General Information
Application
- Plastic circular silencers Type CAK for the reduction of noise in the circular ducts of air conditioning systems
- Suitable for contaminated air
- For the reduction of air-regenerated noise of air terminal units TVRK and TVLK
- For the reduction of fan noise
Special features
- Insertion loss measured according to ISO 7235
- Absorption material is non-combustible
Nominal sizes
- 5, 6, 8, 10, 12, 16 in
Variants
- CAK: Circular silencer
- VF2: Circular silencer with flanges on both ends
Parts and characteristics
- Casing
- Perforated inner tube
- Absorption material
Accessories
- Matching flanges for both ends, including seals
Construction features
- Circular casing
- Spigot suitable for circular ducts according to DIN 8077 or DIN 8078
- Maximum operating pressure 4.02 in w.g.
- Max. operating temperature 212 °F
Materials and surfaces
- Casing and perforated inner duct are flame-resistant polypropylene (PPs) to DIN 4102, building class B1
- 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/EC
- Faced with glass fibre as protection against erosion through airflow velocities up to 3937 fpm
- Inert to fungal and bacterial growth
Standards and guidelines
- Insertion loss measured according to ISO 7235
- Casing air leakage to EN 15727, class D
Maintenance
- Maintenance-free as construction and materials are not subject to wear
