CA_img_01psd.png
CA_img_01psd.png

CA

For the reduction of noise in circular ducts, galvanised sheet steel construction

Circular silencers Type CA for the reduction of noise in the circular ducts of air conditioning systems

  • 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 pection against erosion due to airflow velocities up to 20 m/s
  • Casing and perforated inner duct are galvanised sheet steel
  • Variant with spigot has a groove for a lip seal, suitable for circular connecting ducts to EN 1506 or EN 13180
  • Insertion loss measured according to ISO 7235
  • Casing air leakage to EN 15727, class B

Optional equipment and accessories

  • With flanges on both ends
  • With lip seals on both ends

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General information

Application

  • Circular silencers Type CA for the reduction of noise in the circular ducts of air conditioning systems
  • For the reduction of air-regenerated noise of air terminal units such as LVC and TVR, and of mechanical self-powered controllers such as 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
  • Absorption material is non-combustible
  • Insulation thickness 50 mm or 100 mm


Nominal sizes

  • 100, 125, 160, 200, 250, 315, 400, 450, 500, 560, 630, 710, 800 mm

For VAV terminal units and CAV controllers

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


Variants

  • 050: Circular silencer with 50 mm insulation
  • 100: Circular silencer with 100 mm insulation
  • VF1: Circular silencer with flange on one end
  • VF2: Circular silencer with flanges on both ends


Parts and characteristics

  • Casing
  • Perforated inner tube
  • Absorption material


Construction features

  • Circular casing




  • Spigot suitable for circular ducts to EN 1506 or EN 13180




  • Spigot with groove for lip seal




  • Max. operating pressure 1000 Pa




  • Max. operating temperature 100 °C



Construction features

  • Circular casing
  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Spigot with groove for lip seal
  • Operating pressure up to 1000 Pa
  • Operating temperature up to 100 °C


Materials and surfaces

  • Casing and perforated inner duct are galvanised sheet steel
  • Lining 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 as pection 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 B


Nominal sizes

  • 100, 125, 160, 200, 250, 315, 400, 450, 500, 560, 630, 710, 800 mm

For VAV terminal units and CAV controllers

  • 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 sizes100 – 800 mm
Operating pressure1000 Pa max.
Operating temperature100 °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.

CA050 (insulation thickness 50 mm), insertion loss
Nominal sizeNominal lengthCentre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]
Nominal sizeNominal length631252505001000200040008000
Nominal sizeNominal lengthDeDeDeDeDeDeDeDe
Nominal sizemmHzHzHzHzHzHzHzHz
1005003581423301813
100100049152742504325
1255003471221231210
125100047122338422920
16050023610181788
16010003591934301815
2005001259161356
20010002481631221211
2505001248141034
250100023614281789
25015002481939231312
315500113712723
315100012512251356
315150023717351799
400500113611612
400100012410221035
400150012614311367
CA100 (insulation thickness 100 mm), insertion loss
Nominal sizeNominal lengthCentre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]Centre frequency fm [Hz]
Nominal sizeNominal length631252505001000200040008000
Nominal sizeNominal lengthDeDeDeDeDeDeDeDe
Nominal sizemmHzHzHzHzHzHzHzHz
10050049121835332614
1001000517243550504725
12550047101731261911
1251000514213248443320
160500369152820138
1601000511183042332215
20050035815251697
200100049162838261612
25050024714211365
25010003814263321119
2501500411213741271512
31550023613181044
3151000361224291687
31515003918343521109
4005001361217833
4001000251123251255
4001500371632311677
4501000251022231145
4501500261531291466
5001000241021221044
5001500261430271356
5601500251329251145
6301500251228231044
710150025112722934
800150024112620823
CA, differential pressure
Nominal sizeqᵥqᵥNominal length [mm]Nominal length [mm]Nominal length [mm]
Nominal sizeqᵥqᵥ50010001500
Nominal sizeqᵥqᵥ∆pst∆pst∆pst
Nominal sizel/sm³ /hPaPaPa
1003010822
1006021648
10075270612
10090324818
1255018022
1259534246
125120432610
125145522614
1608028822
16015555826
16019570248
160235846610
20012545022
20024588224
200310111646
200370133248
250195702<2<2<2
2503851386<244
2504851746246
2505802088468
3153101116<2<2<2
3156152214<224
3157702772<244
3159253330246
4005001800<2<2<2
4009953582<2<22
40012454482<224
40014955382<244
4506302268<2<2
45012604536<2<2
45015755670<24
4501890680424
5007802808<2<2
50015605616<22
5001950702022
5002335840624
5609803528<2
56019557038<2
560244588022
5602935105664
63012404464<2
63024808928<2
630309511142<2
630371513374<2
71015755670<2
710315011340<2
710393514166<2
710472517010<2
80020007200<2
800400014400<2
800500018000<2
800600021600<2

CA050 (Packungsdicke 50 mm), Einfügungsdämpfung De [Hz]

NGLN631252505001000200040008000
100500358143018
10010004915275043
125500347122312
12510004712234229
16050023610178
1601000359193018
2005001259135
2001000248162212
2505001248103
250100023614178
2501500248192313
315500113772
315100012512135
315150023717179
400500113661
400100012410103
400150012614136

① Mittenfrequenz fm


CA100 (Packungsdicke 100 mm), Einfügungsdämpfung De [Hz]

NGLN631252505001000200040008000
1005004912183326
100100051724355047
1255004710172619
125100051421324433
160500369152013
160100051118303322
20050035815169
20010004916282616
25050024714136
25010003814262111
250150041121372715
31550023613104
3151000361224168
31515003918342110
4005001361283
4001000251123125
4001500371632167
4501000251022114
4501500261531146
5001000241021104
5001500261430135
5601500251329114
6301500251228104
710150025112793
800150024112682

① Mittenfrequenz fm


CA, Druckdifferenz Δpst [PA]

NGqᵥ [l/s]qᵥ [m³/h]50010001500
1003010822
1006021648
10075270612
10090324818
1255018022
1259534246
125120432610
125145522614
1608028822
16015555826
16019570248
160235846610
20012545022
20024588224
200310111646
200370133248
250195702<2<2<2
2503851386<244
2504851746246
2505802088468
3153101116<2<2<2
3156152214<224
3157702772<244
3159253330246
4005001800<2<2<2
4009953582<2<22
40012454482<224
40014955382<244
4506302268<2<2
45012604536<2<2
45015755670<24
4501890680424
5007802808<2<2
50015605616<22
5001950702022
5002335840624
5609803528<2
56019557038<2
560244588022
5602935105664
63012404464<2
63024808928<2
630309511142<2
630371513374<2
71015755670<2
710315011340<2
710393514166<2
710472517010<2
80020007200<2
800400014400<2
800600018000<2
800800021600<2

① Druckdifferenz

Circular silencers for air conditioning systems, rigid construction, available in 13 nominal sizes.

Insertion loss measured according to ISO 7235.

Casing with acoustic and thermal insulation.

Various types of connection, suitable for circular ducts to EN 1506 or EN 13180.

Casing air leakage to EN 15727, class B.


Special features

  • Insertion loss measured according to ISO 7235
  • Absorption material is non-combustible
  • Insulation thickness 50 mm or 100 mm


Materials and surfaces

  • Casing and perforated inner duct are galvanised sheet steel
  • Lining 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 as pection against erosion through airflow velocities up to 20 m/s
  • Inert to fungal and bacterial growth


Parts and characteristics

  • Casing




  • Perforated inner tube




  • Absorption material



Materials and surfaces

  • Casing and perforated inner duct are galvanised sheet steel
  • Lining 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 as pection against erosion through airflow velocities up to 20 m/s
  • Inert to fungal and bacterial growth


Technical data

  • Nominal sizes: 100 to 800 mm
  • Operating pressure: 1000 Pa max.
  • Operating temperature: 100 °C max.


Sizing data

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

CA050/315×1000/GZ/VF2
||||||
123456

1 TypeCA Circular silencer 2 Insulation thickness [mm]050 50100 100 3 Nominal size [mm]100, 125, 160, 200, 250, 315, 400, 450, 500, 560, 630, 710, 800 4 Nominal length [mm]500, 1000, 1500 5 Matching flangeNo entry required: NoneGE on one end (only VF1)GZ on both ends (only VF2) 6 Type of connectionNo entry: SpigotVD2 Spigot with lip seal on both endsVF1 Flange on one endVF2 Flanges on both ends

Order example: CA100/315×1500/GZ/VF2
Insulation thickness100 mm
Nominal size315 mm
Length1500 mm
Matching flangeBoth ends
Type of connectionFlanges on both ends

Variants, Dimension and Weight, Product Details

  • VARIANTS
  • DIMENSION AND WEIGHT
  • PRODUCT DETAILS

CA


 


Variant

  • Rohrschalldämpfer zur Geräuschreduzierung
  • Rohrstutzen zum Anschluss der Luftleitungen

,

CA/.../VF1


 


Variant

  • Rohrschalldämpfer zur Geräuschreduzierung
  • Einseitig mit Rohrstutzen zum Anschluss der Luftleitungen
  • Einseitig mit Flansch zum lösbaren Anschluss der Luftleitungen

,

CA/.../VF2


 


Variant

  • Rohrschalldämpfer zur Geräuschreduzierung
  • Beidseitig mit Flansch zum lösbaren Anschluss der Luftleitungen


,
NG∅D₃ (CA-050)∅D₃ (CA-100)∅D
10019929999
125224324124
160259359159
200299399199
250349449249
315414514314
400499599399
450648448
500698498
560758558
630828628
710908708
800998798
,
NGLL₁
500500380
10001000880
150015001380
,
CA-050CA-100
NG5001000150050010001500
10047611
12559713
1607012916
200713917
25091622112029
315122028142535
400152534183042
4503346
5003652
56055
63062
71068
80076
,,
NG∅D₃ (CA-050)∅D₃ (CA-100)∅D∅D₁∅D₂nD
1001992999913215244
12522432412415717744
16025935925919221264
20029939919923325364
25034944924928330364
31541451431435237884
40049959939943846484
,
NGLL₁
500490380
1000990880
150014901380
,
CA-050CA-100
NG5001000150050010001500
10047611
12559713
1608131017
250101723122130
315132129152636
400162635193143
4503447
5003854
56057
63064
71071
80079
2008141018

,
NG∅D₃ (CA-050)∅D₃ (CA-100)∅D∅D₁∅D₂nD
1001992999913215244
12522432412415717744
16025935915919221264
20029939919923325364
25034944924928330364
31541451431435237884
40049959939943846484
45064844848851484
50069849853856484
560758558600634124
630828628670704124
710908708750784124
800998798840874164
,
NGLL₁
500480380
1000980880
150014801380
,
CA-050CA-100
NG5001000150050010001500
10047611
125610814
1608131017
2008141018
250101723122130
315142230162737
400182837213345
4503649
5003955
56059
63067
71073
80082

Installation and commissioning

  • Any installation orientation
  • Installation in ducts outside of closed rooms requires sufficient pection against the effects of weather

Downloads

product information

certificates

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Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
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