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High speed fans boost airflow to save space

Papst has announced the world's highest speed, 25mm deep axial fans, the 614NHH and 612NHH series.

These 60mm x 60mm, electronically commutated, external rotor fans operate at 6850 rpm, allowing them to deliver a maximum airflow of 56 m3 per hour (32.9 cubic feet per minute). This performance is comparable with that of many larger fans, making them suitable for applications where space is limited. Each fan weighs 85 grams.

The 612NHH is designed for nominal 12V dc (8 - 13.5V) operation and the 614NHH operates from a nominal 24V dc (18V - 28V) supply. Both fans feature low power consumption of 2.9 Watts and low noise at 43dB in free air. Noise is minimised by aerodynamic matching of the fan housings and impellers. Noise can be further reduced through running the fans at lower speeds by varying the supply voltage. The 614NHH and 612NHH use ball bearings for quiet operation and long life. Operating life is at least 30,000 hours at 70 °C ambient and 60,000 hours at 40 °C.

The commutation electronics of these fans is integrated into their hubs to minimise size and EMI. Standard electrical connections are via two AWG22 stripped and tinned wire, but Papst also offers a range of custom connector options.

The fans incorporate protection against overload, locked rotors and reverse polarity. Agency approvals include UL, VDE and CSA.