CA | TROX GmbH

Spigot with groove

Spigot with lip seal

Socket-type spigot

CA

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

For the reduction of air-regenerated noise of air terminal units LVC, TVR, TVE and of mechanical self-powered control units 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 characteristics

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 control units

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 silencers

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
Sound absorbing material

Construction features

Circular casing: Outer tube made of sheet metal in smooth finish, optionally made of 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

Material and surfaces

Smooth casing pipe made of galvanised sheet steel 1.0917 or stainless steel 1.4301

Perforated inner duct made of galvanised steel 1.0917 or stainless steel 1.4301
Spigot made of galvanised 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 of air-regenerated noise tested according 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 according to DIN EN 15727

Maintenance

Low-maintenance as construction and materials are not subject to wear

Technical information

Technical data, Quick sizing, Specification text, Order code

Nominal sizes	80 – 800 mm
Operating pressure	2000 Pa max.
Operating temperature	90 °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 D_e [dB]

Nominal size	Nominal length	Centre frequency f_m [Hz]
Nominal size	Nominal length	63	125	250	500	1000	2000	4000	8000
80	500	1	2	4	8	15	20	22	13
80	1000	1	5	9	17	30	42	38	32
100	500	1	2	4	8	15	20	22	13
100	1000	1	5	9	17	30	42	38	22
125	500	1	2	3	8	14	18	19	11
125	1000	1	4	8	15	27	39	32	19
160	500	1	1	3	7	13	17	14	9
160	1000	1	3	7	13	25	35	25	15
200	500	1	1	3	6	12	15	11	7
200	1000	1	3	6	12	21	32	19	12

Insulation thickness 50 mm, insertion loss D_e [dB]

Nominal size	Nominal length	Centre frequency fm [Hz]
Nominal size	Nominal length	63	125	250	500	1000	2000	4000	8000
100	500	3	5	8	14	23	28	16	13
100	1000	5	8	14	26	42	48	34	23
125	500	3	4	7	12	21	24	13	11
125	1000	4	7	12	23	38	41	28	20
160	500	2	3	6	11	19	19	9	8
160	1000	3	5	10	20	34	33	21	16
200	500	2	3	5	9	17	14	6	6
200	1000	3	4	8	17	31	25	15	12
250	500	1	2	4	8	15	10	3	4
250	1000	2	3	6	14	27	18	9	9
250	1500	3	4	9	20	40	26	15	13
315	500	1	1	3	7	12	8	2	3
315	1000	1	2	5	12	24	12	7	6
315	1500	1	3	7	18	35	16	12	9
400	500	1	1	3	5	12	6	1	3
400	1000	1	2	4	10	22	10	4	5
400	1500	1	2	6	15	32	13	8	7

Insulation thickness 100 mm, insertion loss D_e [dB]

Nominal size	Nominal length	Centre frequency fm [Hz]
Nominal size	Nominal length	63	125	250	500	1000	2000	4000	8000
100	500	4	8	12	18	35	32	24	13
100	1000	6	16	24	35	50	50	41	24
125	500	4	7	11	17	32	27	20	11
125	1000	5	14	21	32	48	45	34	20
160	500	3	6	10	16	28	22	15	9
160	1000	4	12	19	30	43	36	26	16
200	500	3	5	8	15	25	17	10	7
200	1000	4	10	16	28	38	29	19	13
250	500	2	4	7	14	22	13	6	5
250	1000	3	8	14	26	32	21	12	9
250	1500	4	11	22	38	43	30	18	14
315	500	2	3	6	13	19	10	5	4
315	1000	3	6	12	24	27	15	7	7
315	1500	3	8	18	34	35	20	10	9
400	500	2	3	6	12	18	8	3	3
400	1000	2	5	11	22	24	12	5	5
400	1500	3	7	16	32	31	17	8	7
450	1000	2	5	10	22	23	11	4	5
450	1500	3	7	15	31	29	15	7	7
500	1000	2	4	10	21	22	10	4	4
500	1500	2	6	14	31	28	14	6	6
560	1500	2	6	13	30	26	12	5	5
630	1500	2	5	12	29	24	10	4	4
710	1500	2	4	11	28	22	9	3	4
800	1500	1	4	10	27	20	7	2	3

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 – D (depending on size) to EN 15727.

Special characteristics

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

Material and surfaces

Smooth casing pipe made of galvanised sheet steel 1.0917 or stainless steel 1.4301

Perforated inner duct made of galvanised steel 1.0917 or stainless steel 1.4301
Spigot made of galvanised 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 silencers

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]
q_v [m³/h]
D_e [dB]
Δp_st [Pa]

CA	–	A2	/	D2	/	160	×	1000	/	50
\|		\|		\|		\|		\|		\|
1		2		3		4		5		6

1 Type
CA 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: CA–A2/D2/160×1000/50

Type	CA
Material	Stainless steel (1.4301)
Type of connection	Spigot with lip seal on both ends
Nominal size [mm]	160
Length [mm]	1000
Insulation thickness [mm]	50

Order example: CA/200×1000/50

Type	CA
Material	Galvanised steel (1.0917)
Type of connection	Spigot with lip seal on both ends
Nominal size [mm]	200
Length [mm]	1000
Insulation thickness [mm]	50

Installations details

Installation details

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

Product datat sheet CA

CA_PD_2024_04_03_DE_en Product data sheet 250 KB pdf

certificates

Declaration of hygiene conformity CA

CA_CAH_HC_2022_10_22_DE_en Hygiene certificate 680 KB pdf
Environmental Product Declaration CA

CA_EPD_2024_03_DE_en Environmental Product Declarations 370 KB pdf
ATEX manufacturer's statement CA

CA-ATEX_HC_2022_06_28_DE_en Manufacturer's statement 1,5 MB pdf
Non-CE Manufacturer's statement CA

CA_NotCE_2022_06_28_09_56_55_DE_en Certificate 1,5 MB pdf

operation manuals

Installation manual CA

CA_IM_A00000071256_V2_2024_01_GB_en Installation manual 330 KB pdf

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CA

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

General information

Technical information

Technical data, Quick sizing, Specification text, Order code

Installations details

Installation details

DOWNLOADS

product information

Product datat sheet CA

certificates

Declaration of hygiene conformity CA

Environmental Product Declaration CA

ATEX manufacturer's statement CA

Non-CE Manufacturer's statement CA

operation manuals

Installation manual CA

TECHNICALLY NECESSARY

STATISTICS AND WEBSITE ANALYSIS

CONVENIENCE AND PERSONALISATION

FOR THE BEST TROX EXPERIENCE