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Standard flange 30 mm

Standard flange 30 mm

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Angle section frame 

Angle section frame 35 × 35 × 3 mm

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Aerodynamically optimised splitter frame

Aerodynamically optimised splitter frame

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Tested to VDI 6022

Tested to VDI 6022

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MS-XS_gc_09png.png.link
MS-XS_gc_01png.png.link
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VDI6022_gs_01ai.ai.link

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
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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

  • FUNCTION
  • TECHNICAL DATA
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE

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 thickness100, 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 subdivided2401 – 4800 mm
Height subdivide1801 – 3600 mm
Length subdivided1501 – 3000 mm
Intermediate sizesIn 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 fm [Hz]

vs [m/s]
63125250500100020004000800061014
5005049101119252116102956

500

1003458131511882345
100050511182028342823133772

1000

8048121623251915102855

1000

100479132121151192651
150050614262937423629164487

1500

80511182232322419123263

1500

10049141929281913102956
200050717343846

> 50

44361952102

2000

80614242940402923133670

2000

100512192437342216113262
2500508204247

> 50

> 50

> 50

432260118

2500

80716303548473427144078

2500

100615243044412619123467
30005092250

> 50

> 50

> 50

> 50

502468133

3000

808193542

> 50

> 50

3931164485

3000

1007172835

> 50

473022133773

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

L

Airway width

Centre frequency fm [Hz]

vs [m/s]

63125250500100020004000800061014
50050461821241815132158114

500

1002412131512108113161
1000506132934392920172467131

1000

80511242629221613154384

1000

10049212224191311133569
1500508204146

> 50

4126212775147

1500

80616333640302016174894

1500

100514303234251714144078
2000501028

> 50

> 50

> 50

> 50

31263083164

2000

808224347

> 50

3924191953105

2000

100720384143322117164486

2000

2003122322181210792550
2500501335

> 50

> 50

> 50

> 50

37303392180

2500

801028

> 50

> 50

> 50

4728232159115

2500

1008254750

> 50

392419174894

2500

20041429282214118102854
3000501542

> 50

> 50

> 50

> 50

423436100197

3000

801134

> 50

> 50

> 50

> 50

33262364126

3000

1001030

> 50

> 50

> 50

4628221953103

3000

200517353426161310113059

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

L

Airway width

Centre frequency fm [Hz]

vs [m/s]

63125250500100020004000800061014
5008026141618141212154384

500

10025121315111011133569
100080611242529211515184997

1000

100510212225171314144078

1000

2002714121067982344
1500809173435412819182056109

1500

100815313134231616164588

1500

2003112017149101092549
20008013224445

> 50

3422222262121

2000

1001120403944292019185098

2000

200414262318121212102854
2500801627

> 50

> 50

> 50

4125252568134

2500

10013254948

> 50

3523222055108

2500

200518332822151513113059
3000801933

> 50

> 50

> 50

4829282774146

3000

1001630

> 50

> 50

> 50

4126252260117

3000

200621393426171715123364

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]
  • qv  (m³/h)
  • De at 250 Hz [dB]
  • Δpt [Pa]

MSFA2/900×600×1500/3×200/P/G
||| | | | | | | | |
123 4 5 6 7 8 9 10 11
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
DuctWith duct
Splitter surfaceGlass fibre fabric and expanded metal
MaterialGalvanised steel (1.0917)
Width900 mm
Height1500 mm
Length 1000 mm
No. of splitters3
Splitter thickness230 mm
Duct connectionStandard flange 30 mm


 Order example: MS-OL-L-A2/800×1500×1500/3×200
DuctWithout duct (set of MK splitters only)
Splitter surfaceGlass fibre fabric and perforated sheet metal
MaterialStainless steel (1.4301)
Width800 mm
Height1500 mm
Length 1500 mm
No. of splitters3
Splitter thickness200 mm

Dimensions

  • DIMENSIONS

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

  • INSTALLATION DETAILS

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

certificates

operation manuals

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