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DDC DC pump
THE FIRST MASS PRODUCED PUMP
FOR COMPUTER COOLING
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DC pump DDC
Application.
The Laing DDC is the world’s fi rst pump
to be used in mass produced watercooled workstations, and presents an
ideal solution for cooling processors
and electronic components using water.
Besides a lot of online coverage, the Laing
DDC is also awarded with the Innovation
Award of Baden-Württemberg, known
as one of the most innovative regions in
Germany and Europe.
Due to its size and output, the Laing DDC
can also be used in a large number of
applications.
Design.
The Laing DDC is an electronically
commutated spherical motor pump,
with an expected service life of well
over 50,000 hours at 12 Volt. The only
moving part in a spherical motor pump
is a spherically shaped rotor/ impeller
unit, which is seated on an ultrahard, wearresistant ceramic ball. The
conventional shaft, shaft bearings and
shaft seals have been eliminated. The
spherical bearing of the rotor/impeller
unit on the ceramic ball offers a number
of advantages. One such advantage is
that the occurrence of bearing play – and
the associated increase in noise – is not
possible due to the principle involved.
Consequently, the pump continues to
work quietly throughout its entire service
life. The bearing is selfrealigning.
It is lubricated directly by the medium
being pumped (wet rotor design). This
means that the pump is maintenance-free.
Since the rotor is always magnetically
held in the designated position, small
particles of dirt do not present a problem.
Under normal conditions, it is impossible
for the rotor to become locked. Reliable
starting is also ensured even after long
periods of shutdown. The permanently
magnetic rotor/impeller unit is driven
by the magnetic fi eld generated by the
surrounding stator. The stator is wrapped
entirely around the rotor.
As a result, the entire pump is only slightly
taller than the rotor itself, measuring only
38 mm in height.
Accordingly, it fi ts easily into all standard
PC cases. Generally, no separate magnetic
shielding is required. The spherical motor
design permits economical operation
with comparatively high output. Supply
voltage variation provides a simple
means of controlling the speed of the
DDC pump over a large output range.
All parts in contact with the medium are
100% corrosion resistant. With an optional
tachometer output, it is possible to
monitor the speed of the pump directly.
In many computers, the tachometer output
can be connected to a fan connector.
Pump housing
Permanent magnetic
rotor/impeller unit
Gasket
Ceramic
bearing bal
Stator
Power sup
02
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Technical Data.
Motor design Electronically commutated
spherical motor
Rated voltage 12 Volt DC
Power consumption DDC-1: max. 10 Watt
DDC-1 plus: max. 18 Watt
Voltage range 8 to 13,2 Volt*
Acceptable media Water,
Water-/Glycolc Mixtures**,
other media on request;
Max. system pressure 150 kPa (1,5 bar)
Max. system temperature 60° C
Wetted parts Stainless steel 1.4571, PPS-GF40,
EPDM gasket, Aluminium oxide,
carbon; PA6.6 GF35
Product range incl. 12 Volt
power cord (530 mm).
Available pump housings:
3/8’’ hosebarb 1/4’’ R male
*minimal start Voltage of 9 Volt necessary
* check pump performance for mixtures of 20% or
more glycol
Model Part number Connection Description
DDC-1 LH 65 00 020
DDC-1P LH 65 00 021 with AMP plug
DDC-1T LH 65 00 023 with AMP plug and tach output (750 mm) with Molex plug
3/8‘‘
hose-
barb
DDC-1 R LH 65 00 030
DDC-1 RP LH 65 00 031 with AMP plug
1/4‘‘ R male
with cable end sleeve
with cable end sleeve
DDC-1 RT LH 65 00 033 with AMP plug and tach output (750 mm) with Molex plug
DDC-1plus LH 65 00 040
DDC-1plus P LH 65 00 041 with AMP plug
3/8‘‘ hosebarb
with cable end sleeve
DDC-1plus T LH 65 00 043 with AMP plug and tach output (750 mm) with Molex plug
DDC-1plus R LH 65 00 050
DDC-1plus RP LH 65 00 051 with AMP plug
1/4‘‘R male
with cable end sleeve
DDC-1plus RT LH 65 00 053 with AMP plug and tach output (750 mm) with Molex plug
Pump curve and
dimensional drawings.
5
DDC-1plus
4
DDC-1
Pump head [m]
3
2
1
0
0 100 200 300 400 500
DDC-1plus
DDC-1
Flow rate [l/h]
20
18
16
14
12
10
Power consumption [W]
8
6
4
2
0
Product
category
7 W
03
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What can Xylem do for you?
Xylem |'zīl m|
1) The tissue in plants that brings water upward from the roots;
2) a leading global water technology company.
We’re 12,000 people unifi ed in a common purpose: creating innovative solutions to meet our world’s
water needs. Developing new technologies that will improve the way water is used, conserved, and
re-used in the future is central to our work. We move, treat, analyze, and return water to the
environment, and we help people use water effi ciently, in their homes, buildings, factories and farms. In
more than 150 countries, we have strong, long-standing relationships with customers who know us for
our powerful combination of leading product brands and applications expertise, backed by a legacy of
innovation.
For more information on how Xylem can help you, go to xyleminc.com.
LOWARA S.r.l. Unipersonale
Via Vittorio Lombardi, 14
36075 Montecchio Maggiore
Vicenza - Italy
Tel. (+39) 0444 707111
Fax (+39) 0444 492166
e-mail: [email protected]
www.lowara.com
www.completewatersystems.com
Lowara is a trademark of Xylem Inc. or one of its subsidiaries.
cod. 191008431 - P07/12
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