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Sound Attenuator – Semi Flexible Ducting

Sound Attenuator/Ducting

Titon’s Semi Flexible Sound Attenuator/Silencers consists of a strong multiple layered corrugated perforated aluminium inner duct with an aluminium/polyester laminated outer jacket. The space between the inner and outer duct is filled with 25mm sound absorbing material which is protected by a vaper barrier.

The duct is fitted with galvanised metal sleeves at both ends to fit to duct work – Female spigots for direct connection to MVHR’s or duct connectors.

Our Semi Flexible Sound Attenuators fulfil all the requirements and are classified as specified within EN 13180: Ventilation for buildings – Duct work – Dimensions and mechanical requirements for flexible ducts.

89720,89721,89722,89723,89725,89728

Features & Benefits

Designed for Titon’s MVHR range
Easy to fit and install
Semi flexible self supporting ducting, minimises airflow resistance
Fulfils EN 13180: Ventilation for buildings – Duct work
Acoustically tested to BS EN ISO 7235
Available in 125mm, 150mm and 200mm diameter
Flexibility in shape and length, assists quick and tidy installations
Reduces both duct and breakout sound levels
Provides both acoustic and thermal insulation
Isolates unit to ducting to help prevent noise transmission through vibrations

Technical Information

Product Codes and Specific features

Product Codes and Specifications

Product Code	Product Type
89720	125mm ø Flexible Silencer 0.5m length F-F
89721	125mm ø Flexible Silencer 1m length F-F
89722	150mm ø Flexible Silencer 0.5m length F-F
89723	150mm ø Flexible Silencer 1m length F-F
89725	200mm ø Flexible Silencer 0.5m length F-F
89728	200mm ø Flexible Silencer 1m length F-F

Specifications

Temperature range; Inner duct: -30°C to 250°C, Outer jacket -30°C to 140°C
Operating pressure: up to +2000 Pa
Operating air velocity: max. 10 m/s
Min. bending radius: 1 x Ø + 25 mm
Standard length: 0.5 & 1.0 metres
Other diameters available to order.

Construction

Inner duct: Aluminium
Barrier: Nonwoven cloth
Glass wool blanket: 25mm, 16kg/m³
Outer jacket: Alu/poly laminate
R-value glass wool: 0.65 m² K/W
Thermal Conductivity 0.0385w/(m.k)
Appearance: Aluminium

Classification

EU (EN 13501-1):
Inner duct: A1
Outer Jacket: B-s1,d0 mode

Drawing and Dimensions

According to EN-1506
D_nom (mm)	D_female (mm)	Tol.
125	125.5	+0 ; -0.5
150	150.6	+0 ; -0.6
200	200.7	+0 ; -0.7

Sound Attenuation

Length - 500mm

Dn (mm)	H (mm)	L (mm)	L Compressed (mm)	Attenuation, dB - Mid-frequency, Hz
Dn (mm)	H (mm)	L (mm)	L Compressed (mm)	63	125	250	500	1000	2000	4000	8000
125	175	500	390	6.3	7.1	15.2	19.9	20.3	26.1	17.1	12.9
150	200	500	390	8.3	9.3	17.8	19.4	16.7	25	19.8	13.8
200	225	500	390	9.2	10	17.3	14.3	12.9	15.8	12	8.2

Length - 1000mm

Dn (mm)	H (mm)	L (mm)	L Compressed (mm)	Attenuation, dB - Mid-frequency, Hz
Dn (mm)	H (mm)	L (mm)	L Compressed (mm)	63	125	250	500	1000	2000	4000	8000
125	175	1000	580	12.4	20.1	33.6	29.8	29.5	33.6	32.1	23.6
150	200	1000	580	11.1	11.8	34.2	28.5	26.3	34.9	27.2	21.8
200	225	1000	580	11.1	14.6	29.5	20.7	21	30	17.7	13.2

Attenuation Through The Duct Wall (Breakout) - Length 500mm

Dn (mm)	H (mm)	L (mm)	L Compressed (mm)	Attenuation, dB - Mid-frequency, Hz
Dn (mm)	H (mm)	L (mm)	L Compressed (mm)	63	125	250	500	1000	2000	4000	8000
125	175	500	390	25.3	22.5	17.2	11.9	11.2	11.5	13	18
150	200	500	390	24.8	19.6	14.2	9.6	8.9	10.3	12.6	18.1
200	225	500	390	22.8	17.2	11.9	8	7.2	6.9	9.5	13.7

Attenuation Through The Duct Wall (Breakout) - Length 1000mm

Dn (mm)	H (mm)	L (mm)	L Compressed (mm)	Attenuation, dB - Mid-frequency, Hz
Dn (mm)	H (mm)	L (mm)	L Compressed (mm)	63	125	250	500	1000	2000	4000	8000
125	175	1000	580	25.2	21.6	18.7	13.2	12.2	12.5	14	17.5
150	200	1000	580	23.9	19.4	12.7	9	8	9.1	11.6	14.6
200	225	1000	580	21.8	17.8	12.9	9.3	8.4	8	10.5	13.9