Impressive numbers: IWAKI 24V DC Pump
 

Hi everyone,

I just wanted to tell you about the existence of this pump, and at the same time to ask you if it would be suitable for a Watercooling rig...

http://www.iwaki.es/Biblioteca/Archi..._0045-03_I.pdf

I have learned from Iwaki website that this one is best suited for semiconductors cooling (among other uses). The figures are quite impressive:

Max Head: 10m
Max Flow : 20LPM
Operating Voltage: 14-24V
18mm connections (same as the Iwaki MD-30RZ)

Has anyone ever heard of this pump?

Sunwong :D

"output W = 40w" "power consumption W = 80w"

All depends on how it downscales at 12v, really.

Hi Etavcoda,

Yes you are right, but my point was to use it at 24V with a dedicated power supply into the external case... The figures are at MD40RZ levels... plain awesome.

Does Iwaki sell these in USA?

Regards,

Sunwong :D

Cathar mentioned that you can "special order" these at 12V... (if I'm not mixed up on Iwaki model numbers)

No these are the same ones. He was specifically talking about the 20 but they may do this for the 30 as well. He did mention that they were rediculously expensive and cathar is willing to spend money on a good pump.

I've contacted Iwaki US and HK. What they reply to me is as follow:

Iwaki HK is correct in saying the pumps are designed and marketed for large OEM use. I am sorry I cannot be any help.

Jason

-----Original Message-----
From: xxxxxxxxxxxxxxxxxx Alexwai
Sent: Tuesday, September 28, 2004 11:01 AM
To: Jason Sullivan
Subject: RE: Question on Iwaki RD-20 DC pump


But, they (Iwaki HK) claimed that even the 24 volt motor was still subject to larger minimum buys.

hope you can help me.

Thanks

----- Original Message -----
From: Jason Sullivan <JSullivan@IwakiAmerica.com>
To: xxxxxxxxx Alexwai
Sent: Tuesday, September 28, 2004 22:49:06 +0800
Subject:

Alexwai,

The RD comes standard with a 24 volt motor. Any 12 volt motor options would be custom pumps and subject to larger minimum buys.

Jason

-----Original Message-----
From: xxxxxx Alexwai
Sent: Tuesday, September 28, 2004 10:13 AM
To: Jason Sullivan
Subject: RE: Question on Iwaki RD-20 DC pump


Thanks for your reply. I 've already contacted them a few days ago. They told me that RD model is only for OEM. They don't have any available stock for sell unless I ordered a hundred or above in quantity. In fact, I am only the normal user. It is impossible for me to afford such a larger amount. That is the reason why I ask you at my first post. If you can sell me one in 12V version, I am deeply appreciated.

Thanks

Alexwai


:shrug:

So this means a no-go.. :cry: I guess this was too good to be true, but anyhow that RD30 is best of best IMO

Maybe a well-known and respectable man like Cathar may convince them to sell some units... ;)

Maybe if a company like DTek ordered a whole bunch in 12v form everyone would be uber happy.

Thing is look at cost. You can get the Aquaxtreme (MCP 600) for $80, a CSytems 2x for $84, a D4/MCP650 for $80. That pump is prolly gonna run over 2 bills at 12V even in quantity. Why do that when you can get an AC relay kit and RZT-20 for about $150 together? The only way that pump sees even close to mainstream use is if price gets down to at least the $120 range, and even then it's a stretch. I mean why buy a $120 pump unless you're running a LOT of blocks, or some very highly restrictive ones?

Noise, Heat dissipated, performance, size, aesthetics....

Sure It is not worth the bill now, but I would happily pay 120$ :D

It's worth a good deal more than that to me if it's really 20dB (or quieter). Quiet is hard.

Okay, maybe I should have rephrased. What I'm getting at is what kind of demand is really going to be out there? Not in terms of people who could actually use it, but with people who can rationalize the cost. Yes, there are a lot of people out there who have setups that suit using pumps like the 20/30-rzs and things in that category, but for half the price to get say 75% of the performance what are most going to buy? An MCP-600 has approximately 6 ft. of head there, so even with an MCW6000, MCW50 and MCW-20 it would be getting well over a gal/min. For many it isn't totally a quality issue, and I don't think there are enough out there to create a sufficient market demand.

If you can get a group buy going, mark me down for one. Now there are only 98 more to go. But seriously I would be very willing.

97 actually, Bob has already expressed his interest as well ;)

Don't know in the US, but in Europe the picture is different... Basically resellers are probably self-convinced that we (the WC addicts) are rich... :mad: Then, if an Iwaki MD20 cost 180 € and two D4's in series will cost 200€, my choice is only concerned by ease of use. Price is not an issue nor performance / noise / etc (the Iwaki will be better in any case)

Regarding the RD30, this beast is at MD40RZ performance level, which seems a huge quantum leap to me from what you can get from any current 12VDC pump on the market. It is basically to protect your investment during the product lifetime (I am sure you will not need to change your pump until it breaks apart and even then, It is an Iwaki, It can be repaired)

I do agree however that the pump is vastly overpriced and that It won't have any demand at those price levels... But make it go under 200$ and we'll see... ;)

The funny thing is, given that restrictive loops and a focus on quiet are both common in Europe, this pump (if it performs to spec - I've never actually seen one) should be the exact pump they want (erm... well, except about the price, of course...)

You are right, Bob....

I never opted for German style, however. Nice finish on parts but poor performance in most situations. They even refuse to make 1/2'' specific fittings :shrug:

...the only thing they do to improve cooling is using american BIX or heater cores... This is even funnier than the pumps :)

You know, I was really against this pump (the RD-20, the -05H would be great, but it's not meant for continous duty :( ) on a price/performance basis. I didn't really think that the higher flowrates possible would justify it. However, the more I think about it, the more that this pump would make sense even at $200.

1. A 30RZ+relay would run you about $150 or so depending on your deal finding abilities.

2. Restrictive blocks are becoming more popular.

3. Most people seem to be more willing to upgrade a WB than a pump.

Take the last two into consideration and what it comes down to is you can spend ~$100 after shipping on a pump now, but there's a good probability that your next block is going to be more restrictive. How many more development cycles until we actually need 20-30 ft. of head? I'm not saying it's going to be anytime soon, but it may come, especially as GPUs wind up with higher transistor counts, cooling multiple components with a single loop could very well become more troublesome. If that's the case, it would begin to make sense to just spend the money on your pump and be able to know that in two years you could still use it. Then again, that whole argument is based on supposition so I wouldn't be surprised if I get proven wrong either hehe.

And it's also cool to say I have the uberpump. But only if you have that NAZ1 block.

The Iwaki RD30*** was quoted to me by my local distributor for $275 plus tax and freight. I found another source with a surplus one that he sold me for $115.

nikshub found on on ebay for $115 grrr... I woulda bid on it, but he found it first so I let it go figuring it would go to a good home. I'm not too upset because I found a place with the US motored RZ20s for $125.

these 12-24 volt iwakis seem like a good idea in theory. I wonder how big they are? (too lazy to look at spec shet again).

But i still and always will love my wmd-20. it may be the american version, but i love it anyway.

considering the MD30RZ typically goes for $200US, this 12v item would price accordingly above that.... don't think so

& I found my MD-30RZ on ebay for $64US.....cheaper than my mcp-650 - (which died in 2 months) while the Iwaki still runs 24/7 for 18 months now.

Guys, the guy who I got my RD-30 from claims he has a lot of 6... so 5 more is my guess. They are quite elegant pumps, I disassembled the one I got as soon as it arrived, however, one of the mounting tabs was broken, so I will be getting a replacement. A dedicated PSU is a must, I have a 240W 24v 10A Meanwell on it's way. I spoke to Iwaki, they claim the pump is 56dBa! Somehow I doubt that, I think the spec sheet says 40dBa. This thing is roughly 4.5" in every direction, the fixed barbs seem to be about 5/8" OD and 1/2" ID. The casing is aluminum but the water only touches plastic and ceramic. I am waiting to hear back from this guy re more pumps and a price, so if you are interested, let me know and when I find out a price from this guy, I'll let you know.

I was interested in that pump u bid on but being one of the larger model rd pumps I wasnt interested. Glad u won the auction. Id like to get one of the smaller rd models as they look perfect for water cooling.

I bought an RD 15 from a guy in Paducah KT (via ebay). He mentioned that he had a line on a couple of R20Zs. I'd asked him to let me know when they went to auction so I could notify folks here...
If you want to check, here's a link to ebay's view seller's other items for him (it's currently empty).
Bob

nikhsub1

Don't tell me the guy in you contacted has RD20 cos I got mine for USD275. :mad: