Type CAK

For the reduction of noise in plastic circular ducts for contaminated air

Plastic circular silencers for the reduction of noise in the circular ducts of extract air systems for aggressive media

  • Absorption material is non-combustible mineral wool with RAL quality mark, biosoluble and hence hygienically safe according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
  • Mineral wool faced with non-woven glass fibre as protection against erosion due to airflow velocities up to 20 m/s
  • Casing and perforated inner duct are flame-resistant polypropylene (PPs) to DIN 4102, building class B1
  • Variant with spigot suitable for circular ducts according to DIN 8077 or DIN 8078
  • Insertion loss measured according to ISO 7235
  • Casing air leakage to EN 15727, class D


Optional equipment and accessories

  • With flanges on both ends

Circular silencer Type CAK 00137489_0


  • Application
  • Description

Application

  • Plastic circular silencers Type CAK for the reduction of noise in the circular ducts of air conditioning systems
  • Suitable for contaminated air
  • For the reduction of air-regenerated noise of air terminal units TVRK and TVLK
  • For the reduction of fan noise

Special features

  • Insertion loss measured according to ISO 7235
  • Absorption material is non-combustible

Nominal sizes

  • 125, 160, 200, 250, 315, 400 mm

Variants

  • CAK: Circular silencer
  • VF2: Circular silencer with flanges on both ends

Parts and characteristics

  • Casing
  • Perforated inner tube
  • Absorption material

Accessories

  • Matching flanges for both ends, including seals

Construction features

  • Circular casing
  • Spigot suitable for circular ducts according to DIN 8077 or DIN 8078
  • Maximum operating pressure 1000 Pa
  • Max. operating temperature 100 °C

Materials and surfaces

  • Casing and perforated inner duct are flame-resistant polypropylene (PPs) to DIN 4102, building class B1
  • Lining is mineral wool


Mineral wool

  • To EN 13501, fire rating class A2, 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 as protection against erosion through airflow velocities up to 20 m/s
  • Inert to fungal and bacterial growth

Standards and guidelines

  • Insertion loss measured according to ISO 7235
  • Casing air leakage to EN 15727, class D

Maintenance

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

Technical information

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

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

Nominal sizes

125 – 400 mm

Operating pressure

1000 Pa

Operating temperature

100 °C max.


The stated differential pressures for circular silencers correspond to the values for smooth pipes. Deviations, if any, are of no practical relevance.

For ductwork calculation, if the length of a circular silencer is included in the total length of the ductwork, no extra length must be added.

CAK, insertion loss

Nominal size Nominal length Centre frequency fm [Hz]
Nominal size Nominal length 63 125 250 500 1000 2000 4000 8000
Nominal size Nominal length De
Nominal size mm Hz

125

500

1

6

7

14

25

23

14

12

125

1000

2

9

13

22

34

35

24

16

125

1500

3

12

19

31

42

43

33

20

160

500

0

3

5

11

22

21

12

10

160

1000

1

4

9

18

30

31

19

13

160

1500

2

7

13

25

38

41

27

17

200

500

0

2

4

10

21

17

10

8

200

1000

1

4

9

15

29

25

16

11

200

1500

1

6

12

21

36

33

20

14

250

500

0

2

4

9

19

13

9

8

250

1000

0

4

8

14

26

22

15

11

250

1500

1

6

11

20

35

30

20

15

315

500

0

2

3

8

18

12

7

6

315

1000

0

4

6

14

26

17

11

8

315

1500

1

6

9

19

34

23

15

10

400

500

0

2

3

6

14

8

6

4

400

1000

0

3

6

11

25

13

10

7

400

1500

1

4

8

16

29

15

11

8


CAK, differential pressure

Nominal size V Nennlänge [mm]
Nominal size V 500 1000 1500
Nominal size V ∆pst
Nominal size l/s m³/h Pa

125

50

180

2

2

4

125

95

342

4

6

10

125

120

432

6

10

14

125

145

522

6

14

20

160

80

288

2

2

2

160

155

558

2

6

8

160

195

702

4

8

10

160

235

846

6

10

14

200

125

450

2

2

2

200

245

882

2

4

6

200

310

1116

4

6

8

200

370

1332

4

8

10

250

195

702

<2

<2

<2

250

385

1386

<2

4

4

250

485

1746

2

4

6

250

580

2088

4

6

8

315

310

1116

<2

<2

<2

315

615

2214

<2

2

4

315

770

2772

<2

4

4

315

925

3330

2

4

6

400

500

1800

<2

<2

<2

400

995

3582

<2

<2

2

400

1245

4482

<2

2

4

400

1495

5382

<2

4

4


Plastic circular silencers for use in extract air systems subject to aggressive media; they reduce the air-regenerated noise in plastic ducts (absorption principle).

Insertion loss measured according to ISO 7235.

Absorption material is mineral wool with RAL quality mark RAL-GZ 388.

Spigot, suitable for ducts according to DIN 8077.

Casing air leakage to EN 15727, class D.

Special features

  • Insertion loss measured according to ISO 7235
  • Absorption material is non-combustible

Materials and surfaces

  • Casing and perforated inner duct are flame-resistant polypropylene (PPs) to DIN 4102, building class B1
  • Lining is mineral wool


Mineral wool

  • To EN 13501, fire rating class A2, 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 as protection against erosion through airflow velocities up to 20 m/s
  • Inert to fungal and bacterial growth

Technical data

  • Nominal sizes: 125 to 400 mm
  • Operating pressure: 1000 Pa max.
  • Operating temperature: 100 °C max.

Sizing data

  • D _______________________ [mm]
  • H _______________________ [mm]
  • Insulation thickness __________ [mm]
  • V _______________________ [m³/h]
  • De at 250 Hz ________________ [dB]
  • Δpst _______________________ [Pa]

00130907_0

 Type
CAK       Circular silencer

 Nominal size [mm]
125
160
200
250
315
400

 

 Length [mm]
500
1000
1500

 Matching flange
       No entry: none
GZ       on both ends (only VF2)

 Type of connection
       No entry: spigot
VF2       Flanges on both ends

Order example: CAK/200×1000

Nominal size

200 mm

Length

1000 mm

Type of connection

Spigot


 

Variants, Dimensions and weight

  • Variants
  • Dimensions and weight

CAK

Variant

  • Circular silencer for the reduction of noise
  • Spigot

CAK/.../VF2

Variant

  • Circular silencer for the reduction of noise
  • With flanges to make detachable connections to the ductwork

CAK, dimensions

Nominal size
ØD
mm
ØD3
mm
ØD1
mm
ØD2
mm
n
T
mm
125 125 225 165 185 8 8
160 160 250 200 230 8 8
200 200 280 240 270 8 8
250 250 355 290 320 12 8
315 315 415 350 395 12 10
400 400 500 445 475 16 10


CAK, lengths

Nominal length
mm
LN
L
mm
L1
mm
500 595 495
1000 1095 995
1500 1595 1495


CAK, weights

Nominal size
500
m
kg
1000
m
kg
1500
m
kg
125 2.2 4.1 5.9
160 2.6 4.7 6.8
200 3.2 5.8 8.5
250 4.3 7.6 10.9
315 4.6 8.6 12.5
400 5.2 9.3 13.4


CAK/.../VF2, weights

Nominal size
500
m
kg
1000
m
kg
1500
m
kg
125 2.5 4.4 6.2
160 3.0 5.1 7.2
200 3.6 6.2 8.9
250 4.9 8.2 11.5
315 5.3 9.3 13.7
400 6.8 10.9 15.0


Installation details, Basic information and nomenclature

  • Installation details
  • Basic information and nomenclature

Installation and commissioning

  • Any installation orientation
  • 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.

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Visual contact Visual contact

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Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +971 4 3417448 | Fax: +971 4 3417449