CA | TROX Malaysia Sdn Bhd.

Attenuators

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 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 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

ÿD: 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: Plain outer duct made of galvanised sheet 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

Plain outer duct made of galvanised sheet steel 1.0917 or stainless steel 1.4301
Perforated inner duct made of galvanised steel 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 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

Technical information

This specification text describes the general properties of the product. Texts for variants can be generated with our Easy Product Finder design program.

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 3 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

Plain outer duct made of galvanised sheet steel 1.0917 or stainless steel 1.4301
Perforated inner duct made of galvanised steel 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 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

ÿD [mm]
L [mm]
L1
[mm]
qv
[m³/h]
De
[dB]
pst [Pa]

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: CA3A2/D2/160×1000/50

Order example: CA/200×1000/50

Downloads

product information

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