any good 12v pumps - Page 2

Since87 · 11-20-2003, 12:10 PM

Quote:

Originally posted by Turbokeu
Since I have a flowrate of 4.4LPM in my actual setup with a Eheim 1250 (corresponding to a head of 1.8m), with a Johnson CO30 or CM30 in the same setup I should have a theoretical flowrate of more than 20 LPM (following the P-Q curves of both pumps).

Numbers seem a bit off to me.

If you are getting a 1.8m dP with an Eheim 1250, I'd predict something like 3.3m dP and 5.5 lpm with the CM30. Don't forget that the pressure differential across the cooling system typically increases proportional to the flowrate squared.

Turbokeu · 11-20-2003, 12:59 PM

Quote:

Originally posted by Since87
Numbers seem a bit off to me.

If you are getting a 1.8m dP with an Eheim 1250, I'd predict something like 3.3m dP and 5.5 lpm with the CM30. Don't forget that the pressure differential across the cooling system typically increases proportional to the flowrate squared.

You're right of course, I knew there was a pressure differential increase, but I forgot it was squared to the flowrate...

The only way to know for sure is to mount the CO30 in my actual cooling loop and measure the flowrate through my Swissflow flowsensor.

CD

murray13 · 11-20-2003, 02:57 PM

Quote:

Originally posted by WAJ_UK
I have come across these http://www.chrystella.co.uk/acatalo...t_DC_PUMPS.html

No idea what they are like though, I can't find any detailed info on product life

Here you go: PDF Link

They don't run for very long. 75 to 500 hours depending on model. Their brushless does not have very good pressure/flow specs.

fhorst · 11-20-2003, 06:09 PM

75 hours? Are they out of their @%@#% mind!
And still ask 75 euros for it....

Well, there goes another promising pump....

Just an short question (but a bit of a long answer I’m afraid)
What is the difference between an impeller and a centrifugal pump?
An impeller seems to be capable to provide a lot more pressure, but how?

WAJ_UK · 11-21-2003, 03:12 AM

cheers for the pdf file. There not much good are they, it's a shame the suitable 12v pumps are so pricey

decodeddiesel · 11-21-2003, 01:17 PM

Does anyone have any data on eheim 12v DC pumps? Mainly I am looking at power usage compaired to the AC versions.

grimjaw · 11-21-2003, 02:31 PM

Aquaflow Pump 12V, 6A, MK3 (Reference 07700)
Continuously rated, quiet and compact. Must be primed by gravity or by an auxiliary manual pump. Can be mounted horizontally or vertically with pump head down. Flow: In excess of 4 galls/minute • Pressure: In excess of 15 psi • Size: 6.2" L x 2.4" H x 4.7" across ports • Head: 45ft (13.72m) • Weight: 1 1/2lb (0.68kg) • Ports: Accept 1/2" (13mm) I.D. hose at inlet and outlet

Turbokeu · 11-22-2003, 12:38 AM

Quote:

Originally posted by decodeddiesel
Does anyone have any data on eheim 12v DC pumps? Mainly I am looking at power usage compaired to the AC versions.

AFAIK there is only one 12V Eheim pump:
It's a 1046 equipped with a microprocessor controlled 12VDC to 220VAC-50Hz converter, drawing 5 Watts.

The converter is not made by Eheim, and can be mounted afterwards to any standard 220V-50Hz 1046 pump.
See here.

CD

fhorst · 11-22-2003, 04:54 PM

Quote:

Originally posted by grimjaw
Aquaflow Pump 12V, 6A, MK3 (Reference 07700)
Continuously rated, quiet and compact. Must be primed by gravity or by an auxiliary manual pump. Can be mounted horizontally or vertically with pump head down. Flow: In excess of 4 galls/minute • Pressure: In excess of 15 psi • Size: 6.2" L x 2.4" H x 4.7" across ports • Head: 45ft (13.72m) • Weight: 1 1/2lb (0.68kg) • Ports: Accept 1/2" (13mm) I.D. hose at inlet and outlet

Looks good, but I did not see anyone jet trying to use those types of pumps. I don't know why.

I tries to find some specs, but was unable to find them.

HMB · 11-22-2003, 05:49 PM

I ordered myself an Iwaki MD20RZM yesterday. High head model

Hope it will work out OK

decodeddiesel · 11-23-2003, 02:42 AM

Thanks Turbokeu, interesting to see it only draws 5 watts. BTW, been following your work for some time now, like 2 years or so and I got to say you do some great stuff. I must say you have done by far the best work with a lian li case I have ever seen.

Turbokeu · 11-24-2003, 05:26 AM

Quote:

Originally posted by decodeddiesel
Thanks Turbokeu, interesting to see it only draws 5 watts. BTW, been following your work for some time now, like 2 years or so and I got to say you do some great stuff. I must say you have done by far the best work with a lian li case I have ever seen.

Thanks DD...

Remember also that the 1046 only does 300LPM/79GPM.

CD

fhorst · 11-24-2003, 09:50 AM

Any news on someone using this type of pumps?

Quote:

Originally posted by grimjaw
Aquaflow Pump 12V, 6A, MK3 (Reference 07700)
Continuously rated, quiet and compact. Must be primed by gravity or by an auxiliary manual pump. Can be mounted horizontally or vertically with pump head down. Flow: In excess of 4 galls/minute • Pressure: In excess of 15 psi • Size: 6.2" L x 2.4" H x 4.7" across ports • Head: 45ft (13.72m) • Weight: 1 1/2lb (0.68kg) • Ports: Accept 1/2" (13mm) I.D. hose at inlet and outlet

Turbokeu · 11-24-2003, 12:08 PM

Quote:

Originally posted by fhorst
Any news on someone using this type of pumps?

I don't but I would be surprised that these pumps (Reference 07700 and 07600) are really for continuous (24h/day) use.
What scares me most is the current draw: 6 and 7 Amps, thats 72 and 84Watts...

CD

Maximilium · 11-25-2003, 01:37 AM

my first test

fhorst · 11-25-2003, 03:12 AM

Well.... How is it working?

Any noise? How is the flow rate?
How is the pump compared to the "cheap" one from surplus?

Is this "the pump" that can be used no matter what you throw at it? (multiple high restriction blocks, long tubing etc)

Is it worth the money?...

Maximilium · 11-25-2003, 09:17 AM

flow= 4gpm
noise= 1/2 of the noise compared to the cheap pump, is actualy less noise compared to my cpu fan @ 49dB

You can use 3/8-18 NPT tab on it like i did to conect 3/8 NPT fittings to it, but you need to be realy carefull!

Time will say if is worth the money, it fit nice inside my case, i conected 1/2 OD tubing fittings, conected to my reservor, put some water on it and conected to the power suply of my computer (12v). i tested the pump for like 30 min without no problems, no leaks.

i let you know how it handles as soon i start my next project (must get second moratge aproved first

)

11-20-2003, 06:09 PM	#29
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	75 hours? Are they out of their @%@#% mind! And still ask 75 euros for it.... Well, there goes another promising pump.... Just an short question (but a bit of a long answer I’m afraid) What is the difference between an impeller and a centrifugal pump? An impeller seems to be capable to provide a lot more pressure, but how? __________________ If it get's hot, it needs to be watercooled!

11-21-2003, 01:17 PM	#31
decodeddiesel Cooling Savant Join Date: Oct 2001 Location: classified Posts: 534	Does anyone have any data on eheim 12v DC pumps? Mainly I am looking at power usage compaired to the AC versions. __________________ ...i hurt... do me a favor, disconect me... they can re-work me but i'll never be top of the line again ...i'd rather be nothing...

11-22-2003, 05:49 PM	#35
HMB Cooling Neophyte Join Date: Aug 2002 Location: Sweden Posts: 63	I ordered myself an Iwaki MD20RZM yesterday. High head model Hope it will work out OK __________________ Asus A7N8X Deluxe, 2500+@2700MHz (13,5x200), 2x256MB TwinMOS pc3200 @ 2-2-2-11, GFFX 5900 Ultra@500/950MHz, 2x120GB Maxtor Diamondmax 9 8MB SATA raid-0, Prometeia, Logitech z-680. 20000+ 3Dmark2001 Duron 600@1521MHz RIP

11-23-2003, 02:42 AM	#36
decodeddiesel Cooling Savant Join Date: Oct 2001 Location: classified Posts: 534	Thanks Turbokeu, interesting to see it only draws 5 watts. BTW, been following your work for some time now, like 2 years or so and I got to say you do some great stuff. I must say you have done by far the best work with a lian li case I have ever seen. __________________ ...i hurt... do me a favor, disconect me... they can re-work me but i'll never be top of the line again ...i'd rather be nothing...

11-25-2003, 01:37 AM	#40
Maximilium Cooling Neophyte Join Date: Nov 2003 Location: U.S.A. Posts: 68	got my pump today! my first test

11-21-2003, 03:12 AM	#30
WAJ_UK Cooling Savant Join Date: Oct 2003 Location: Sussex Posts: 109	cheers for the pdf file. There not much good are they, it's a shame the suitable 12v pumps are so pricey

11-21-2003, 02:31 PM	#32
grimjaw Cooling Neophyte Join Date: May 2003 Location: USA Posts: 8	Aquaflow Pump 12V, 6A, MK3 (Reference 07700) Continuously rated, quiet and compact. Must be primed by gravity or by an auxiliary manual pump. Can be mounted horizontally or vertically with pump head down. Flow: In excess of 4 galls/minute • Pressure: In excess of 15 psi • Size: 6.2" L x 2.4" H x 4.7" across ports • Head: 45ft (13.72m) • Weight: 1 1/2lb (0.68kg) • Ports: Accept 1/2" (13mm) I.D. hose at inlet and outlet

11-25-2003, 03:12 AM	#41
fhorst Cooling Savant Join Date: Oct 2003 Location: Almere, The Netherlands (Europe) Posts: 262	Well.... How is it working? Any noise? How is the flow rate? How is the pump compared to the "cheap" one from surplus? Is this "the pump" that can be used no matter what you throw at it? (multiple high restriction blocks, long tubing etc) Is it worth the money?... __________________ If it get's hot, it needs to be watercooled!

11-25-2003, 09:17 AM	#42
Maximilium Cooling Neophyte Join Date: Nov 2003 Location: U.S.A. Posts: 68	flow= 4gpm noise= 1/2 of the noise compared to the cheap pump, is actualy less noise compared to my cpu fan @ 49dB You can use 3/8-18 NPT tab on it like i did to conect 3/8 NPT fittings to it, but you need to be realy carefull! Time will say if is worth the money, it fit nice inside my case, i conected 1/2 OD tubing fittings, conected to my reservor, put some water on it and conected to the power suply of my computer (12v). i tested the pump for like 30 min without no problems, no leaks. i let you know how it handles as soon i start my next project (must get second moratge aproved first )

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