Water Circulation Pumps and Coolant Pumps

Keep on running. This does not necessarily apply to today’s coolant pumps which hinge their output on the operating condition and demands of the engine, thus saving fuel, and, concurrently, contributing to the preservation of the environment.

Why should an engine require maximum cooling already on starting it up after a cold wintry night? This is where electrically operated pumps come into play which run independently of the engine and supply coolant only when it is actually needed. A positive side effect: after a cold start, the car’s heating system responds more rapidly to quickly build up a comfortable climate inside.

Pierburg was the world’s first series-production supplier of an electric coolant pump to BMW. By cooling the engine only as required, fuel consumption can be reduced by two to three percent with the additional benefit of curbing emissions and friction losses.

The current development of type CWA 400 is advancing further the extension of the pump range. CWA 400 is based on the tried-and-tested principle of CWA 200, supplying more than double the hydraulic performance of the original version at the same dimensions.

For the medium capacity range, CWA 50 and CWA 100 are available. Main applications are for indirect intercooling of supercharged combustion engines. For drive concepts of hybrid and electrical vehicles, the pumps also exercise varied cooling functions such as the cooling of batteries, DC/DC converters and power electronics.

With our small bestseller, the electronically commutated water circulation pump (WCP), we have maintained market leadership since 1996. This pump is chiefly used for cooling and heating functions that are independent of the main circuit, such as heating system support, exploitation of residual heat and park heating.

Additionally, the WCP also does an indispensable cooling job on turbochargers, power electronics and exhaust gas recirculation systems. Never losing sight of tomorrow: the second-generation water recirculation pump is perfect for secondary EGR circuits, for example. It comes with all the advantages for the first generation plus an even more compact design and lower weight. Further benefits: an extended temperature range and the option of varying the hydraulic output.