According to the different structures of fan import and export, fan muffler is divided into circular structure and rectangular structure.
(1) Circular structure is divided into two types: A and B. A type is flanged at both ends and directly connected to the pipeline (i.e. pipeline muffler); B type is flanged at one end and directly emptied to the atmosphere at the other end (rain-proof cap can be installed), and it is only for setting up at the end of the outdoor pipeline and inlet of the closed machine room.
(2) The general thickness of resistance muffler in the circular structure is 100 mm, 150 mm, muffling amount 15-30dB, under the condition of wind speed 5-12m/s, the applicable air volume is 1000-50000 m3/h. The structure of high frequency noise and low frequency noise muffling adopts two kinds of muffling area of impedance, which is used to maximize the broadening of muffling frequency band.
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E-mail:bonnie@yh-acoustics.com
Product details description
Industrial silencer control airborne noise from ducts and openings in buildings, enclosures or equipment. It’s also the first choice of noise control measures for entrances and exits in noisy environments.YH-acoustics™ classifies silencers into rectangular silencers, round silencers, and matrix silencers depending on the interface of the silencer being used.
The circular silencer is divided into typeA and tapyB, according to the interface flange.
Attenuators Specifications
Types：Rectangular / Circular Duct Silencer
Thickness: Varies
Material: Perforated Galvanised Steel, Steel Sheet and Rockwool
Accessories: Channels, flashings and furrings
Recommend Coating ：PE/PVDF/SMP/HDP
Wind load testing: Yes
Weatherproof: Yes
Fireproof Grade :A
Eco-Friendly:E0
Colour: Grey，white, other colours available on request
NOTE:Customizable according to drawing dimensions
Typical applications of attenuators
HAVC system
Industrial Plant Room Ventilation
Ventilation to Noise / Acoustic Enclosures
Cooling Towers Air Conditioning Installations
Exhaust Fans Silencers
Power Plants / Power Generation Equipment
Air Ventilation Systems Outdoor Unit
Refrigeration PlantsFan Inlet and Discharge
Radiators
Stacks, Blow-offs, Vents
Safety and Relief Valves
Equipment/Process Enclosure Ventilation
Turbine Enclosure Ventilation
