Fans turn both ways to boost performance

Dual, counter-rotating fans improve both airflow and static pressure compared with two axial fans used in series.

Sanyo Denki has developed the first counter-rotating fans in 60 and 80mm2 frame sizes.

The new dual, counter-rotating fans available now from EAO, are designed to improve airflow and static pressure compared with two axial fans used in series.

The San Ace 80 CR delivers a 68% higher airflow on conventionally designed fans of the same frame size: 4.53m3/min at a static pressure of 520Pa.

A 60mm2 version, the San Ace 60 CR, is also available from the same range.

This equally impressive smaller brother delivers 2.26m3/min at 550Pa - an increase of 20% airflow on conventionally designed fans of the same frame size.

The technology places two fans that rotate in counter-clockwise directions in-line on the same axial core to dramatically improve airflow and static pressure.

The advantage over a standard axial fan is the excellent improvement in airflow performance around the "knee" of an axial fan curve, with the counter rotating fans demonstrating a curve similar to that of a much larger, blower-style unit.

Each of the two fan motors have their own power input and individual pulse sensor alarm outputs for status monitoring.

Power and noise management is available through integral PWM speed control found in each fan motor.

Counter rotating fans from the San Ace range offer a long service life of 40kh at 60C.

making them suitable for servers, storage systems, power equipments, IT and telecommunication equipment.

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