CA
TX
June 24, 2022
CB
June 24, 2022CA
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 protection 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
Description
Application
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
Description
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
Accessories
- GE: Matching flange for one end
- GZ: Matching flanges for both ends
- VD2: With lip seals on both ends
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 protection 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
Maintenance
- Maintenance-free as construction and materials are not subject to wear
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