CA-EU-315_gc_01png.png
CA-160-KE_gc_07png.png

Spigot with groove

CA-160-D2_gc_06png.png

Spigot with lip seal

CK-315-AS_gc_03png.png

Socket-type spigot

CA-EU-315_gc_01png.png
CA-160-KE_gc_07png.png
CA-160-D2_gc_06png.png
CK-315-AS_gc_03png.png

CAH 

Circular silencers for the reduction of noise in circular ducts of ventilation and air conditioning systems

Circular silencer made of galvanised sheet steel or stainless steel

  • Attenuation effect due to absorption
  • The sound absorbing material is non-combustible mineral wool and non-hazardous to health according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC
  • Acoustic data measured to ISO 7235
  • Leakage class C or D (depending on size) 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

Optional equipment and accessories

  • Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180
  • Socket-type spigot suitable for circular ducts to EN 1506 or EN 13180

General information

Application

  • Circular silencer for the reduction of noise
  • For the reduction of air-regenerated noise of air terminal units LVC, TVR, TVE and of mechanical self-powered controllers RN and VFC
  • For the reduction of fan noise
  • Can be used as cross talk silencer to reduce the transfer of noise through ducts between neighbouring rooms

Special features

  • Insertion loss measured according to ISO 7235
  • The sound absorbing material is non-combustible
  • Insulation thickness 25, 50 or 100 mm
  • Leakage class D for nominal sizes up to and including 400 mm
  • Leakage class C from nominal size 450 mm


Nominal sizes

  • ØD: 80, 100, 125, 160, 200, 250, 315, 400, 450, 500, 560, 630, 710, 800 mm
  • L: 500, 1000, 1500 mm

For VAV terminal units and CAV controllers

  • ØD: 100, 125, 160, 200, 250, 315, 400 mm


Variants

  • 025: Circular silencer with 25 mm insulation
  • 050: Circular silencer with 50 mm insulation
  • 100: Circular silencer with 100 mm insulation


Construction

Circular silencer

  • No entry: galvanised steel 1.0917
  • A2: Stainless steel 1.4301

Type of connection:

  • No entry: spigot with groove on both ends
  • D2: Spigot with lip seal on both ends
  • AS: Spigot with lip seal and socket-type spigot on one end


Parts and characteristics

  • Circular casing
  • Perforated inner duct
  • Absorption material



Construction features

  • Circular casing
    • Outer duct: spiral duct, galvanised steel 1.0917
    • Outer duct: plain duct, stainless steel 1.4301
  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Lip seals up to nominal size 800
  • Max. operating pressure 2000 Pa
  • Max. airflow velocity 20 m/s
  • Max. operating temperature 90 °C



Materials and surfaces

  • Outer duct and perforated inner duct are spiral ducts made of galvanised sheet steel 1.0917
  • Plain outer duct made of stainless steel 1.4301
  • Perforated inner duct in stainless steel 1.4301
  • Spigot made of galvanised sheet steel 1.0917 or stainless steel 1.4301
  • Absorption material is mineral wool

    • To EN 13501-1, fire rating class A1, non-combustible

    • Non-hazardous to health according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC  

    • Inner duct with non-woven fibre (fleece) 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 level of air-regenerated noise tested 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


Description

Variants

  • 025: Circular silencer with 25 mm insulation
  • 050: Circular silencer with 50 mm insulation
  • 100: Circular silencer with 100 mm insulation


Parts and characteristics

  • Circular casing
  • Perforated inner duct
  • Absorption material


Construction features

  • Circular casing
    • Outer duct: spiral duct, galvanised steel 1.0917
    • Outer duct: plain duct, stainless steel 1.4301
  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Lip seals up to nominal size 800
  • Max. operating pressure 2000 Pa
  • Max. airflow velocity 20 m/s
  • Max. operating temperature 90 °C


Nominal sizes

  • ØD: 80, 100, 125, 160, 200, 250, 315, 400, 450, 500, 560, 630, 710, 800 mm
  • L: 500, 1000, 1500 mm

For VAV terminal units and CAV controllers

  • ØD: 100, 125, 160, 200, 250, 315, 400 mm


Technical information

Technical data, Quick sizing, Specification text, Order code

  • Technical data
  • QUICK SIZING
  • SPECIFICATION TEXT
  • ORDER CODE

Nominal sizes80 – 800 mm
Operating pressure2000 Pa max.
Operating temperature90 °C max.

The stated differential pressures for circular silencers apply to plain, unprofiled ducts. 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.

Insulation thickness 25 mm, insertion loss De [dB]

Nominal size

Nominal length

Centre frequency fm [Hz]

63

125

250

500

1000

2000

4000

8000

80500124815202213
8010001591730423832
100500124815202213
10010001591730423822
125500123814181911
12510001481527393219
160500

1

1371317149
16010001371325352515
200500

1

1361215117
20010001361221321912


Insulation thickness 50 mm, insertion loss De [dB]

Nominal sizeNominal lengthCentre frequency fm [Hz]
631252505001000200040008000
1005003581423281613
100100058142642483423
1255003471221241311
125100047122338412820
16050023611191998
160100035102034332116
2005002359171466
20010003481731251512
2505001248151034
250100023614271899
25015003492040261513
315500113712823
315100012512241276
3151500137183516129
400500113512613
400100012410221045
400150012615321387

 

Insulation thickness 100 mm, insertion loss De [dB]

Nominal sizeNominal lengthCentre frequency fm [Hz]
631252505001000200040008000
10050048121835322413
1001000616243550504124
12550047111732272011
1251000514213248453420
1605003610162822159
1601000412193043362616
200500358152517107
2001000410162838291913
25050024714221365
25010003814263221129
2501500411223843301814
31550023613191054
3151000361224271577
31515003818343520109
4005002361218833
4001000251122241255
4001500371632311787
4501000251022231145
4501500371531291577
5001000241021221044
5001500261431281466
5601500261330261255
6301500251229241044
710150024112822934
800150014102720723

Circular silencers for ventilation and air conditioning systems, rigid construction, available in 14 nominal sizes and with 3 insulation thicknesses
Insertion loss measured according to ISO 7235.
Casing with acoustic and thermal insulation.
Galvanised steel or stainless steel.
Various types of connection, suitable for circular ducts to EN 1506 or EN 13180.
Leakage class C or D (depending on size) to EN 15727.

Special features

  • Insertion loss measured according to ISO 7235
  • The sound absorbing material is non-combustible
  • Insulation thickness 25, 50 or 100 mm
  • Leakage class D for nominal sizes up to and including 400 mm
  • Leakage class C from nominal size 450 mm


Materials and surfaces

  • Outer duct and perforated inner duct are spiral ducts made of galvanised sheet steel 1.0917
  • Plain outer duct made of stainless steel 1.4301
  • Perforated inner duct in stainless steel 1.4301
  • Spigot made of galvanised sheet steel 1.0917 or stainless steel 1.4301
  • Absorption material is mineral wool

    • To EN 13501-1, fire rating class A1, non-combustible

    • Non-hazardous to health according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC  

    • Inner duct with non-woven fibre (fleece) 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

Circular silencer

  • No entry: galvanised steel 1.0917
  • A2: Stainless steel 1.4301

Type of connection:

  • No entry: spigot with groove on both ends
  • D2: Spigot with lip seal on both ends
  • AS: Spigot with lip seal and socket-type spigot on one end


Technical data

  • Nominal size: 80, 100, 125, 160, 200, 250, 315, 400, 450, 500, 560, 630, 710, 800 mm
  • Insulation thickness: 25, 50, 100 mm 
  • Nominal length: 500, 1000, 1500 mm
  • Operating pressure: 2000 Pa max.
  • Airflow velocity: 20 m/s max.
  • Operating temperature: 90 °C max.


Sizing data

  • ØD [mm]
  • L [mm]
  • L1 [mm]
  • qv [m³/h]
  • De [dB]
  • Δpst [Pa] 

CAHA2/D2/160×1000/50
||||||
123456
1 Type
CAH Circular silencer
 
2 Material
No entry: galvanised steel (1.0917)
A2 Stainless steel (1.4301)
 
3 Type of connection
No entry: spigot with groove on both ends
D2 Spigot with lip seal on both ends
AS Spigot with lip seal and socket-type spigot on one end
 
4 Nominal size [mm]
80, 100, 125, 160, 200, 250, 315, 400, 450, 500, 560, 630, 710, 800
 
5 Nominal length [mm]
500, 1000, 1500
 
6 Insulation thickness [mm]
25, 50, 100


Order example: CAH–A2/D2/160×1000/50
TypeCAH
MaterialStainless steel (1.4301)
Type of connectionSpigot with lip seal on both ends
Nominal size [mm]160
Length [mm]1000
Insulation thickness [mm]50

Dimensions and weigth, Installation details

  • DIMENSIONS AND WEIGHT
  • INSTALLATION DETAILS
Dimensions Dimensions

Schematic illustration showing connection type AS

Dimensions

NS

ØD

Insulation thickness 25

Insulation thickness 50

Insulation thickness 100

ØD2

ØD3

ØD2

ØD3

ØD2

ØD3

80798012980184
10099100154100204100304
125124125184125228125319
160159160204160254160354
200199200254200304200405
250249250354250455
315314315405315505
400399400505400605
450448450636
500498500716
560558560806
630628630806
710708710908
8007988001008
No entry: spigot with groove to EN1506 ØD
D2: Spigot with groove to EN1506 ØD
AS: Spigot with lip seal ØD and socket-type spigot on one end ØD2

Lengths

LN

L

L1

500

500

380

1000

1000

880

1500

1500

1380



Spiral duct casing: weights [kg]
NSInsulation thickness 25Insulation thickness 50Insulation thickness 100
LN
50010005001000150050010001500
802435
100343558
125354659
1604647610
2004759713
2506111591521
31581420101724
400101725142536
4502637
5003144
56050
63052
71068
80077

Plain casing: weights [kg]
NSInsulation thickness 25Insulation thickness 50Insulation thickness 100
LN
50010005001000150050010001500
803436
100354659
1253647610
1604758711
20058610813
2507121791522
31581421101825
400101826132332
4502433
5002840
56045
63047
71054
80062

Installation and commissioning

  • Follow the installation manual and comply with the general codes of good practice in order to achieve the given performance data
  • Installation in ducts outside closed rooms requires sufficient protection against the effects of weather
  • Due to its weight the silencer must be supported, e.g. by a suitable fixing system.

Downloads

product information

certificates

References

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