Two opposing fans with high flow rate and efficiency

CR 6300N

Ø 172 × 132 mm counter-rotating fan with large pressure increase

Compact high-performance machines (e.g., for highly integrated electronics in the fields of IT, telecommunications, network technology and renewable energy) require cool air that reliably reaches internal components requiring cooling. In some cases, conventional single fans are too weak. The cooling air specialist ebm-papst has developed the new CR 6300 N (counter rotating) for such cases. Here, two single fans connected by an intermediate piece work together to provide high efficiency with minimal space requirements. The operating noise is up to 4 dB(A) lower than for high-revving single fans. The CR 6300 N can achieve a flow rate of up to 1145 m³/h and a counter pressure of up to 1858 Pa. The counter rotating team consists of two adjustable fans of the CR 6300 N series. These rotate together in opposite directions. The rear fan can thus efficiently convert the residual twist of the front fan into output; the efficiency is greater than individual solutions. Both fans are connected by a 30-mm-wide intermediate ring, which varies depending on the application. With both 51-mm-deep fans, the total unit has a length of only about 132 mm. The fan housing made of die-cast aluminum and the wheels made of glass-fiber-reinforced PA are aerodynamically optimized for each respective direction and each weigh only 875 g. The fans and ring can be purchased as a single unit or as a kit. With 48 VDC operating voltage, the CR 6300 N is well-suited for all applications that require a particularly space-saving cooling fan and/or powerful yet highly efficient air delivery.