duct silencer

sound attenuator

In ductwork, a device (usually prefabricated) especially designed to provide much greater sound attenuation than would be provided by an equal length of ductwork; the pressure drop through the device is greater than for an equal length of ductwork.
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duct silencer edge length up to 1 000 mm, - approx.
100 m 3 / h 27 pieces fire dampers, Angular 12 pieces fire dampers, Round 45 pieces of variable volume flow controllers 14 pieces duct silencer 4 pieces weatherproof grille 3 pieces of deflector hoods 6 pieces channel cooler approximately 60 pieces poppet valves approximately 60 pieces ventilation grilles, Air outlets approximately 1 600 m 2 galvanized channel or molded parts approximately 1 550 m spiral folded pipe dn 100-355 approximately 400 pieces of pipe fittings dn 100-355 approximately 500 m 2 mineral wool insulation approximately 85 m 2 diff.
Duct silencer round or square, - 250 pieces of fire dampers, - 170 st.
duct silencer, volumetric flow controller, - 84 pieces of fire dampers / fire protection poppet valves, - 9 200 m 3 / h kitchen ventilation ceiling with lighting and extinguishing system, - 7 st.
1 480 m 3 / h, - 201 m 2 straight air ducts, - 220 m 2 air duct fittings, - 223 m spiral folded pipe 100 to 315 mm, - 11 m special round tube 500 mm, - 5 m round tube galvanized 350 mm, - 110 m flexible air ducts 100 to 224 mm with and without insulation, - 23 pieces flow rate controllers, - 8 pieces duct silencer, - 45 pieces of telephony silencers, - 6 pieces pipe silencers, - 16 pieces throttle valves, - 89 pieces ceiling air outlets, - 5 pieces lamella hoods, - 1 piece weather protection grille, - 22 pieces of fire dampers, - 857 m 2 thermal insulation, - 1 piece of circulating air cooling system.
Duct silencer, Approximately 300 m 2 sheet metal channel, Approximately 150 m 2 sheet metal channel - fittings, Approximately 20 m wfr, Galvanized, Up to dn 300, Approximately 300 m 2 closed cell thermal insulation.
Additionally, "fan noise from the air handling equipment can be reduced with fan selection and duct silencers, and structure-borne noise from equipment vibration can be reduced by mounting vibrating equipment on spring isolators made with coiled metal rods or elastomer isolators made of rubber or neoprene," he adds.
The cases showed that adding duct silencers or extending ductwork did not reduce the duct rumble.
approximately 27 st duct silencers made of galvanized steel.