ITT Lowara is an innovative manufacturer of pumps and heat technology. We proudly deliver our pump for the first worldwide mass produced watercooled workstation. We have accepted the challenge of combining water and computer technology. The multitude of awards we have received are the witnesses of our efforts. Our pumps have also achieved a dominant position in the areas of the retrofit installation of watercooling and Casemodding or CaseCon.

Here we provide a quick insight of basic pump technology for computer cooling. Unfortunately, as a pump manufacturer we cannot provide personalized advice or sell directly to the public. You can locate in the Internet many onlinestores and forums with watercooling or CaseModding information. A short list of online stores selling Laing pumps are listed here. Please be sure to purchase only original Laing pumps. Further information can be downloaded here. Sources of supply Laing DDC Laing Ecocirc vario Typ D5

Why watercooling – why don't we go on cooling with air?
Cooling electronic devices in general are made for disbursing as much heat as possible from an electronic component in a short period of time, and to dissipate it back to the environment. Therefore, the medium used for the cooling process should than be able to take heat, to store and to dissipate heat.The heat storage ability of the element used for cooling is the determining element for the cooling process.

The heat storage ability of water is compared with air unlike higher.

The heat storage capacity is the heat's storage ability combined with the mass and the temperature difference of the used element. This attitude is the key why water is more efficient for a cooling process than air. The heat storage capacity is the amount of heat that must be loaded to an element of 1 kg mass in order to warm it for 1 Kelvin. Backwards, the medium dissipates the same amount of energy to the environment. Water owns a medium specified heat storage capacity of 1,16 Wh/(kg x K), air owns only 0,34 WH /(kg x K).

In summary, under the same conditions, water can be evaporated, transported and dissipated, more than heat in a shorter period of time than air ever could.

Another advantage of the watercooling is the silent operating and the dissipation of heat to the environment outside of the computer, while most air cooled computers dissipate the heat back to the environment inside a computer housing. Watercooled computer use a heat exchanger, combined with a fan.

Laing Circulating Pumps
The heart of liquid cooling in a computer is the circulating pump. All Laing circulating pumps used for computer cooling are wet running, normal sucking spherical motor pumps.
The spherical motor principle invented by Laing is made of 3 main elements: the pump housing (upper part), the rotor/impeller unit (only moving part), and the stator (pump motor).

The spherical shaped rotor/impeller sits on a hard ceramic bearing ball, and is driven by the electronic commutated motor in the stator. The water (or any other pumped media according to the technical datas) enters into the pump through the suction side of the pump housing. The turning rotor/impeller inside the pump increases the pressure and speed of the water, which leaves the pump through the pressure side of the pump housing.

Normal sucking pumps therefore always have to be filled completely with water. Therefore, it is ideal to install the pump always at the lowest level of the whole cooling installation. The system is therefore always completely filled with water before the circulating pump starts operating.

The self-realigning bearing is lubricated and cooled by the media. It is important not to run the pump without water.

Pump Curves
Pumps in general are qualified by two physical variables: the pump head and the flow rate. The increase of the pressure of a pumped media caused by the pump is called the pump head. The pump head and the flow rate are dependent on each other. This ratio is displayed in the pump curve. The left vertical axis displays the pump head, while the horizontal axis displays the flow rate. Additionally, there might be displayed the power consumption also, using the right vertical axis.

You may find several different units by different manufacturers for both axes. Refering to the tiny size of our pumps, its easy to realize power supply with 12 Volt inside a computer, the pressure, the flow rate and the power consumption both the Laing DDC and the D5 own outstanding benefits. Compare our pumps with pumps from any other manufacturer - therefore, you may need this converter:

Pump head
Input		m milibar bar Pa kPa PSI ft
Result		m milibar bar Pa kPa PSI ft

Flow rate
Input		mm3/s mm3/min mm3/h mm3/Tag cm/s cm3/min cm3/h cm3/day m3/s m3/min m3/h m3/day ml/s ml/min ml/h ml/day l/s l/min l/h l/day inch3/s inch3/min inch3/h inch3/Tag foot3/s foot3/min foot3/h foot3/day UK Gallon/s UK Gallon/min UK Gallon/h UK Gallon/day US Gallon/s US Gallon/min US Gallon/h US Gallon/day
Result		mm3/s mm3/min mm3/h mm3/day cm/s cm3/min cm3/h cm3/day m3/s m3/min m3/h m3/day ml/s ml/min ml/h ml/day l/s l/min l/h l/day inch3/s inch3/min inch3/h inch3/day foot3/s foot3/min foot3/h foot3/day UK Gallon/s UK Gallon/min UK Gallon/h UK Gallon/day US Gallon/s US Gallon/min US Gallon/h US Gallon/day

Length
Input		mm cm m Inch foot Yard
Result		mm cm m Inch foot Yard

Temperature
Input		°C °F °K
Result		°C °F °K