Industrial Noise & Vibration Centre

+44 1753 698 800

Scrap Fan Noise Reduction – occupational and environmental in one

Scrap extract fan noise reduction

Attenuators do not take kindly to the passage of scrap – which is a problem when installing noisy chopper fans. Our cutting edge aerodynamic modifications, however, are even robust enough to be able to cope with extreme scrap metal. In this example, both occupational and environmental noise problems were simultaneously solved at source. Three sets of chopper fans are used to pull-off scrap cans from the lines and to shred them for recycling. These generated high levels of tonal noise, causing both occupational and environmental noise problems. Instead of fitting conventional fan attenuators, acoustic enclosures and noise lagging at a potential cost of £30k or more, our Quiet Fan technology was fitted to the fans in a matter of hours to give an overall noise reduction of 22dB(A) at an installed cost of c £1000/line – a capital cost saving of 90% and with no effect on fan performance or efficiency.

Unlike fan silencers, the modifications are unaffected by the passage of scrap cans and will last the lifetime of the fans without maintenance – and at less than 1% of the previous noise level…