Type RKA

Parts kit for high insertion loss in the low-frequency range

 

Energy-saving splitters with resonating panels, ready to be used in air conditioning systems

  • Installation in combination with other attenuator splitters
  • Energy efficient due to aerodynamically profiled frame (radius > 15 mm)
  • Acoustic data measured to ISO 7235
  • Absorption material is biosoluble and hence hygienically safe
  • Absorption material faced with glass fibre fabric as a protection against erosion due to airflow velocities up to 20 m/s
  • Absorption material non-combustible, to EN 13501, fire rating class A1
  • Available in standard sizes and many intermediate sizes
  • Operating temperature up to 100 °C

Optional equipment and accessories

  • Powder-coated
  • Stainless steel
small_tab1_Serie RKA
  • Application
  • Description

Application

  • Sound attenuator splitters with resonating panels, Type RKA, used for the reduction of fan noise and air-regenerated noise in air conditioning systems
  • Installation in combination with other Type MKA or XKA splitters
  • Attenuation effect due to resonance
  • Broadband attenuation particularly in the low frequency range of critical fan noise
  • Hygiene tested and certified to VDI 6022
  • For use in potentially explosive atmospheres (ATEX), zones 1, 2, 21 and 22 (outside)

Special characteristics

  • Resonating panels ensure increased insertion loss in the frequency range of critical fan noise
  • Up to 30 % lower differential pressure
  • Energy efficient and/or space saving due to aerodynamically profiled frame
  • Hygiene tested and certified
  • Multi-section construction available for large dimensions

Variants

Maximum attenuation

  • A: 250 – 125 Hz
  • B: 125 – 250 Hz
  • C: 125 – 63 Hz
  • D: 63 – 125 Hz

Parts and characteristics

  • Aerodynamically profiled frame
  • Absorption material and resonating panels fitted to reduce air-regenerated noise by resonance

Useful additions

  • Fitting accessories for sound attenuator splitters

Construction features

  • Aerodynamically profiled splitter frame (radius > 15 mm) that enables a reduction of turbulence both upstream and downstream; frame with grooves for increased rigidity
  • Frame edges are folded to protect the infill
  • Operating temperature up to 100 °C (construction with perforated sheet metal up to 300 °C for 3h max.)

Materials and surfaces

  • Splitter frames and resonating panels made of galvanised sheet steel
  • Absorption material is mineral wool


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/EG
  • Faced with glass fibre fabric as protection against erosion through airflow velocities of up to 20 m/s
  • Inert to fungal and bacterial growth

Technical information

  • Function
  • Technical data
  • Quick sizing
  • Specification text
  • Order code
rka

Functional description

The attenuation effect of the RKA splitters is due to resonance.

The splitter surface that runs parallel to the airflow is covered with resonating panels. These panels start oscillating due to the sound (resonance) and hence absorb sound energy. Resonance works best in the frequency range of critical fan noise. The splitters have a mineral wool infill that prevents an amplification of the sound.

rka
rka

 

Sound attenuator splitters used for the reduction of fan noise and air-regenerated noise in air conditioning systems. Attenuation effect due to resonance. To be used in combination with sound absorbing splitters. Energy-saving as well as hygiene tested and certified.

Installation kit consists of an aerodynamically profiled frame (radius > 15 mm), absorption material and resonating panels.

Frame edges are folded to protect the sound absorbing infill.

Insertion loss and sound power level of the air-regenerated noise tested to ISO 7235.

Meets the hygiene requirements of VDI 6022, DIN 1946, parts 2 and 4, as well as of VDI 3803.

Special characteristics

  • Resonating panels ensure increased insertion loss in the frequency range of critical fan noise
  • Up to 30 % lower differential pressure
  • Energy efficient and/or space saving due to aerodynamically profiled frame
  • Hygiene tested and certified
  • Multi-section construction available for large dimensions

Materials and surfaces

  • Splitter frames and resonating panels made of galvanised sheet steel
  • Absorption material is mineral wool


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/EG
  • Faced with glass fibre fabric as protection against erosion through airflow velocities of up to 20 m/s
  • Inert to fungal and bacterial growth

Technical data

  • Splitter thickness: 200 mm
  • Nominal sizes: 140 × 500 mm – 1800 × 1500 mm
  • Operating temperature: – 100 °C
rka

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Contact

Thank you for your message!

Visual contact Visual contact

Your message is send and will be processed shortly.
Our department for Service-Requests will contact you asap.
For general question regarding products or services you can also call:
Tel.: +49 (0)2845 / 202-0 | Fax: +49 (0)2845/202-265