Laing DDC User Manual

DDC DC pump

THE FIRST MASS PRODUCED PUMP
FOR COMPUTER COOLING

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

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