MK

Sound attenuator splitters with resonating panels, ready to be used in ventilation and air conditioning systems

Attenuation effect due to absorption and resonance
Energy efficient due to aerodynamically formed frame (bullnose radius 20 mm)
Acoustic data measured to EN ISO 7235
Sound absorbing material is biosoluble and hence hygienically safe
Sound absorbing material faced with glass fibre fabric as a protection against erosion due to airflow velocities up to 20 m/s
The sound absorbing material is non-combustible, to EN 13501, fire rating class A1
For use in areas with potentially explosive atmospheres (according to EC Directive 2014/34/EU (ATEX)), zones 1, 2, and zones 21 and 22 (outside) according to EC Directive 1999/92/EC
Operating temperature up to 100 °C, with expanded metal (variant L) up to 300 °C for a limited period of time

Optional equipment and accessories

Expanded metal as an additional mechanical protection for the sound absorbing material
Stainless steel variant A2 (1.4301), with optional perforated metal facing as an additional protection for the sound absorbing material
Other stainless steel and aluminium variants as well as PUR coating are upon request
Fitting accessories to join subdivided attenuator splitters

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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 features
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: 150 – 2500 mm
L: 500, 750, 1000, 1250, 1500, 1750, 2000, 2250, 2500 mm
Intermediate sizes of H and L are possible: 150 – 2500 mm in increments of 1 mm
Undivided construction: H + L 600 mm min., 4000 mm max., 100 kg max.
- Size limit for H or L: If one dimension is greater than 1500 mm, the other one must not exceed 1500 mm
Height and length subdivided in case of deviation, or a dimension 2501 – 5000 mm
- Height subdivided from H ≥ 2501 mm, otherwise length subdivided

Variants

Construction
Half of the splitter is covered by a resonating panel

F: Glass fibre fabric
L: glass fibre fabric faced with expanded metal as an additional mechanical protection for 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 as an additional mechanical protection for 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 20 mm) 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 100 °C; variant L up to 300 °C for 8h max.

Materials and surfaces

Splitter frames, centre mullion and resonating panels made of galvanised sheet steel 1.0917 or stainless steel 1.4301
Expanded metal facing made of galvanised steel 1.0917
Perforated metal facing made of stainless steel 1.4301
Absorption material is mineral wool
- To EN 13501, fire rating Class A1, non-combustible
- RAL quality mark RAL-GZ 388
- Biosoluble and hence non-hazardous to health according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU Directive 97/69/EC
- Faced with glass fibre fabric as a protection against erosion from airflow velocities of up to 20 m/s
- 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