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Design features: Casing made of galvanised sheet steel,Acrylonitrile-butadiene rubber acoustic insulation(tested to BS 476: Part 6 & 7),Low noise levels,Screwed panels allow easy access to the fan,Low & Compact height profile,Easily connected to standard tubes / ductwork.
Casing: Fan casing made of galvanized sheet steel insulated with sound absorbing acrylonitrilebutadiene rubber.
Motorized impeller: The fans are fitted with 2 step motors. This allows speed adjustment by means of a simple step switch. The forward-curved centrifugal impellers are made of galvanised sheet steel. The impeller is fixed directly onto the external rotor motor and the motorised impeller unit is dynamically balanced at two planes according to G 2.5 (DIN ISO 1940). The ball bearings are maintenance free.
Performance curves: The performance curves of these fans have been established in a test chamber according to AMCA 210 and indicate the static pressure increase ΔPst as a function of the volume flow.
Sound level: The sound pressure dB(A) shown in table next page is measured at 1,5 meter from the fan casing with connected ducts on both inlet and outlet side.
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