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CAH

CIRCULAR SILENCERS FOR THE REDUCTION OF NOISE IN CIRCULAR DUCTS OF VENTILATION AND AIR CONDITIONING SYSTEMS

Circular silencer made of galvanised sheet steel or stainless steel

  • Attenuation effect due to absorption

  • The sound absorbing material is non-combustible mineral wool and non-hazardous to health according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC

  • Acoustic data measured to ISO 7235

  • Leakage class C or D (depending on size) 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

 

Optional equipment and accessories



  • Spigot with lip seal, for circular connecting ducts to EN 1506 or EN 13180


  • Socket-type spigot suitable for circular ducts to EN 1506 or EN 13180

General information

Application

  • Circular silencer for the reduction of noise
  • For the reduction of air-regenerated noise of air terminal units LVC, TVR, TVE and of mechanical self-powered controllers RN and VFC


  • For the reduction of fan noise




  • Can be used as cross talk silencer to reduce the transfer of noise through ducts between neighbouring rooms



Special characteristics

  • Insertion loss measured according to ISO 7235




  • The sound absorbing material is non-combustible




  • Insulation thickness 25, 50 or 100 mm


  • Leakage class D for nominal sizes up to and including 400 mm
  • Leakage class C from nominal size 450 mm


Nominal sizes

  • ØD: 80, 100, 125, 160, 200, 250, 315, 400, 450, 500, 560, 630, 710, 800 mm
  • L: 500, 1000, 1500 mm

For VAV terminal units and CAV controllers

  • ØD: 100, 125, 160, 200, 250, 315, 400 mm


Variants

  • 025: Circular silencer with 25 mm insulation




  • 050: Circular silencer with 50 mm insulation


  • 100: Circular silencer with 100 mm insulation


Construction



Circular silencer

  • No entry: galvanised steel 1.0917
  • A2: Stainless steel 1.4301

Type of connection:

  • No entry: spigot with groove on both ends
  • D2: Spigot with lip seal on both ends
  • AS: Spigot with lip seal and socket-type spigot on one end



Parts and characteristics

  • Circular casing
  • Perforated inner duct
  • Absorption material



Construction features

  • Circular casing
    • Outer duct: spiral duct, galvanised steel 1.0917
    • Outer duct: plain duct, stainless steel 1.4301




  • Spigot suitable for circular ducts to EN 1506 or EN 13180
  • Lip seals up to nominal size 800
  • Max. operating pressure 2000 Pa
  • Max. airflow velocity 20 m/s
  • Max. operating temperature 90 °C



Material and surfaces

  • Outer duct and perforated inner duct are spiral ducts made of galvanised steel 1.0917
  • Plain outer duct made of stainless steel 1.4301
  • Perforated inner duct made of galvanised steel or stainless steel 1.4301
  • Spigot made of galvanised steel 1.0917 or stainless steel 1.4301



  • Absorption material is mineral wool

    • To EN 13501-1, fire rating class A1, non-combustible

    • Non-hazardous to health according to the German TRGS 905 (Technical Rules for Hazardous Substances) and EU directive 97/69/EC  

    • Inner duct with non-woven fibre (fleece) 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


Informaţii tehnice

  • Technical data
  • SPECIFICATION TEXT
  • ORDER CODE

Nominal sizes80 – 800 mm
Operating pressure2000 Pa max.
Operating temperature90 °C max.

Descărcări fişiere

informaţii produs

certificate

manuale de operare

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Departamentul nostru de Cereri Service o să vă contacteze în cel mai scurt timp Pentru întrebări generale privind produsele sau serviciile puteţi suna şi la:
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