SAR-GB • Circular sound attenuators with baffle

Circular
Galvanized steel
with baffle

Datasheet

Circular sound attenuator with baffle, duct in galvanized steel with insulation thickness of 100 mm sheathed in a dust cover for air speeds up to 20 m / s

Attenuation values according to DIN EN ISO 7235 (63, 125, 250, 500, 1k, 2k, 4k, 8k [Hz])

Application

For noise reduction in round air ducts
Reducing noise produced by fans
Reducing flow noises from flow regulators or other channel components
Can be used as a damper to prevent sound transfer trough the ducting between rooms

Advantage

The silencer with baffle type SAR-GB has a higher attenuation than the classic round silencer.

Composition

Circular silencers are designed with an external galvanised duct system
Insulation with thickness 100 mm (SAR-GB100)
Inner casing is made of perforated sheet steel
The void between the two is filled with sound-absorbing non-combustible mineral wool according to DIN4102 A2, specific mass> 20 kg / m³, building material class A2
Mineral wool certified according to RAL GZ 388
Connection to circular air ducts according to DIN EN 1506 or DIN EN 13180
Class D airtight connection with EPDM rubber according to DIN EN 12237
Airtight connection class D with EPDM rubber according to DIN EN 12237

Mounting

The attenuators should be mounted using duct suspension clamps, type OBMC, around the duct connection DN

Order example

SAR-GB100 315 L=600mm

Explanation:

SAR-GB = Type of sound attenuator with internal baffle

100 = Thickness of insulation in mm

315 = Connection diameter in mm

600 = Length in mm

Sound attenuation values

I = 100 mm
SAR-GB 100			[dB]
DN	D [mm]	L [mm]	63 Hz	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz	8000 Hz	[kg]
315	500	600	3	6	13	20	25	22	17	15	16
315	500	900	5	9	17	26	42	37	25	20	23
315	500	1200	5	10	22	34	52	51	32	24	30
355	560	600	3	5	10	16	27	24	16	12	17
355	560	900	5	8	16	25	41	36	24	19	26
355	560	1200	5	9	21	33	51	50	31	23	34
400	600	600	3	4	9	16	20	14	10	10	20
400	600	900	5	6	14	24	31	22	15	15	31
400	600	1200	5	8	16	30	42	32	21	18	42
450	630	900	4	5	13	23	30	21	14	14	35
450	630	1200	4	7	15	29	41	31	20	17	47
500	710	900	4	5	12	20	23	15	11	12	40
500	710	1200	4	6	14	27	34	21	14	15	53
560	800	1200	3	5	13	26	33	20	13	14	59
630	800	1200	3	4	11	23	24	14	11	12	63
710	900	1200	2	4	11	21	17	11	10	10	71
800	1000	1200	2	3	10	20	16	10	9	9	82

I = Insulation jacket thickness in mm
DN = Nominal connection diameter of silencer in mm
D = Outside diameter in mm
L = Length in mm

Pressure loss

ΔPt (Pa/m)
DN	Q (m³/h)
DN	1000	2000	3000	4000	5000	6000	7000	8000	9000	10000	11000	12000	13000	14000
315	13	50	100
355	8	23	48	70	101
400	3	9	22	48	58	80	100
450		6	12	20	30	43	58	72	87	101
500		3	7	11	18	25	33	43	52	65	78	95
560			4	7	11	15	21	26	33	40	49	60	66	77
630				6	8	11	14	18	22	27	32	37	41	50
710						4	6	8	10	12	14	17	20	24
800									5	6	7	8	9	12

ΔPt = Total pressure loss in Pa / m
DN = Nominal connection diameter of the silencer in mm
Q = Air flow in m³ / h

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