CK-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

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

CK 

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

Circular silencer with sound absorbing splitter providing increased insertion loss

  • Aerodynamic splitter provides increased insertion loss
  • Choice of various splitter thicknesses ensures best possible application
  • Attenuation effect due to absorption
  • The sound absorbing material is non-combustible mineral wool and nonhazardous 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 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
  • Choice of 2 splitter widths for each nominal diameter
    • Increased insertion loss with a wider splitter
    • Reduced differential pressure with a smaller splitter
  • The sound absorbing material is non-combustible
  • Insulation thickness 50 mm 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: 250, 315, 400, 450, 500, 560, 630, 710, 800, 900, 1000 mm
  • L: 500, 1000, 1500 mm


Variants

Insulation thickness

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


Splitter width

  • T: 50, 100, 150, 200, 250, 300 mm


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 tube
  • Splitter
  • Absorption material


Construction features

  • Circular casing
    • Outer duct: spiral duct, galvanised steel 1.0917
    • Outer duct: plain duct, stainless steel 1.4301
  • Splitter
    • Aerodynamic shape, galvanised steel 1.0917 or 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

  • Spitter made of galvanised sheet steel 1.0917 or stainless steel 1.4301
  • 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, 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

    • Protection against erosion from airflow velocities up to 20 m/s

      • Inner duct with non-woven fibre (fleece)

      • Splitters faced with glass fibre scrim

    • 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

Insulation thickness

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


Splitter width

  • T: 50, 100, 150, 200, 250, 300 mm


Parts and characteristics

  • Circular casing
  • Perforated inner tube
  • Splitter
  • Absorption material


Construction features

  • Circular casing
    • Outer duct: spiral duct, galvanised steel 1.0917
    • Outer duct: plain duct, stainless steel 1.4301
  • Splitter
    • Aerodynamic shape, galvanised steel 1.0917 or 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: 250, 315, 400, 450, 500, 560, 630, 710, 800, 900, 1000 mm
  • L: 500, 1000, 1500 mm


Műszaki információk

Technical data, Quick sizing, Specification text, Order code

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

Nominal sizes250 – 1000 mm
Operating pressure2000 Pa max.
Operating temperature90 °C max.


The stated differential pressures for circular silencers vary, they depend on the splitter and the duct diameter.

Insulation thickness 50 mm, insertion loss De [dB]

Nominal size

Nominal length

Splitter width

Centre frequency fm [Hz]

63

125

250

500

1000

2000

4000

8000

25050050125102023158
2505001002371223282113
25010005035101938443015
250100010046142344504026
25015005047152850504322
250150010069203350505037
315500501249192194
315500100236102423166
315100050249173640188
315100010045112047452512
31515005035122450502511
315150010068162950503718
4005001001147171783
4005001503613243525169
4001000100237143232156
4001000150611244550483017
40015001003410214647229
4001500150815355050504425



 Insulation thickness 100 mm, insertion loss De [dB]

Nominal size

Nominal length

Splitter width

Centre frequency fm [Hz]

63

125

250

500

1000

2000

4000

8000

250500501591643463319
25050010026111826292517
25010005039173043463319
2501000100411203550504933
250150050413254422241710
2501500100616295050505048
3155005014815182095
315500100259162322137
3151000502815283438189
3151000100410173144432614
315150050311214150502614
3151500100614254550503720
40050010013612211585
400500150248162418128
400100010025122340291610
400100015047163246352315
400150010037183350422315
4001500150611244650503321
45050010012511181264
45050015022613211585
45010001002310223522128
450100015044122541281610
450150010034153150321712
450150015056173650412315
50050015012612181375
50050020023714201597
500100015024112335241410
500100020045132638291813
500150015036163350352115
500150020057183850422619
56050015013612141065
56050020024713161376
56010001502612232820119
560100020047132531241411
560150015039183340291613
5601500200510193645352016
6305002001261214965
63050025023714161186
630100020024112427171210
630100025035132631211512
630150020036163439251815
630150025058193845302118
7105002001251212755
7105002502261313865
71010002002310232314109
710100025034112525161110
710150020035143334201513
710150025056173637231615
8005002501261211755
8005003002371213765
80010002502412232213109
800100030035132425141110
800150025026173332181513
800150030058193536201615
900500250126119644
9005003002261210654
9001000250241121181188
9001000300341223201198
900150025025163126161211
900150030046183328171312
1000500300126118554
10001000300341220161097
1000150030046182924141311


 

Differential pressure Δpt [Pa]

Nominal size

Splitter width

qv

Nominal length

l/s

m3/h

500

1000

1500

2505019470091010
250100194700374244
250503331200252829
2501003331200109121127
315503331200445
3151003331200344
3155010003600323537
31510010003600262931
4001003891400121314
4001503891400192122
4001008333000546063
4001508333000859499
4501006112200182021
4501506112200262930
45010011114000606670
45015011114000849398
5001507782800101111
5002007782800212325
50015015565600384244
50020015565600849398
56015010003600101111
56020010003600182021
56015022228000455052
560200222280008695100
63020012504500141617
63025012504500303435
63020020837500394345
63025020837500849398
71020015565600111213
71025015565600171920
710200347212500546063
710250347212500839296
8002502000720091010
80030020007200171920
800250450016200434850
800300450016200849398
90025025009000111213
90030025009000161819
900250583321000576367
9003005833210008695100
1000300312511250192223
10003006667240008796101

Circular silencers with integral splitter for better acoustic performance, rigid construction, for ventilation and air conditioning systems, available in 11 nominal sizes and with 2 insulation thicknesses.
Insertion loss measured according to ISO 7235.
Casing with acoustic and thermal insulation.
Galvanised steel or stainless steel.
Optimised differential pressure upstream and downstream of the integral splitter due to the aerodynamic shape.
Choice of splitter widths for optimised differential pressure or increased insertion loss.
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
  • Choice of 2 splitter widths for each nominal diameter
    • Increased insertion loss with a wider splitter
    • Reduced differential pressure with a smaller splitter
  • The sound absorbing material is non-combustible
  • Insulation thickness 50 mm 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

  • Spitter made of galvanised sheet steel 1.0917 or stainless steel 1.4301
  • 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, 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

    • Protection against erosion from airflow velocities up to 20 m/s

      • Inner duct with non-woven fibre (fleece)

      • Splitters faced with glass fibre scrim

    • 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: 250, 315, 400, 450, 500, 560, 630, 710, 800, 900, 1000 mm
  • Insulation thickness: 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]


CKA2/D2/315×1500/10050
|||||||
1234567

1 Type
CK Circular silencer with splitter 

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]
250, 315, 400, 450, 500, 560, 630, 710, 800, 900, 1000 

5 Nominal length [mm]
500, 1000, 1500 

6 Insulation thickness [mm]
50, 100 

7 Splitter width [mm]
50, 100, 150, 200, 250, 300


Order example: CK–A2/D2/315×1500/100–50

MaterialGalvanised steel (1.0917)
MaterialStainless steel (1.4301)
Type of connectionSpigot with lip seal on both ends
Nominal size [mm]315
Length [mm]1500
Insulation thickness [mm]100
Splitter width [mm]50

Dimensions and weight, Installation details

  • DIMENSIONS AND WEIGHT
  • INSTALLATION DETAILS
CK: Dimensions:  CK: Dimensions: 

Illustration showing connection type AS 

CK: Dimensions

NS

ØD

Insulation thickness 50

Insulation thickness 100

ØD2

ØD3

ØD2

ØD3

250249250354250455
315314315405315505
400399400505400605
450448450636
500498500716
560558560806
630628630806
710708710908
8007988001008
9008989001128
100099810001258
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

CK: Lengths

LN

L

L1

500

500

380

1000

1000

880

1500

1500

1380



CK-0: Weight without splitter [kg]
NSInsulation thickness 50Insulation thickness 100
LN
5001000150050010001500
2506111591521
31581420101724
400101725142536
450152637
500183144
560203550
630213752
710264768
800305377
900356391
10003869101

CK-A2: Weight without splitter [kg]
NSInsulation thickness 50Insulation thickness 100
LN
NS5001000150050010001500
2507121791522
31581421101825
400101826132332
450142433
500162840
560183245
630203447
710233854
800264462
900305375
1000345984

CK-...×500: Weight of splitter [kg]
LN 500T
NS50100150200250300
25012
31512
4002

3

45023
50034
56034
63056
71056
80078
90089
100010

CK-...×1000: Weight of splitter [kg]
LN 1000T
NS50100150200250300
25023
31523
4004

5

45045
50057
56067
630810
710910
8001113
9001215
100016

CK-...×1500: Weight of splitter [kg]
LN 1500T
NG50100150200250300
25034
31534
4005

7

45057
500810
560810
6301114
7101215
8001619
9001821
100022

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.

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