those makes you have twice hte fittings and more tubing which equals less resistance. but if you cant fit it i understand
you really dont need to have the fans that high or even have them in push pull.. just have them on pull config and only use two fans. you shouldnt see much of a performance drop at all and ur noise levels will go down.
not a rediculous question btw.
I didn't mean two rads. sorry. I just have one. I'll try two pumps later if I have time then I'll let you know how it works. The only thing I'm worried about is that the pump accepts 3/8 ID tubing and it has to go in to the fitting. On my L35 I have 1/2 ID tubing that slid over the fitting and it works fine that way.
well let us know how it works out.
while trying to convert 3/8 to 1/2 on the hydor L30 I found out that the push on connection used for the waterchill set up seriously restrict flow. Tommorow I'll go to the store to get better fittings then I'll both pumps running. Peace!
Well I hooked both pumps in series and it did increase the flow. I can tell just by looking at the turbulance in the resevoir. The temperature decreased by 1c but my overclock isn't stable anymore. Does anybody know what could cause this? Could it be EMF? Any suggestions?
no idea.. sometimes a little bit of temp improvement wont help overclock.. seeing as how ur on intel it should help more than amd.. this is considering ur on a flamming hot pressy..
Who knows, this overclocking experiance has been rough. I've been through two processors and two mobos. I had to learn to solder and do mods now I'm learning everthing there is to know about cooling. I've taken apart my computer like 100 times. Its like a bad crack addiction, but I like it.
yes it is like a bad crack addiction.. evil stuff these computers are.
Not to get of the subject or anything, but whats a normal delta between water and core temp.
Can anybody estimate how much head would be in a system with a RBX block a MAZE4 block and a Black Ice extreme ProII
for what flow rate?? to get good flow rates you want around 15feet of head.
Which one is better for dual pump setups?
2X 50Z, or 2X MCP350 (modded)?
Here is an email sent to me form Iwaki about the RD-30 this might help somebody. I don't think this is the pump for me.
Estimated life on an RD-30 running continuously is 29,000 - 36,000 hrs (based on testing with ambient temperature water).
Temperature rise of pumped fluid will depend on operating point and physical properties of fluid. We have not done any specific testing to establish an average, but it is logical that there would be some heat input form the radial and axial bearings as well as from the motor. Are you pumping a temperature sensitive fluid?
The RD-30 at 24V DC has a rated current of 3.2 Amps, starting current of 10 Amps. We have not done any hydraulic or overall efficiency ratings of the pumps.
If you have any other questions on this information, or an application you would like us to review, please let us know.
Regards,
Peter Brule
This is not quite true:Quote:
Originally Posted by MaxxxRacer
The DDC @12V has 13' of head, @13.5V it has 14.5' of head.
The 50z @12v has 10.5' of head, overvolted I don't know.
To find the best performing pump for your system... study the pumps' PQ curve against the other.
The truth is out there....
(I miss the XFiles!)
wang that was written before the DDC even existed.. but thanks for pointing it out...
and overvolting the DDC has been known to kill it...
wow iwaki rules.. ive never seen such a inquisitive email from a company.. btw that pump rules.. but uber expensive.
Ummm, ok WTF??? How can you spout untruths like that?Quote:
Originally Posted by MaxxxRacer
Why is it ok to overvolt the 50Z then?
Laing themselves have the pump running at over13v in thier PQ chart!!
So unless you know "more" about the pump than Laing themselves......
I don't know why you posted that.....
IF of course you have proof.... please post it.
I also value this forum as much as any other in the water biz.
Please try and be unbiased.
Thanx.
this is coming from several users at procooling. i know its rated for 13volts. but several users had reported that overvolting ther DDC had killed it. just relaying reports...
I visit Procooling and never noticed those posts.... links?Quote:
Originally Posted by MaxxxRacer
Straight from Laing's site: http://www.lainginc.com/DDC_Series.htm
Voltage Range: 8 to 13.2 VDC
Starting Voltage: 9 to 13.2 VDC
So, unless there's substantiated evidence.. I believe that comment was/is an irresponsible spreading of "factual" info.
Think of the "new to watercooling" reading such info.. and going away with perhaps a flawed picture of a fine piece of hardware.
As you can see, I have a hard time with FUD... nothing against you Maxxx.