Type MSA

For increased insertion loss and broadband attenuation even in the low frequency range

Splitter sound attenuators with integral splitters with resonating panels, suitable for air conditioning systems

  • Attenuation effect due to resonance and absorption
  • Energy efficient due to aerodynamically profiled frame (radius > 15 mm)
  • Acoustic data measured to ISO 7235
  • Absorption material is biosoluble and hence hygienically safe
  • Absorption material faced with glass fibre fabric as a protection against erosion due to airflow velocities up to 20 m/s
  • Absorption material non-combustible, to EN 13501, fire rating class A1
  • Intermediate sizes in increments of 1 mm
  • For use in zones 1 and 2 as well as in zones 21 and 22 according to EU Directive 94/9/EC (ATEX)
  • Operating temperature up to 100 °C


Optional equipment and accessories

  • Additional perforated sheet metal to protect the absorption material
  • Stainless steel, aluminium and PUR-coated constructions upon request

Splitter sound attenuator, variant MSA200 00136746_0

Splitter thickness 200 mm

  • Application
  • Description

Application

  • Splitter sound attenuators of Type MSA used for the reduction of fan noise and air-regenerated noise in air conditioning systems
  • Attenuation effect due to absorption and resonance
  • Broadband attenuation even in the low frequency range of critical fan noise
  • Hygiene tested and certified to VDI 6022
  • For use in potentially explosive atmospheres (ATEX), zones 1, 2, 21 and 22 (outside)

Special characteristics

  • Resonating panels ensure increased insertion loss in the frequency range of critical fan noise
  • Up to 30 % lower differential pressure
  • Energy efficient and/or space saving due to aerodynamically profiled frame
  • Hygiene tested and certified
  • Multi-section construction available for large dimensions

Nominal sizes

  • B: 200 (only MSA100), 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400
  • MSA100: intermediate sizes (width) 140 – 2399 mm in increments of 1 mm
  • MSA200: intermediate sizes (width) 250 – 2399 mm in increments of 1 mm
  • MSA230: intermediate sizes (width) 288 – 2399 mm in increments of 1 mm
  • Width subdivided: 2401 – 4800 mm, in increments of 1 mm
  • 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)
  • Height subdivided: 1801 – 4800 mm, in increments of 1 mm
  • L: 500, 750, 1000, 1250, 1500 mm (intermediate sizes 501 – 1499 mm in increments of 1 mm)
  • Length subdivided: 1501 – 2999 mm in increments of 1 mm

Variants

  • MSA100: splitter thickness of 100 mm
  • MSA200: splitter thickness of 200 mm
  • MSA230: splitter thickness of 230 mm

Construction

Surface of splitter area not covered by a resonating panel

  • F: Glass fibre fabric
  • L: Glass fibre fabric and additional perforated sheet metal to protect the absorption material


Duct connection

  • P: Standard flange 30 mm
  • W: Angle section frame 35 × 35 × 3 mm

Parts and characteristics

  • Casing
  • Aerodynamically profiled frame
  • Absorption material and resonating panels fitted to reduce air-regenerated noise by absorption and resonance

Construction features

  • Casing with grooves for increased rigidity; larger sizes are extra reinforced
  • Aerodynamically profiled splitter frame (radius > 15 mm) that enables a reduction of turbulence both upstream and downstream; frame with grooves for increased rigidity
  • Frame edges are folded to protect the infill
  • Attenuators with width or height subdivided have an angle section frame
  • Operating temperature up to 100 °C

Materials and surfaces

  • Casing, splitter frames, centre mullion and resonating panels made of galvanised sheet steel
  • Flange and angle section frame made of galvanised steel
  • Absorption material is mineral wool


Mineral wool

  • To EN 13501, fire rating class A1, non-combustible
  • RAL quality mark RAL-GZ 388
  • Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
  • Faced with glass fibre fabric as a protection against erosion through airflow velocities of up to 20 m/s
  • Inert to fungal and bacterial growth

Standards and guidelines

  • Insertion loss and sound power level of air-regenerated noise tested to ISO 7235
  • Meets the hygiene requirements of VDI 6022, DIN 1946, parts 1 and 2 as well as of VDI 3803
  • Directive 94/9/EC: Equipment and protective systems intended for use in potentially explosive atmospheres

Maintenance

  • Maintenance-free as construction and materials are not subject to wear

Technische Information

Function, Technical data, Quick sizing, Specification text, Order code, Related products

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code

Functional description

Splitter sound attenuators of Type MSA contain splitters of Type MKA.

The attenuation effect of the MKA splitters is due to absorption and resonance.

The splitters have a mineral wool infill as absorption 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

MSA100: 140 × 150 × 500 mm – 2400 × 1800 × 1500 mm, MSA200: 250 × 150 × 500 mm – 2400 × 1800 × 1500 mm, MSA230: 288 × 150 × 500 mm – 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

– 100 °C

The length (L) of splitter 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 programme.

The sound power levels LWA apply to sound attenuators with a cross-sectional area (B × H) of 1 m².

The differential pressures apply to sound attenuators with a height of 1 m.

Sizing example

Given data

Duct B = 800 mm, H = 900 mm

V = 2900 l/s (10440 m³/h)

De = 30 dB at 250 Hz

Quick sizing

MSA200 L = 1000 mm, S = 50 mm

Calculation procedure

A = 0.800 × 0.9 = 0.72 m²

v = V ∕ A = 2900 ∕ 0.72 ( ∕ 1000) = 4.0 m/s

Δpst = 12 Pa

LWA = 21 dB(A)

MSA, MKA, XSA, XKA, RKA, air-regenerated noise

vs

m/s

4

6

8

10

12

14

16

18

20

LWA

dB(A)

21

31

38

43

48

51

55

58

60


MKA100, MSA100, insertion loss and differential pressure

L S Centre frequency fm [Hz] vs [m/s]
L S 63 125 250 500 1000 2000 4000 8000 4 10 20
L S De Δpst
mm mm Hz Pa

500

40

4

10

11

13

21

27

24

18

5

32

>80

1000

40

5

13

20

23

31

38

32

26

7

44

>80

1000

60

5

11

17

19

28

32

27

21

5

33

>80

1500

40

6

16

30

32

42

48

40

34

9

55

>80

1500

60

6

14

25

28

38

41

33

27

6

38

>80

1500

100

4

10

14

19

29

28

19

14

5

29

>80

2000

40

8

19

39

42

53

58

49

42

11

66

>80

2000

60

7

16

32

36

47

50

40

34

7

44

>80

2000

100

5

12

19

25

37

35

23

16

5

32

>80

2000

200

3

9

10

17

25

15

9

8

4

25

>80

2500

40

9

22

48

52

63

68

57

51

12

77

>80

2500

60

8

19

40

45

57

59

47

40

8

50

>80

2500

100

6

14

24

30

45

41

27

19

6

34

>80

2500

200

3

12

12

21

33

19

12

11

4

26

>80

3000

40

10

25

58

62

74

78

65

59

14

>80

>80

3000

60

9

22

48

53

67

68

54

46

9

56

>80

3000

100

7

16

28

36

53

47

31

22

6

37

>80

3000

200

2

14

15

26

41

24

16

14

4

27

>80


MKA200, MSA200, insertion loss and differential pressure

L S Centre frequency fm [Hz] vs [m/s]
L S 63 125 250 500 1000 2000 4000 8000 4 10 20
L S De Δpst
mm mm Hz Pa

500

50

5

7

19

21

26

22

17

14

9

58

>80

500

100

2

4

12

12

15

11

9

8

5

31

>80

1000

50

6

16

33

39

41

39

26

20

11

67

>80

1000

100

4

10

22

23

26

19

13

11

6

35

>80

1000

200

2

7

13

12

12

10

8

6

3

21

>80

1500

50

9

22

44

53

56

54

34

25

12

75

>80

1500

100

5

15

32

33

37

25

16

14

6

40

>80

1500

200

3

9

19

18

15

12

10

7

4

23

>80

1500

400

1

6

10

8

8

6

4

4

2

15

61

2000

50

12

29

55

67

72

70

43

29

13

>80

>80

2000

100

6

19

42

44

47

31

19

17

7

44

>80

2000

200

4

12

25

23

18

15

12

9

4

25

>80

2000

400

1

8

13

10

10

8

5

5

3

17

67

2500

50

14

38

61

72

78

79

49

35

15

>80

>80

2500

100

8

25

50

54

58

38

23

18

8

48

>80

2500

200

5

16

30

29

23

16

13

10

4

28

>80

2500

400

2

10

16

13

12

9

6

5

3

18

72

3000

50

17

48

67

77

84

88

56

40

16

>80

>80

3000

100

10

30

58

64

69

44

26

19

8

53

>80

3000

200

6

19

35

35

27

17

15

11

5

30

>80

3000

400

3

13

19

15

14

10

7

6

3

19

77


MKA230, MSA230, insertion loss and differential pressure

L S Centre frequency fm [Hz] vs [m/s]
L S 63 125 250 500 1000 2000 4000 8000 4 10 20
L S De Δpst
mm mm Hz Pa

500

60

3

7

16

19

21

17

14

14

9

57

>80

500

115

2

5

11

12

13

10

9

10

5

31

>80

1000

60

7

13

27

30

35

25

18

18

10

66

>80

1000

115

4

10

20

20

22

15

12

13

6

35

>80

1000

230

1

7

12

10

8

4

6

8

3

20

>80

1500

60

11

19

38

41

49

33

21

21

12

74

>80

1500

115

7

14

28

28

30

20

15

15

6

40

>80

1500

230

2

10

18

15

10

6

9

9

4

23

>80

2000

60

15

24

50

50

50

42

25

25

13

>80

>80

2000

115

9

19

37

36

39

26

18

18

7

44

>80

2000

230

3

13

24

19

13

8

11

10

4

25

>80

2000

460

0

7

10

3

0

0

3

3

3

16

64

2500

60

19

30

50

50

50

50

29

28

15

>80

>80

2500

115

12

24

46

44

47

31

21

20

8

48

>80

2500

230

4

16

29

24

16

11

13

12

4

27

>80

2500

460

0

9

13

4

0

0

5

3

3

17

69

3000

60

24

36

50

50

50

50

32

32

16

>80

>80

3000

115

14

28

50

50

50

36

24

23

8

52

>80

3000

230

4

19

35

29

18

13

15

13

5

29

>80

3000

460

0

11

16

6

0

0

7

3

3

19

74


Splitter sound attenuators used for the reduction of fan noise and air-regenerated noise in air conditioning systems. Attenuation effect due to absorption and resonance. Energy-saving as well as hygiene tested and certified.

Sound attenuators which consist of a casing with duct connections and splitters. Splitters consists of an aerodynamically profiled frame (radius > 15 mm), absorption material, and resonating panels.

Frame edges are folded to protect the sound absorbing infill.

Insertion loss and sound power level of the air-regenerated noise tested to ISO 7235.

Meets the hygiene requirements of VDI 6022, DIN 1946, parts 2 and 4, as well as of VDI 3803.

Special characteristics

  • Resonating panels ensure increased insertion loss in the frequency range of critical fan noise
  • Up to 30 % lower differential pressure
  • Energy efficient and/or space saving due to aerodynamically profiled frame
  • Hygiene tested and certified
  • Multi-section construction available for large dimensions

Materials and surfaces

  • Casing, splitter frames, centre mullion and resonating panels made of galvanised sheet steel
  • Flange and angle section frame made of galvanised steel
  • Absorption material is mineral wool


Mineral wool

  • To EN 13501, fire rating class A1, non-combustible
  • RAL quality mark RAL-GZ 388
  • Biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
  • Faced with glass fibre fabric as a protection against erosion through airflow velocities of up to 20 m/s
  • Inert to fungal and bacterial growth

Construction

Surface of splitter area not covered by a resonating panel

  • F: Glass fibre fabric
  • L: Glass fibre fabric and additional perforated sheet metal to protect the absorption material


Duct connection

  • P: Standard flange 30 mm
  • W: Angle section frame 35 × 35 × 3 mm

Technical data

  • Splitter thickness: 100, 200, 230 mm
  • Nominal sizes: MSA100: 140 × 150 × 500 mm – 2400 × 1800 × 1500 mm, MSA200: 250 × 150 × 500 mm – 2400 × 1800 × 1500 mm, MSA230: 288 × 150 × 500 mm – 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: – 100 °C


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

Sizing data

  • B _______________________ [mm]
  • H _______________________ [mm]
  • L (in airflow direction) __________ [mm]
  • V _______________________ [m³/h]
  • De at 250 Hz ________________ [dB]
  • Δpst _______________________ [Pa]

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design programme.

00106841_0.

 Type
MSA       Splitter sound attenuator with casing

 Splitter thickness [mm]
100
200
230

 Airway width (distance between splitters) [mm]

 No. of splitters

 

 Duct connection
P       Standard flange 30 mm
W       Angle section frame 35 × 35 × 3 mm (required for sound attenuators with width and/or height subdivided)

 Splitter surface
F       Glass fibre fabric
L       Glass fibre fabric and perforated sheet metal

 Nominal width B [mm]

 Nominal height H [mm]

 Nominal length L in airflow direction [mm]

The length (L) of sound attenuator splitters and splitter attenuators refers to the airflow direction. Remember this with regard to vertical ducting.

Order example: MSA100–100–2–WL/400×1500×1500

Splitter thickness

100 mm

Airway width

100 mm

No. of splitters

2

Connecting subframe

Angle section frame

Splitter surface

Glass fibre fabric and perforated sheet metal

Width

400 mm

Height

1500 mm

Length (in airflow direction)

1500 mm


 

Variants, Dimensions and weight, Product details

  • Variants
  • Dimensions and weight
  • Product details
MSA 00102543_0..
① Construction with flange
② Construction with angle section frame


  • B: 200 (only MSA100), 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400
  • MSA100: intermediate sizes 140 – 2399 mm in increments of 1 mm
  • MSA200: intermediate sizes 250 – 2399 mm in increments of 1 mm
  • MSA230: intermediate sizes 288 – 2399 mm in increments of 1 mm
  • Width subdivided: 2401 – 4800 mm, in increments of 1 mm
  • 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)
  • Height subdivided: 1801 – 4800 mm, in increments of 1 mm
  • L: 500, 750, 1000, 1250, 1500 mm (intermediate sizes 501 – 1499 mm in increments of 1 mm)
  • Length subdivided: 1501 – 2999 mm in increments of 1 mm

The total weight of a splitter sound attenuator is the combined weight of the casing (with standard flange or angle section frame) and all splitters.

The total weight for intermediate sizes can be generated with our Easy Product Finder design programme.

For details on corner holes and flange holes see Product Details

Sound attenuator casing, nominal length

L

mm

500

750

1000

1250

1500


Sound attenuator casing, nominal height

H

mm

300

600

900

1200

1500

1800


Sound attenuator casing, nominal width

B MSA100 MSA200 MSA230
B T n S T n S T n S
B mm mm mm mm mm mm

200

100

1

100

400

100

2

100

200

1

200

230

1

85

600

100

2 – 4

50 – 200

200

2

100

230

2

70

800

100

3 – 5

60 – 167

200

2 – 3

67 – 200

230

2

170

1000

100

4 – 7

43 – 150

200

3 – 4

50 – 133

230

3

103

1200

100

4 – 8

50 – 200

200

3 – 5

40 – 200

230

3 – 4

70 – 170

1400

100

5 – 10

40 – 180

200

4 – 5

80 – 150

230

3 – 5

50 – 237

1600

100

6 – 11

46 – 200

200

4 – 7

57 – 200

230

4 – 5

90 – 170

1800

100

6 – 12

50 – 200

200

5 – 8

50 – 160

230

4 – 6

70 – 220

2000

100

7 – 14

43 – 186

200

5 – 8

50 – 200

230

5 – 7

56 – 170

2200

100

7 – 15

47 – 200

200

6 – 9

44 – 167

230

5 – 7

84 – 186

2400

100

8 – 16

50 – 200

200

6 – 10

40 – 200

230

6 – 8

70 – 170


Sound attenuator casing with standard flange, L = 500, weights

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 2000 2400
mm kg

300

6

8

10

12

14

16

18

20

24

28

600

9

11

13

15

17

19

21

23

27

31

900

12

14

16

18

20

22

24

26

30

34

1200

15

17

19

21

23

25

27

29

33

37

1500

18

20

22

24

26

28

30

32

36

40

1800

21

23

25

27

29

31

33

35

39

43


Sound attenuator casing with standard flange, L = 750, weights

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 2000 2400
mm kg

300

8

10

13

16

19

22

25

27

33

38

600

13

15

18

21

24

26

29

31

36

42

900

17

19

22

25

28

30

33

35

40

46

1200

21

23

26

29

32

34

37

39

44

50

1500

25

27

30

33

36

38

41

43

48

54

1800

29

31

34

37

40

42

45

47

52

58


Sound attenuator casing with standard flange, L = 1000, weights

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 2000 2400
mm kg

300

10

14

17

20

24

27

30

34

41

48

600

15

19

22

25

29

32

35

39

46

53

900

20

24

27

30

34

37

40

44

51

58

1200

25

29

32

35

39

43

46

50

57

63

1500

30

34

37

40

44

48

51

55

62

68

1800

35

39

42

45

49

53

56

60

67

73


Sound attenuator casing with standard flange, L = 1250, weights

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 2000 2400
mm kg

300

13

17

21

25

29

33

37

41

49

58

600

19

23

27

31

35

39

43

47

54

64

900

25

29

33

37

41

45

49

53

60

70

1200

31

35

39

43

47

51

55

59

66

76

1500

37

41

45

49

53

58

62

65

72

82

1800

43

47

51

55

59

64

68

71

78

88


Sound attenuator casing with standard flange, L = 1500, weights

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 2000 2400
mm kg

300

15

19

24

29

33

39

44

48

58

68

600

22

26

31

36

40

46

51

55

65

75

900

30

34

39

44

48

53

58

62

72

82

1200

37

41

46

51

55

60

65

69

79

89

1500

44

48

53

58

62

68

73

77

87

97

1800

51

55

59

65

69

75

80

84

93

104


Sound attenuator casing with angle section frame, L = 500, weights

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 2000 2400
mm kg

300

9

13

16

19

23

25

28

32

39

45

600

14

18

21

24

28

30

33

37

44

50

900

18

22

25

28

32

35

38

42

49

55

1200

23

27

30

33

37

40

43

47

54

59

1500

28

32

35

38

42

45

48

52

59

64

1800

33

37

40

43

47

50

53

57

64

69


Sound attenuator casing with angle section frame, L = 750, weights

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 2000 2400
mm kg

300

8

12

16

20

24

25

29

33

41

45

600

13

17

21

25

29

30

34

38

46

50

900

17

21

25

29

33

35

39

43

51

55

1200

22

26

30

34

38

40

44

48

56

59

1500

27

31

35

39

43

45

49

53

61

64

1800

32

36

40

44

48

50

54

58

66

69


Sound attenuator casing with angle section frame, L = 1000, weights

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 2000 2400
mm kg

300

14

18

23

28

32

37

42

46

56

65

600

21

25

30

35

39

44

49

53

63

72

900

28

32

37

42

46

51

56

60

70

79

1200

35

39

44

49

53

58

63

67

77

86

1500

42

46

51

56

60

65

70

74

84

93

1800

49

53

58

63

67

72

77

81

91

100


Sound attenuator casing with angle section frame, L = 1250, weights

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 2000 2400
mm kg

300

15

21

26

31

37

42

47

53

63

75

600

23

29

34

39

45

51

56

62

72

83

900

31

37

42

47

53

59

64

70

80

91

1200

40

46

51

56

62

67

73

79

89

99

1500

48

54

59

64

70

75

80

86

96

107

1800

56

62

67

72

78

83

88

94

104

115


Sound attenuator casing with angle section frame, L = 1500, weights

H B [mm]
H 200 400 600 800 1000 1200 1400 1600 2000 2400
mm kg

300

18

24

30

36

42

48

54

60

72

85

600

27

33

39

45

51

57

63

69

81

94

900

36

42

48

54

60

66

72

78

90

103

1200

45

51

57

63

69

76

82

88

100

112

1500

54

60

66

72

78

85

91

97

109

122

1800

63

69

75

81

87

94

100

106

118

131


MKA100, weights

H Glass fibre fabric (-F) Glass fibre fabric and perforated sheet metal (-L)
H L [mm]
H 500 750 1000 1250 1500 500 750 1000 1250 1500
mm kg

300

2

3

4

5

6

3

4

5

6

8

600

4

5

7

8

10

5

7

9

11

13

900

5

7

9

11

13

7

10

13

16

18

1200

7

10

12

15

17

9

13

16

20

24

1500

8

12

15

18

21

11

16

20

25

29

1800

10

14

19

23

27

14

19

25

31

36


MKA200, weights

H Glass fibre fabric (-F) Glass fibre fabric and perforated sheet metal (-L)
H L [mm]
H 500 750 1000 1250 1500 500 750 1000 1250 1500
mm kg

300

4

5

6

7.5

9

4

6

7

9

11

600

6

8

10

12

15

7

10

12

15

18

900

8

11

14

17

20

10

14

17

21

25

1200

10

14

18

22

26

13

18

22

27

32

1500

13

17

22

27

31

15

21

27

33

40

1800

16

22

28

34

40

19

27

34

42

50


MKA230, weights

H Glass fibre fabric (-F) Glass fibre fabric and perforated sheet metal (-L)
H L [mm]
H 500 750 1000 1250 1500 500 750 1000 1250 1500
mm kg

300

4

5

7

8

10

5

6

8

10

12

600

6

9

11

14

16

8

11

13

16

19

900

9

12

16

19

22

11

15

19

23

27

1200

11

16

20

24

28

14

19

24

30

35

1500

14

19

24

29

34

17

23

30

36

43

1800

18

24

31

37

44

21

29

37

45

54


No. of flange holes per side of the angle section frame – width

B No. of holes
B n
mm

200 – 259

3

260 – 409

4

410 – 559

5

560 – 709

6

710 – 859

7

860 – 1009

8

1010 – 1159

9

1160 – 1309

10

1310 – 1459

11

1460 – 1609

12

1610 – 1759

13

1760 – 1909

14

1910 – 2059

15

2060 – 2209

16

2210 – 2359

17

2360 – 2400

18


No. of flange holes per side of the angle section frame – height

H No. of holes
H n
mm

150 – 299

1

300 – 449

2

450 – 599

3

600 – 749

4

750 – 899

5

900 – 1049

6

1050 – 1199

7

1200 – 1349

8

1350 – 1499

9

1500 – 1649

10

1650 – 1799

11

1800

12


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • Follow the installation information and comply with the general codes of good practice in order to achieve the given performance data
  • Up to height H = 1200 mm: 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
  • Installation in ducts outside of closed rooms requires sufficient protection against the effects of weather

Principal dimensions

ØD [mm]

Outer diameter of the spigot

ØD₃ [mm]

Outer diameter of circular silencers

L [mm]

Length of attenuator/silencer including spigot (in airflow direction)

L₁ [mm]

Length of acoustic cladding and acoustically effective length

B [mm]

Attenuator width and duct width (upright splitters)

H [mm]

Attenuator height and duct height (upright splitters)

T [mm]

Splitter thickness

S [mm]

Airway width

n [ ]

Number of flange screw holes

m [kg]

Weight

Nomenclature

fm [Hz]

Octave band centre frequency

LWA [dB(A)]

A-weighted sound power level of air-regenerated noise

De [dB]

Insertion loss

V [m³/h] and [l/s]

Volume flow rate

Δpst [Pa]

Static differential pressure


All sound power levels are based on 1 pW.


All values were measured in a TROX lab and to EN ISO 7235. Intermediate values may be achieved by interpolation.


Lab measurements exceeding 50 dB are indicated as 50 dB, in line with common practice.

Referenze

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Il nostro dipartimento per la gestione delle richieste ti contatterà appena possibile.
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Tel.: +41 26 425 59 00 | Fax: +41 55 250 73 10 | Fax Fribourg: +41 26 425 59 01