CA

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 characteristics

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

Parts and characteristics

• Casing
• Perforated inner tube
• Absorption material

Accessories

• GE: Matching flange for one end
• GZ: Matching flanges for both ends
• VD2: Lip seals on both ends (factory fitted)

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 A2, 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/EG
• Faced with glass fibre as protection against erosion through airflow velocities up to 20 m/s
• Inert to fungal and bacterial growth