400-900-50 round silencer NRF (50mm insulation), ETS NORD
€276.96 Incl. VAT
€228.89 excl. VAT
ETS NORD NRF 400-900-50 – NRF 50 round duct silencer, 900 mm in length with 50 mm sound insulation, is an essential component for ventilation systems, ensuring effective noise attenuation. Suitable for 400 mm air ducts, these mineral wool silencers provide excellent airflow performance and are used to reduce noise from various sources in ventilation systems, such as fans, heat recovery units, or terminal blocks.
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ETS NORD NRF 400-900-50 – round duct silencer with 50 mm mineral wool insulation
the ETS NORD NRF 400-900-50 is a high-performance round silencer designed for large-diameter 400 mm ventilation ducts, delivering maximum noise reduction without compromising airflow efficiency.
Engineered for demanding HVAC applications, this silencer features a 50 mm thick mineral wool sound absorption layer, a perforated galvanised steel inner tube, and a durable galvanized outer shell. Between the inner tube and insulation, a protective fabric lining prevents mineral fibre particles from entering the duct system, ensuring clean and safe airflow.
Technical information:
Connection diameter (d) Ø (mm): 400
Diameter “d1” (mm): 500
Length “L” (mm): 900
Insulation thickness (mm): 50
Weight (kg): 18.3
Fire resistance class: EI15, E60
Material: Galvanised steel sheet, mineral wool,
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