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 absorption and resonance
- Broadband attenuation even in the low frequency range of critical fan noise
- Hygiene tested and compliant with VDI 6022
- For use in areas with potentially explosive atmospheres (EC Directive 2014/34/EU (ATEX)), zones 1, 2, 21 and 22 (outside) according to Directive 1999/92/EC
Special characteristics
Resonating panels ensure increased insertion loss in the frequency range of critical fan noise
- Energy savings due to aerodynamically formed splitter frame
- Up to 30 % lower differential pressure
- Hygiene tested and compliant with VDI 6022
- Multi-section construction available for large dimensions
Nominal sizes
- H: 6 – 98 in
- L: 20, 30, 39, 49, 59, 69, 79, 89, 98 in
- Intermediate sizes of H and L are possible: 6 – 98 in in increments of 0.04 in
- Undivided construction: H + L 24 in min., 157 in max., 220 lbs max.
- Dependency for H and L: If one dimension is greater than 59 in, the other one must not exceed 59 in
- Height or length subdivided in case of a deviation, and for sizes 98 – 197 in
- Height subdivided from H ≥ 98 in, otherwise length subdivided
Variants
- MK4: splitter thickness 4 in
- MK8: splitter thickness 8 in
- MK9: splitter thickness 9 in
Construction
Half of the splitter is covered by a resonator plate
- F: Glass fibre fabric
- L: Glass fibre fabric faced with expanded metal cover for additional mechanical protection of the sound absorbing material
Materials and surfaces
- No entry: galvanised steel 1.0917
- A2: stainless steel 1.4301
- Construction L: Glass fibre fabric with perforated metal facing for additional mechanical protection of the sound absorbing material
- P1: powder-coated, RAL 7001, silver grey
Parts and characteristics
- Aerodynamically profiled 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
- Absorption material and resonating panels fitted to reduce air-regenerated noise by absorption and resonance
Accessories
- U-sheets/clamp sheets to join subdivided attenuator splitters (included with subdivided splitter constructions)
Construction features
- 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; variant L up to 572 °F for 8h max.
Material and surfaces
- Splitter frame, centre mullion and resonating panels made of galvanised sheet steel 1.0917 or stainless steel 1.4301
- Expanded metal cover made of galvanised steel 1.0917
- Perforated metal facing made of stainless steel 1.4301
- 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
- Faced with glass fibre fabric, as a protection against erosion from airflow velocities of up to 3937 fpm
- 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
