Another interesting pump 12V dc

BeerHunter · Jan 22, 2004

It's called laing made in germany I think.

http://www.oberread.com/laing.htm

Maximum power required:
D2 7 Watts
D3 11 Watts
D4 16 Watts

Here are some performance curves:

anvil82 · Jan 22, 2004

What is D2, D3, D4?

The part numbers on the site are, SM-303, SM-909, SM-1212.

Cathar · Jan 22, 2004

anvil82 said:
What is D2, D3, D4?

The part numbers on the site are, SM-303, SM-909, SM-1212.

http://www.oberread.com/laing_new_d4_page.htm

neilmon2 · Jan 22, 2004

How much?

Cathar · Jan 22, 2004

neilmon2 said:
How much?

Speaking to them on the phone now.

$95US for the D4

Need to talk to Laing Thermotech directly. (619) 575 7466.

Ask for "Mike".

Getting information from him now. Pumps are continuous duty with ~50000hr MTBF

14W current draw for the D4 under load

4"x4"x4" in size.

9mmCensor · Jan 22, 2004

Humm thats about 2084 days (5.7 years), how long do normal AC pumps last for?

Graystar · Jan 22, 2004

I believe Laing makes the Velocity line of pumps for Custom Sealife.

BeerHunter · Jan 22, 2004

Excellent info Cathar. When you get the specs don't forget to ask about dB. The same company if found these Laings sells Iwaki RD/24VDC series which are inaudiable at 20dB but they are expensive as gold. Plus they are 24 volts and most power supplies will not support that load because the -12V rail is only designed for between 0.5A-2.0A.

http://www.oberread.com/IW_RD_Series.htm

found404 · Jan 22, 2004

From the graph aren't the specs of the d4 similar the mcp600 but it draws more watts and costs more? Or have i got the wrong impression?
They do seem to have a great rated life though.

Cathar · Jan 22, 2004

9mmCensor said:
Humm thats about 2084 days (5.7 years), how long do normal AC pumps last for?

Warranteed for 2 years typically. Anything after that is "grace".

A 50000hr MTBF falls into the same life-span category as a decent AC motor. Basically it could last longer, or it may not last as long, but the same applies to AC motors too.

ILikeMy240sx · Jan 22, 2004

IMO, MCP600 might be a better choice than that D4...

Any idea how long a MCP600 would last?

Cathar · Jan 22, 2004

found404 said:
From the graph aren't the specs of the d4 similar the mcp600 but it draws more watts and costs more? Or have i got the wrong impression?

D4 - peak head 11ft, 6.3GPM peak flow
MCP600 - peak head 10.5ft, 3.0GPM peak flow

What I find is more important is flow rate at a certain pressure head.

I like to target 1.5-2GPM for my setups.

@1.5GPM - MCP600/7' head, D4/9' head
@2.0GPM - MCP600/5' head, D4/8' head

The D4 is providing higher pressure with its 14W power draw.

geoffman · Jan 22, 2004

ILikeMy240sx, the Swiftys have a nominated MTBF of 10,000 hr.

Cathar · Jan 22, 2004

ILikeMy240sx said:
IMO, MCP600 might be a better choice than that D4...

Any idea how long a MCP600 would last?

10000hr bearing MTBF listed at the MCP600 OEM website. (see Page 12). Swiftech have a custom high-pressure head variant of that pump, whether or not the bearing life-span is different as a result, I am not sure.

BeerHunter · Jan 22, 2004

Cather did they say anything about noise?

BeerHunter · Jan 22, 2004

found404 said:
From the graph aren't the specs of the d4 similar the mcp600 but it draws more watts and costs more? Or have i got the wrong impression?
They do seem to have a great rated life though.

In my reading of the graph the D4 seems to have superior performance at every interval.

http://www.procooling.com/articles/html/pump_comparison__-_phaestus__1.php

Cathar · Jan 22, 2004

BeerHunter said:
In my reading of the graph the D4 seems to have superior performance at every interval.

http://www.procooling.com/articles/html/pump_comparison__-_phaestus__1.php

The D4 is the near performance equivalent of the Danner Mag 3. I plotted the PQ curve and the two pumps are extremely similar, being within 5% of each other at various points on the PQ curve right from 0-5.5GPM. The D4 provides slightly more pressure than the Mag3 down low, but slightly less pressure/top-end flow but that's in the realm that no one ever sees anyway.

So basically we're looking at the size and performance equivalent of a Danner Mag 3, but in a 12VDC format with life-span to match.

Being a centrifugal DC brushless motor, I would imagine that the pump would be very quiet, just like every other pump of that type.

BeerHunter · Jan 22, 2004

You plot wrong.

At 10 Head Feet:
MCP-600 delivers-20 GPH
D4 delivers- 40 GPH
Mag3- n/a

At 8 Head Feet:
MCP-600 delivers-47 GPH
D4 delivers- 120 GPH
Mag3- 50 GPH

At 6 Head Feet
MCP-600 delivers-110 GPH
D4 delivers- 195 GPH
Mag3- 180 GPH

If I had website I'd link excel file for you but please recheck your numbers. There is some interpolation of points though..I'm sure that's where the error lies.

Cathar · Jan 22, 2004

BeerHunter said:
You plot wrong.

Nope.

Here's my plot for the Mag3, plus other pumps. The Mag3 data jumps all over the place, clearly due to rounding of values. Here's my attempt to smooth the data. Note that the Mag3 does have a 10.5' peak head.

Link to graph

Edit: Fixed graph link.

BeerHunter · Jan 22, 2004

Where are you getting this data? and why is'nt the d4 incorporated into your graph?

Here is the data I'm using. http://www.procooling.com/articles/assets/images/ph-pc-pqcurves.gif

And unless it's inaccurate the d4 smokes all the other pumps using thier numbers above.

Another interesting pump 12V dc

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