General Information
Application
- Sound attenuator splitters with resonating panels are used for the reduction of fan and air-regenerated noise in ventilation and air conditioning systems
- Attenuation effect due to resonance
- Attenuation particularly in the low frequency range of critical fan noise
- Hygiene tested and compliant with VDI 6022
- For use in areas with potentially explosive atmospheres (ATEX), zones 1, 2, 21 and 22 (outside) according to EC Directive 1999/92/EC.
Special characteristics
- Resonating panels ensure increased insertion loss in the frequency range of critical fan noise
- Energy-efficient due to aerodynamically formed splitter frame
- Up to 30 % lower differential pressure
- Hygiene tested and compliant with VDI 6022
Nominal sizes
- H: 6 – 71 in
- L: 20, 30, 39, 49, 59 in
- Intermediate sizes of H are possible: 6 – 71 in in increments of 0.04 in
- Intermediate lengths (L) are possible: 6 – 59 in in increments of 0.04
- H + L 24 in min., 130 in max., 176 lbs max.
- Height and length subdivided: not available
Variants
Principal attenuation range
- A: 250/125 Hz
- C: 125/63 Hz
Construction
Materials and surfaces
- No entry: Galvanised steel 1.0917
- P1: Powder-coated RAL 7001, silver grey
Parts and characteristics
- Aerodynamically formed frame
- Reduced weight and increased rigidity due to special profile
- Helps to optimise the airflow, hence reducing the air-regenerated noise
- Reduces the pressure loss
- Covers the edges of the sound absorbing material
- Resonating panels fitted to reduce air-regenerated noise by resonance
Construction features
- Sound absorbing material and resonating panels fitted to reduce air-regenerated noise by resonance
- Aerodynamically formed splitter frame (bullnose radius 0.8 in) that helps to reduce turbulence on both the upstream and downstream sides; frame with grooves for increased rigidity
- Frame edges with bullnose to protect the infill
- Operating temperature up to 212 °F, up to 572 °F for 8 h max.
Material and surfaces
- Splitter frame, centre mullion and resonator plates made of galvanised sheet steel 1.0917
- Sound absorbing material mineral wool
- According to EN 13501, fire rating class A1, non-combustible
- RAL quality mark RAL-GZ 388
- Non-hazardous thanks to high biosolubility according to the German Ordinance on Hazardous Substances and Note Q of the European Regulation (EC) No. 1272/2008
- 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.
Maintenance
- Low maintenance as construction and materials are not subject to wear
- Regular cleaning intervals according to VDI6022
