All-steel impeller is fully reversible

The Reversair is a fully reversible all-steel impeller for applications such as tunnels, where a conventional, nonreversible design would be less effective in minimising a fire hazard.

The Reversair is billed as the first fully reversible all-steel impeller for applications such as tunnels, where a conventional, nonreversible design would be less effective in minimising a fire hazard when running backwards.

Reversair is designed to exceed the requirements of the new European standard EN12101-3, classes F400 and F600, which demands fire-resistance at 400C for two hours and 600C for one hour, respectively.

The standard will apply to tunnels, underground car parks and similar installations.

The new Truflo design incorporates a specially contoured steel blade with a profile which varies along its length to produce a more uniform jet of air.

The unique, rotationally symmetrical blade form allows the impeller to deliver high efficiency in both directions.

The Reversair range will be available in diameters from 315 to 1600mm.

Apart from reversibility and high-temperature capability, Reversair has a number of advantages compared with conventional cast aluminium impellers.

As with all Truflo ranges, the impeller can be designed and custom-built to suit individual system requirements and supplied to any diameter within the range.

Blade angles can be varied to suit a wide range of applications and an asymmetric version is also available at some diameters to reduce tonal noise.

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