New Laing 12VDC pump: the DDC
 

While browsing I "felt" onto Laing 's website where they present a new DC pump: the DDC series.

Not as powerfull as the DD4 but almost as small (2.5") as the C-Systems CSP-750 pump (2"), and only 1.5" thick.
Maximum flow at 0" head is specified for 400LPM (about 105GPH) @13.5V, but more important is the maximum head: almost 15 feet (about 4.5 meter).

Power consumption is between 8.5 and 10.5 Watts and MTBF is 50000h.
A version with a liquid volume compensator is also available.

http://www.lainginc.com

CD :)

WTH is a liquid volume compensator?

As I can understand from Laing's exploded view of the DDC (springs-pressure plate-diaphragm), it should be a kind of pressure stabilizer or volume stabilizer for volume or pressure changes due to temperature changes of the pumped liquid...(interesting for pressurized closed loops)

CD :)

we can put them on THE site, (and will try to do so next week ?)
note: premium price for a premium product

Wow that's fast! :eek:

CD :D

been sitting on my shelf for a while, I thought the announcment was to be in Sept.

what are your impressions of it Bill? Have you actually run it? What about putting two in series ala csystems pumps?

Oh so this was the one that you referred to earlier... Seems pretty nice. Not quite what I'd expected, but this is a much better shape.

I think that putting two in series would be a bit of a hassle seeing as the barb config is what it is.

Edit: It's disappeared from Liang's site quite quickly.

15 PSI, hey-o

listen please:
what are the reasons to use 2 small pumps instead of one larger unit ?
substitute fan for pump in above

Parallel maybe because of the lower flow but with 15' of head dont think would need series tho.

page will be back up after announcment next week
sharp eye there Turbokeu

FYI page didnt disappear :-) the link did, if you are smart enough you will find it.

look likes like a sweet little pump, makes me think twice about the c750's i bought.

I was under the impression that putting two smaller in series could give the power of a single larger but having two would have the added benifit of a failsafe. I know my system would be hot as heck running the one (if the other failed) but in much better shape then if the single large pump were to die. I guess i was mistaken. :shrug:

Approaching the fifties, my eyes are not anymore what they were when I was twenty , but I'm doing my best... ;)

Damned glasses...:rolleyes:

CD :)

Redundancy

redundancy is good, when/if the units are prone to failure
adding the second unit then increases the chance of one of them still operating after the other has failed

would not a single pump of higher reliability be advantageous ?

fritol88
you are looking at the difference between DIY and an engineered solution

As you say... ;)

CD :)

Generally two small pumps takes up more room or puts out less performance, and costs more, than a larger pump...

Would not TWO pumps of higher reliabilty be more useful? I don't really care, I guess, as I really don't need 50,000 hours as it is...

http://www.lainginc.com/DDC_Series.htm

Looks like a nice pump. I want to get one of these and some new fans and I be set.
Anyone else notice the title of that page?

does anyone (else) know where this pump is used ?

What makes it a premium product compared to the new D4? The compensator looks like it pushes the stator and rotor up into the pump housing. What is the function of the compensator for water cooling loops?

I would imagine the size/performance ratio. Seems to have very nice curves and a tiny footprint.

What I find odd is that the curves and performance figures are all shown as at 13.5v, rather than the 12v for our needs.

This makes me suspect that the pump was originally designed for some sort of automotive/marine application, where 13.5-13.8v is the standard alternator car voltage. Perhaps it's a coolant booster pump? Perhaps it's a marine environment water-system pump for supplying water for a boat's domestic water supply? The springs would seem to suggest that this could be the case to deal with the "shocks" of taps being opened/closed quickly.

yup, and a bona fide 50,000 MTBF
and that compensator is an externally pressurized reservoir for makeup fluid lost due to the permeability of connections
-> the 3 year system !

so where is it ?

no Cathar, it was designed for its initial application - with more similar apps to follow I presume