NL
June 23, 2022
XS
June 24, 2022

MS

SPLITTER SOUND ATTENUATOR WITH HIGH INSERTION LOSS, EVEN IN THE LOW-FREQUENCY RANGE

Splitter sound attenuator, basically a duct section with integral splitters (type MK) with resonating panels, for ventilation and air conditioning systems

  • Attenuation effect due to absorption and resonance
  • Energy efficient due to aerodynamically formed frame (bullnose radius 20 mm)
  • 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
  • Leakage class C and pressure class 2 according to EN 15727
  • 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
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Description

General Information

Application

  • Splitter sound attenuators used for the reduction of fan noise 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
  • 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
  • Leakage class C and pressure class 2 according to EN 15727
  • 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

  • Width B: 200, 400, 600, 800, 1000, 1200, 1400, 1600, 1800, 2000, 2200, 2400 mm
    • Intermediate sizes: in increments of 1 mm
      • Splitter thickness 100 mm: 150 – 2399 mm
      • Splitter thickness 200 mm: 250 – 2399 mm
      • Splitter thickness 230 mm: 288 – 2399 mm
    • Sizes from 2401 – 4800 mm are available with the width subdivided in increments of 1 mm
      • Even no. of splitters: centre division
      • Odd no. of splitters: off-centre division
    • Height H: 300, 400, 500, 600, 700, 800, 900, 1000, 1100, 1200, 1300, 1400, 1500, 1600, 1700, 1800 mm
      • Intermediate sizes 150 – 1799 mm in increments of 1 mm
      • Sizes from 1801 – 3600 mm are available with the height subdivided in increments of 1 mm
        • Centre division
      • Length L: 500, 750, 1000, 1250, 1500 mm
        • Intermediate sizes 501 – 1499 mm in increments of 1 mm
      • Sizes from 1501 – 3000 mm are available with the length subdivided in increments of 1 mm
        • Part L1: 1000, 1250, 1500 mm
        • Part L2: at least 501 mm and ≤ L1, in increments of 1 mm
      • Width and/or height subdivided if B + H > 4200 mm
      • Airway width S
        • Minimum: splitter thickness T × 0.25, but not < 40 mm
        • Maximum: splitter thickness T × 2

Variants

  • MS with splitter type MK
    • Splitter thickness 100 mm
    • Splitter thickness 200 mm
    • Splitter thickness 230 mm

Construction

  • Duct
    • No entry: with duct
    • OL: without duct (set of MK splitters only)
  • Splitter surface
    • F: Glass fibre fabric
    • L: glass fibre fabric faced with expanded metal as an additional mechanical protection for the sound absorbing material
      • Stainless steel construction with perforated metal facing
  • Materials and surfaces
    • No entry: galvanised steel 1.0917
    • A2: stainless steel 1.4301
    • P1: splitters powder-coated RAL 7001, silver grey
  • Duct connection
    • P: flange 30 mm, galvanised or stainless steel
    • W: angle section frame 35 × 35 × 3 mm, galvanised
    • T: flange 20 mm, galvanised
  • Matching frame
    • No entry: none
    • G: matching frame (only for angle section frame W)

Parts and characteristics

  • Duct
    • Leakage class C and pressure class 2 according to EN 15727
    • Various duct connections available
  • Matching frame
    • Angle section frame with the same pattern as the requested sound attenuator
    • For installation onto a duct (duct by others)
    • Aerodynamically formed frame
      • Covers the edges of the sound absorbing material
      • Reduces the pressure loss
      • Helps to optimise the airflow, hence reducing the air-regenerated noise
      • Increased rigidity due to special profile
    • Absorption material
    • Resonating panel

Construction features

  • Bent duct with grooves for increased rigidity
  • Sound attenuators with angle section frame, width or height subdivided
    • Galvanised construction only
  • 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 for increased rigidity
  • Operating temperature up to 100 °C; variant L up to 300 °C for 8h max.

Materials and surfaces

  • Duct, flange in galvanised sheet steel 1.0917 or stainless steel 1.4301
  • Angle section frame in galvanised L steel S235JRC2
  • Splitter frame, 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 hygienically safe 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
  • Leakage class and pressure class according to EN 15727

Maintenance

  • Low-maintenance as construction and materials are not subject to wear
  • Regular cleaning intervals according to VDI6022

 

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