MS | TROX GmbH

Standard flange 30 mm

Angle section frame

Angle section frame 35 × 35 × 3 mm

Aerodynamically optimised splitter frame

Tested to VDI 6022

MS

Splitter sound attenuator with high insertion loss, even in the low-frequency range

Splitter sound attenuator, basically a duct section with integral splitters (type MK) with resonating panels, for ventilation and air conditioning systems

Attenuation effect due to absorption and resonance
Energy efficient due to aerodynamically formed frame (bullnose radius 20 mm)
Sound absorbing material is biosoluble and hence hygienically safe
Sound absorbing material faced with glass fibre fabric as a protection against erosion due to airflow velocities up to 20 m/s
The sound absorbing material is non-combustible, to EN 13501, fire rating class A1
Leakage class C and pressure class 2 according to EN 15727
For use in areas with potentially explosive atmospheres (according to EC Directive 2014/34/EU (ATEX)), zones 1, 2, and zones 21 and 22 (outside) according to EC Directive 1999/92/EC
Operating temperature up to 100 °C, with expanded metal (variant L) up to 300 °C for a limited period of time

Optional equipment and accessories

Expanded metal as an additional mechanical protection for the sound absorbing material
Stainless steel variant A2 (1.4301), with optional perforated metal facing as an additional protection for the sound absorbing material
Other stainless steel and aluminium variants as well as PUR coating are upon request

General information

Application

Splitter sound attenuators used for the reduction of fan noise and air-regenerated noise in ventilation and air conditioning systems
Attenuation effect due to absorption and resonance
Broadband attenuation even in the low frequency range of critical fan noise
For use in areas with potentially explosive atmospheres (EC Directive 2014/34/EU (ATEX)), zones 1, 2, 21 and 22 (outside) according to Directive 1999/92/EC

Special characteristics

Resonating panels ensure increased insertion loss in the frequency range of critical fan noise

Leakage class C and pressure class 2 according to EN 15727

Energy savings due to aerodynamically formed splitter frame
- Up to 30 % lower differential pressure
Hygiene tested and compliant with VDI 6022
Multi-section construction available for large dimensions

Nominal sizes

Width B: 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400 mm
- Intermediate sizes: in increments of 1 mm
  - Splitter thickness 100 mm: 150 – 2399 mm
  - Splitter thickness 200 mm: 250 – 2399 mm
  - Splitter thickness 230 mm: 288 – 2399 mm
- Sizes from 2401 – 4800 mm are available with the width subdivided in increments of 1 mm
  - Even no. of splitters: centre division
  - Odd no. of splitters: off-centre division

Height H: 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800 mm
- Intermediate sizes 150 – 1799 mm in increments of 1 mm
- Sizes from 1801 – 3600 mm are available with the height subdivided in increments of 1 mm
  - Centre division
Length L: 500, 750, 1000, 1250, 1500 mm
- Intermediate sizes 501 – 1499 mm in increments of 1 mm
Sizes from 1501 – 3000 mm are available with the length subdivided in increments of 1 mm
- Part L1: 1000, 1250, 1500 mm
- Part L2: at least 501 mm and ≤ L1, in increments of 1 mm
Width and/or height subdivided if B + H > 4200 mm
Airway width S
- Minimum: splitter thickness T × 0.25, but not < 40 mm
- Maximum: splitter thickness T × 2

Variants

MS with splitter type MK
- Splitter thickness 100 mm
- Splitter thickness 200 mm
- Splitter thickness 230 mm

Construction

Duct

No entry: with duct
OL: without duct (set of MK splitters only)

Splitter surface

F: Glass fibre fabric
L: Glass fibre fabric faced with expanded metal cover for additional mechanical protection of the sound absorbing material

Stainless steel construction with perforated metal facing

Materials and surfaces

No entry: galvanised steel 1.0917
A2: Stainless steel 1.4301
P1: splitters powder-coated RAL 7001, silver grey

Air duct connection

No entry: without air duct profile (set of splitters only)
P: air duct profile 30 mm, galvanised steel or stainless steel
W: angle section frame 35 × 35 × 3 mm, galvanised steel
T: air duct profile 20 mm, galvanised steel

Matching frame

No entry: none
G: matching frame (only for angle section frame, W)

Parts and characteristics

Duct
- Leakage class C and pressure class 2 according to EN 15727
- Various duct connections available

Matching frame

Angle section frame with the same pattern as the requested sound attenuator
For installation onto a duct (duct by others)

Aerodynamically formed frame
- Covers the edges of the sound absorbing material
- Reduces the pressure loss
- Helps to optimise the airflow, hence reducing the air-regenerated noise
- Increased rigidity due to special profile

Absorption material

Resonating panel

Construction features

Bent duct with grooves for increased rigidity
Sound attenuators with angle section frame, width or height subdivided
- Galvanised construction only

Aerodynamically formed splitter frame (bullnose radius 20 mm) that helps to reduce turbulence on both the upstream and downstream sides; frame with grooves for increased rigidity
- Frame edges with bullnose for increased rigidity
Operating temperature up to 100 °C; variant L up to 300 °C for 8h max.

Material and surfaces

Duct, flange in galvanised sheet steel 1.0917 or stainless steel 1.4301
Angle section frame in galvanised L steel S235JRC2

Splitter frame, centre mullion and resonating panels made of galvanised sheet steel 1.0917 or stainless steel 1.4301
- Expanded metal cover made of galvanised steel 1.0917
- Perforated metal facing made of stainless steel 1.4301
- Sound absorbing material mineral wool
  - According to EN 13501, fire rating class A1, non-combustible
  - RAL quality mark RAL-GZ 388
  - Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008
  - Faced with glass fibre fabric, as a protection against erosion from airflow velocities of up to 20 m/s
  - Inert to fungal and bacterial growth according to EN 846

Standards and guidelines

Insertion loss and sound power of air-regenerated noise tested according to ISO 7235
Meets the hygiene requirements of VDI 6022, VDI 3803 Part 1 and DIN 1946 Part 4
EC Directive 2014/34/EC (ATEX): Equipment and protective systems intended for use in areas with potentially explosive atmospheres
EC Directive 1999/92/EC (ATEX): Improvement of the safety and health protection of workers potentially at risk from explosive atmospheres

Leakage class and pressure class according to EN 15727

Maintenance

Low-maintenance as construction and materials are not subject to wear

Regular cleaning intervals according to VDI6022

Technical information

Function, Technical Data, Quick Sizing, Specification Text, Order Code

Schematic illustration of MS/XS

1 Duct
2 Duct connection
3 Splitter

Splitter sound attenuators type MS contain splitters type MK.
The attenuation effect of the MK splitters is due to absorption and resonance. The splitters have a mineral wool infill as sound absorbing material. Part of the splitter surface that runs parallel to the airflow is covered with resonating panels. These panels start oscillating due to the sound (resonance) and hence absorb sound energy. Resonance works best in the frequency range of critical fan noise. There is a higher attenuation across a wider frequency range when compared to mere absorption splitters.

Splitter thickness	100, 200, 230 mm
Nominal sizes (B × H × L)	Type MS 100: 150 × 150 × 500 mm – 2400 × 1800 × 1500 mm Type MS 200: 250 × 150 × 500 mm – 2400 × 1800 × 1500 mm Type MS 230: 288 × 150 × 500 mm – 2400 × 1800 × 1500 mm
Width subdivided	2401 – 4800 mm
Height subdivide	1801 – 3600 mm
Length subdivided	1501 – 3000 mm
Intermediate sizes	In increments of 1 mm
Operating temperature	Up to 100 °C, variant L up to 300 °C for 8 h max.

The length (L) of splitter sound attenuators refers to the airflow direction.

Quick sizing tables provide a good overview of the insertion loss and of differential pressures for different airway widths and airflow velocities. Intermediate values can be calculated with our Easy Product Finder design program. The differential pressures apply to sound attenuators with a height of 1 m.

MK100, MS100, insertion loss De [dB] and differential pressure Δpt [Pa]

L	Airway width	Centre frequency f_m [Hz]								v_s [m/s]
L	Airway width	63	125	250	500	1000	2000	4000	8000	6	10	14
500	50	4	9	10	11	19	25	21	16	10	29	56
500	100	3	4	5	8	13	15	11	8	8	23	45
1000	50	5	11	18	20	28	34	28	23	13	37	72
1000	80	4	8	12	16	23	25	19	15	10	28	55
1000	100	4	7	9	13	21	21	15	11	9	26	51
1500	50	6	14	26	29	37	42	36	29	16	44	87
1500	80	5	11	18	22	32	32	24	19	12	32	63
1500	100	4	9	14	19	29	28	19	13	10	29	56
2000	50	7	17	34	38	46	> 50	44	36	19	52	102
2000	80	6	14	24	29	40	40	29	23	13	36	70
2000	100	5	12	19	24	37	34	22	16	11	32	62
2500	50	8	20	42	47	> 50	> 50	> 50	43	22	60	118
2500	80	7	16	30	35	48	47	34	27	14	40	78
2500	100	6	15	24	30	44	41	26	19	12	34	67
3000	50	9	22	50	> 50	> 50	> 50	> 50	50	24	68	133
3000	80	8	19	35	42	> 50	> 50	39	31	16	44	85
3000	100	7	17	28	35	> 50	47	30	22	13	37	73

MK200, MS200, insertion loss De [dB] and differential pressure Δpt [Pa]

L	Airway width	Centre frequency f_m [Hz]								v_s [m/s]
L	Airway width	63	125	250	500	1000	2000	4000	8000	6	10	14
500	50	4	6	18	21	24	18	15	13	21	58	114
500	100	2	4	12	13	15	12	10	8	11	31	61
1000	50	6	13	29	34	39	29	20	17	24	67	131
1000	80	5	11	24	26	29	22	16	13	15	43	84
1000	100	4	9	21	22	24	19	13	11	13	35	69
1500	50	8	20	41	46	> 50	41	26	21	27	75	147
1500	80	6	16	33	36	40	30	20	16	17	48	94
1500	100	5	14	30	32	34	25	17	14	14	40	78
2000	50	10	28	> 50	> 50	> 50	> 50	31	26	30	83	164
2000	80	8	22	43	47	> 50	39	24	19	19	53	105
2000	100	7	20	38	41	43	32	21	17	16	44	86
2000	200	3	12	23	22	18	12	10	7	9	25	50
2500	50	13	35	> 50	> 50	> 50	> 50	37	30	33	92	180
2500	80	10	28	> 50	> 50	> 50	47	28	23	21	59	115
2500	100	8	25	47	50	> 50	39	24	19	17	48	94
2500	200	4	14	29	28	22	14	11	8	10	28	54
3000	50	15	42	> 50	> 50	> 50	> 50	42	34	36	100	197
3000	80	11	34	> 50	> 50	> 50	> 50	33	26	23	64	126
3000	100	10	30	> 50	> 50	> 50	46	28	22	19	53	103
3000	200	5	17	35	34	26	16	13	10	11	30	59

MK230, MS230, insertion loss De [dB] and differential pressure Δpt [Pa]

L	Airway width	Centre frequency f_m [Hz]								v_s [m/s]
L	Airway width	63	125	250	500	1000	2000	4000	8000	6	10	14
500	80	2	6	14	16	18	14	12	12	15	43	84
500	100	2	5	12	13	15	11	10	11	13	35	69
1000	80	6	11	24	25	29	21	15	15	18	49	97
1000	100	5	10	21	22	25	17	13	14	14	40	78
1000	200	2	7	14	12	10	6	7	9	8	23	44
1500	80	9	17	34	35	41	28	19	18	20	56	109
1500	100	8	15	31	31	34	23	16	16	16	45	88
1500	200	3	11	20	17	14	9	10	10	9	25	49
2000	80	13	22	44	45	> 50	34	22	22	22	62	121
2000	100	11	20	40	39	44	29	20	19	18	50	98
2000	200	4	14	26	23	18	12	12	12	10	28	54
2500	80	16	27	> 50	> 50	> 50	41	25	25	25	68	134
2500	100	13	25	49	48	> 50	35	23	22	20	55	108
2500	200	5	18	33	28	22	15	15	13	11	30	59
3000	80	19	33	> 50	> 50	> 50	48	29	28	27	74	146
3000	100	16	30	> 50	> 50	> 50	41	26	25	22	60	117
3000	200	6	21	39	34	26	17	17	15	12	33	64

Specification text

Splitter sound attenuators used for the reduction of fan noise and air-regenerated noise in ventilation and air conditioning systems. Attenuation effect due to absorption and resonance. Energy-saving as well as hygiene tested and certified. Splitter sound attenuator that consist of a duct with connections and integral type MK splitters or a splitter set. Splitters consist of an aerodynamically formed frame (bullnose radius 20 mm), sound absorbing material, and resonating panels. The splitter frame reduces pressure losses and air-regenerated noise. The profiled frame with bullnose edges increase the stiffness of the splitter. Insertion loss and sound power level of air-regenerated noise measured according to EN ISO 7235. For requirements in areas with potentially explosive atmospheres (ATEX), zones 1, 2, 21 and 22 (outside) according to Directive 1999/92/EC. The duct meets leakage class C and pressure class 2 according to EN 15727.

Special characteristics

Resonating panels ensure increased insertion loss in the frequency range of critical fan noise

Leakage class C and pressure class 2 according to EN 15727

Energy savings due to aerodynamically formed splitter frame
- Up to 30 % lower differential pressure
Hygiene tested and compliant with VDI 6022
Multi-section construction available for large dimensions

Material and surfaces

Duct, flange in galvanised sheet steel 1.0917 or stainless steel 1.4301
Angle section frame in galvanised L steel S235JRC2

Splitter frame, centre mullion and resonating panels made of galvanised sheet steel 1.0917 or stainless steel 1.4301
- Expanded metal cover made of galvanised steel 1.0917
- Perforated metal facing made of stainless steel 1.4301
- Sound absorbing material mineral wool
  - According to EN 13501, fire rating class A1, non-combustible
  - RAL quality mark RAL-GZ 388
  - Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008
  - Faced with glass fibre fabric, as a protection against erosion from airflow velocities of up to 20 m/s
  - Inert to fungal and bacterial growth according to EN 846

Construction

Duct

No entry: with duct
OL: without duct (set of MK splitters only)

Splitter surface

F: Glass fibre fabric
L: Glass fibre fabric faced with expanded metal cover for additional mechanical protection of the sound absorbing material

Stainless steel construction with perforated metal facing

Materials and surfaces

No entry: galvanised steel 1.0917
A2: Stainless steel 1.4301
P1: splitters powder-coated RAL 7001, silver grey

Air duct connection

No entry: without air duct profile (set of splitters only)
P: air duct profile 30 mm, galvanised steel or stainless steel
W: angle section frame 35 × 35 × 3 mm, galvanised steel
T: air duct profile 20 mm, galvanised steel

Matching frame

No entry: none
G: matching frame (only for angle section frame, W)

Technical data

Splitter thickness: 100, 200, 230 mm
Dimensions B × H × L: MS 100: 150 × 150 × 500 mm, MS 200: 250 × 150 × 500 mm, MS 230: 288 × 150 × 500 mm
Undivided construction up to 2400 × 1800 × 1500 mm
Width subdivided: 2401 – 4800 mm
Height subdivided: 1801 – 3600 mm
Length subdivided: 1501 – 3000 mm
Intermediate sizes: in increments of 1 mm
Operating temperature: up to 100 °C, variant L up to 300 °C for 8 h max.

The length (L) of splitter sound attenuators refers to the airflow direction

Sizing data

B [mm]
H [mm]
L (in airflow direction) [mm]
q_v (m³/h)
D_e at 250 Hz [dB]
Δp_t [Pa]

–

900

600

1500

200

1 Type

MS Splitter sound attenuator

2 Duct
No entry: with duct
OL Without duct (set of MK splitters only)

3 Splitter surface
F Glass fibre fabric
L Glass fibre fabric and expanded metal

4 Material of duct and splitters
No entry: galvanised steel (1.0917)
A2 Stainless steel (1.4301)
P1 powder-coated, RAL 7001 (silver grey) (with duct OL)

5 Width [mm]
150 – 4800 (with duct casing)
150 – 100000 (without duct casing)

6 Height [mm]
150 – 3600 (with duct casing)
150 – 5000 (without duct casing)

7 Length in airflow direction [mm]
500 – 3000 (with duct casing)
150 – 5000 (without duct casing)

8 No. of splitters Specify

9 Splitter thickness [mm]

100, 200, 230

10 Duct connection
No entry: none (set of MK splitters only)
P Flange, 30 mm, galvanised steel or stainless steel
W Angle section frame, 35 × 35 × 3 mm, galvanised steel S235JRC2 only (sound attenuators with the width or height subdivided have to have an angle section frame)
T Flange, 20 mm, galvanised steel only

11 Matching frame
No entry: none
G Matching frame (only for angle section frame)

Order example: MS-L/900×1500×1000/3×230/P

Duct	With duct
Splitter surface	Glass fibre fabric and expanded metal
Material	Galvanised steel (1.0917)
Width	900 mm
Height	1500 mm
Length	1000 mm
No. of splitters	3
Splitter thickness	230 mm
Duct connection	Standard flange 30 mm

Order example: MS-OL-L-A2/800×1500×1500/3×200

Duct	Without duct (set of MK splitters only)
Splitter surface	Glass fibre fabric and perforated sheet metal
Material	Stainless steel (1.4301)
Width	800 mm
Height	1500 mm
Length	1500 mm
No. of splitters	3
Splitter thickness	200 mm

Dimensions

Flange 30 mm (P), undivided construction

Angle section frame 35 × 35 × 3 mm (W), undivided construction

Flange 20 mm (T), undivided construction

Angle section frame 35 × 35 × 3 mm (W), for constructions with the width or height subdivided

INominal sizes

Width B: 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400 mm
Intermediate sizes: in increments of 1 mm
Splitter thickness 100 mm: 150 – 2399 mm
Splitter thickness 200 mm: 250 – 2399 mm
Splitter thickness 230 mm: 288 – 2399 mm
Splitter thickness 300 mm: 375 – 2399 mm
Sizes from 2401 – 4800 mm are available with the width subdivided in increments of 1 mm
Even no. of splitters: centre division
Odd no. of splitters: off-centre division

Height H: 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800 mm
Intermediate sizes 150 – 1799 mm in increments of 1 mm
Sizes from 1801 – 3600 mm are available with the height subdivided in increments of 1 mm
Centre division
Length L: 500, 750, 1000, 1250, 1500 mm
Intermediate sizes 501 – 1499 mm in increments of 1 mm
Sizes from 1501 – 3000 mm are available with the length subdivided in increments of 1 mm
Part L1: 1000, 1250, 1500 mm
Part L2: at least 501 mm and ≤ L1, in increments of 1 mm
Width and/or height subdivided if B + H > 4200 mm
Airway width S
Minimum: splitter thickness T × 0.25, but not < 40 mm
Maximum: splitter thickness T × 2

Installation details

Schematic illustration of subdivided sound attenuators

1 Sound attenuator, with width and height subdivided
2 Seal
3 Screw fix connection

Installation and commissioning

Follow the installation manual and comply with the general codes of good practice in order to achieve the given performance data
Up to height H = 1200 mm, length L = 1500 mm and 40 kg: any installation orientation, but we recommend upright installation of splitters
From height H = 1201 mm: upright installation only
The length (L) of sound attenuator splitters and splitter sound attenuators refers to the airflow direction; be sure to note how width, height and length are defined, particularly in case of a vertical airflow
A turbulent airflow may cause damage to the splitters
- A straight upstream section is required upstream of the sound attenuator
- The recommended minimum upstream section depends on the change of direction, change of cross-section and splitter arrangement
Installation in ducts outside closed rooms requires sufficient protection against the effects of weather

DOWNLOADS

product information

Product data sheet MS

MS_PD_2022_10_06_DE_en Product data sheet 1,3 MB pdf

certificates

ATEX manufacturer's statement MS

MS-Atex_CE_ATEX_2022_02_23_DE_en Manufacturer's statement 1,6 MB pdf
Certificate concerning statistical leakage tests

LC_v1_2024_10_DE_en Certificate 660 KB pdf
Declaration of hygiene conformity MS

MS_HC_2024_05_DE_en Certificate 1,4 MB pdf
Non-CE Manufacturer's statement MS

MS_NotCE_2022_02_08_14_47_11_DE_en Certificate 1,4 MB pdf

operation manuals

Installation manual XS, MS, XK, MK, RK

XS_MS_XK_MK_RK_IM_A00000090240_V2_2023_03_GB_en Installation manual 2,4 MB pdf

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MS

Splitter sound attenuator with high insertion loss, even in the low-frequency range

General information

Technical information

Function, Technical Data, Quick Sizing, Specification Text, Order Code

Dimensions

Installation details

DOWNLOADS

product information

Product data sheet MS

certificates

ATEX manufacturer's statement MS

Certificate concerning statistical leakage tests

Declaration of hygiene conformity MS

Non-CE Manufacturer's statement MS

operation manuals

Installation manual XS, MS, XK, MK, RK

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

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