Casing: High quality galvanized steel sheet of 0.9mm thickness (standard); up to 1.2mm for bigger sizes.
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Splitters/Baffles: “Bull-Nose” construction using high quality perforated galvanized steel sheet of 0.7mm thickness.200mm splitter width is standard.
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Acoustic Media: Inorganic ,fire resistant , vermin and moisture proof sound absorbent rock wool of 64kg/m³ or 50kg/m³density.
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Liner: Single faced to prevent the media from entering into the air stream.
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Flange: Duct mate flange of 35 mm width.
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Aerodynamically designed to ensure maximum insertion loss and minimal
npressure drop. Air-gap and length of silencer are selected to meet the required NC
nlevel.
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Sturdy construction and high noise absorbing capacity to obtain required insertion loss without compromising performance . Manufactured to ensure long and maintenance free service.
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Splitters are radiused at both ends giving a bell mouth entry-exit to minimize self generated noise and pressure loss.
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Full width splitters in the middle and half width side splitters .
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Casing construction with lock formed seams meet SMACNA standards thus providing excellent strength and rigidity .Thoroughly sealed to prevent air leakage.
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Duct mate flange connection (standard) on both ends in compliance with DW144 standards.
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Acoustic infill media is of superior quality non combustible & have fungi resistant characteristics meeting the requirements of EN ISO 1182 and ASTM C665 respectively. It has excellent noise reduction coefficient characteristics with an additional qualification of being biologically inert.
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Tested and certified by Intertek USA (NVLAP accredited laboratories) in accordance with ASTM standard E477-06a ,entitled “standard method of testing duct line material and prefabricated silencers for acoustical and airflow performance”.
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Silencer Splitter is constructed of solid and perforated metal that is located inside the silencer which protrudes into the air stream and house the acoustic media.
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Air gap is a gap between two splitters , standard available gaps are 75,100,125,150,175 & 200mm
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Bull nose is constructed as round convex shape on both side of the splitter to provide smooth airflow.
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nSound Attenuators
nOptions Available Upon Request (Non Standard)
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Flange : M.S angle frame
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Flange width : 30mm or 40mm
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Media : Fiber glass woven glass fabric as liner
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Air gap: From 50mm – 250mm to suit product requirement
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Casing Material: Stainless steel or Aluminium.
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Baffle thickness : 100mm or 300 mm
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nInstallation Guide:
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Do not place the silencer immediately after the noise source like air handler or blower in order to allow uniform flow profile to develop. Leave at least 2-5 duct diameters in the upstream and downstream of the silencer for better silencer efficiency.
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Do not expose the silencer to dirt or excess humidity while installation or during storage.
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The HVAC system should be designed meticulously for proper dehumidification and air- filtration to prevent microbial growth within the silencer and the duct system.
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It is recommended to install the silencer after the volume control damper to prevent regenerated noise.
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nProduct Order Checklist:
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Required room sound criteria.
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Airflow data for each silencer
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Duct size and maximum length available for silencer to fit in.
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Details of the air-handling units with its noise levels.
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CAD drawings with clear details of duct routing from each unit and duct- size till the first air outlet.
