Fans by Fantech Electronic Catalogue

2016

Figure 1.2. - Turning vanes at sharp bends

Fit turning vanes in elbows adjacent to axial fans

Eccentric flow conditions at both inlet and outlet will result in

part of the impeller being starved of air and the fan not

operating satisfactorily.

Square-to-round transitions and turning vanes in elbows assists

uniform airflow; this is a compromise only and by no means

ideal.

1.0 AXIAL FANS

Figure 1.1. - Inlet Cones

Use inlet cones for axial fan free air intakes to improve performance and noise level.

An abrupt entry will generate turbulence at the impeller. Note

blade tips will be starved of air which reduces pressure

development capability, induces stall and increase the noise

level generated by the fan.

By fitting a correctly designed inlet cone the air flow to the

impeller will be uniform resulting in the performance being

optimised and minimum noise level generated.

INSTALLATION DO’S AND DON’TS

P-2