Products   Attenuators By Types   Circular Attenuators
Q-Seal Podded
C1 - Circular 1D Open Type Attenuators
otc
Features
The 'C1' circular attenuators units are one diameter long. They are generally mounted directly to or close to an axial flow fan.

ModelDiameterExternal
Diameter
LengthdB(A)
Reduction
C1-0313154813008
C1-0353505213008
C1-0404005666008
C1-0454506166008
C1-0505006666008
C1-0565607306009
C1-0636308006009
C1-0717108809009
C1-0808009709009
C1-090900107011509
C1-1001000122011508
C1-1251250147011508
C1-1401400162011508
C1-1601600182018008
C1-1801800202018007
C1-2002000222018007
C2 - Circular 2D Open Type Attenuators
otc
Features
The 'C2' circular attenuators units are nominally two diameters long. They are generally mounted directly to or close to an axial flow fan.

ModelDiameterExternal
Diameter
LengthdB(A)
Reduction
C2-03131548160013
C2-03535052160013
C2-04040056690013
C2-04545061690014
C2-050500666115013
C2-056560730115014
C2-063630800115014
C2-071710880150014
C2-080800970150014
C2-0909001070180013
C2-10010001220180013
C2-12512501470240013
C2-14014001620240013
C2-16016001820360012
C2-18018002020360012
C2-20020002220360012
C1P - Circular 1D Pod Type Attenuators
ptc
Features
The 'C1P' circular attenuators are one diameter long with a central pod. They are generally mounted directly on or close to an axial flow fan.

ModelDiameterExternal
Diameter
LengthdB(A)
Reduction
C1P-03131548130012
C1P-03535052130013
C1P-04040056660013
C1P-04545061660013
C1P-05050066660013
C1P-05656073060013
C1P-06363080060013
C1P-07171088090014
C1P-08080097090013
C1P-0909001070115013
C1P-10010001220115013
C1P-12512501470115013
C1P-14014001620115013
C1P-16016001820180012
C1P-18018002020180012
C1P-20020002220180012
C2P - Circular 2D Pod Type Attenuators
ptc
Features
The 'C2P' circular attenuators units are nominally two diameters long. They are generally mounted directly to or close to an axial flow fan.

ModelDiameterExternal
Diameter
LengthdB(A)
Reduction
C2P-03131548160017
C2P-03535052160017
C2P-04040056690017
C2P-04545061690017
C2P-050500666115018
C2P-056560730115018
C2P-063630800115019
C2P-071710880150019
C2P-080800970150019
C2P-0909001070180019
C2P-10010001220180019
C2P-12512501470240019
C2P-14014001620240020
C2P-16016001820360020
C2P-18018002020360020
C2P-20020002220360020
C1..QS - Q-Seal Circular 1D Open Type
otc
Features
The 'C1..QS' (Q-seal) circular attenuators are one diameter long. They have an impervious seal between the acoustic fill and ambient air. They are used in critical applications where the possibility of fibre contamination of the acoustic fill is not allowed. There is a penalty on the acoustic performance in exchange for the certainty that fibre fly is eliminated. Typical applications are as follows: -
  • clean rooms
  • operating theatres
  • wet environments where attenuators are exposed to the elements
  • kitchen exhaust systems
  • applications where workers are sensitive to fibre exposure


ModelDiameterExternal
Diameter
LengthdB(A)
Reduction
C1-031QS3154813006
C1-035QS3505213006
C1-040QS4005666006
C1-045QS4506166006
C1-050QS5006666006
C1-056QS5607306006
C1-063QS6308006006
C1-071QS7108809006
C1-080QS8009709006
C1-090QS900107011506
C1-100QS1000122011506
C1-125QS1250147011506
C1-140QS1400162011506
C1-160QS1600182018006
C1-180QS1800202018005
C1-200QS2000222018005
C2..QS - Q-Seal Circular 2D Open Type
otc
Features
The 'C2..QS' (Q-Seal) circular attenuators are nominally two diameters long. They have an impervious seal between the acoustic fill and ambient air. They are used in critical applications where the possibility of fibre contamination of the acoustic fill is not allowed. There is a penalty on the acoustic performance in exchange for the certainty that fibre fly is eliminated. Typical applications are as follows: -
  • clean rooms
  • operating theatres
  • wet environments where attenuators are exposed to the elements
  • kitchen exhaust systems
  • applications where workers are sensitive to fibre exposure


ModelDiameterExternal
Diameter
LengthdB(A)
Reduction
C2-031QS31548160011
C2-035QS35052160011
C2-040QS40056690011
C2-045QS45061690011
C2-050QS500666115011
C2-056QS560730115011
C2-063QS630800115012
C2-071QS710880150012
C2-080QS800970150012
C2-090QS9001070180011
C2-100QS10001220180011
C2-125QS12501470240011
C2-140QS14001620240010
C2-160QS16001820360010
C2-180QS1800202036009
C2-200QS2000222036009
C1P..QS - Q-Seal Circular 1D Pod Type Attenuators
ptc
Features
The 'C1P..QS' (Q-Seal) circular attenuators are one diameter long with a central pod. They have an impervious seal between the acoustic fill and ambient air. They are used in critical applications where the possibility of fibre contamination of the acoustic fill is not allowed. There is a penalty on the acoustic performance in exchange for the certainty that fibre fly is eliminated. Typical applications are as follows: -
  • clean rooms
  • operating theatres
  • wet environments where attenuators are exposed to the elements
  • kitchen exhaust systems
  • applications where workers are sensitive to fibre exposure


ModelDiameterExternal
Diameter
LengthdB(A)
Reduction
C1P-031QS31548130011
C1P-035QS35052130011
C1P-040QS40056660011
C1P-045QS45061660011
C1P-050QS50066660011
C1P-056QS56073060011
C1P-063QS63080060011
C1P-071QS71088090011
C1P-080QS80097090011
C1P-090QS9001070115011
C1P-100QS10001220115011
C1P-125QS12501470115011
C1P-140QS14001620115010
C1P-160QS16001820180010
C1P-180QS18002020180010
C1P-200QS20002220180010
C2P..QS - Q-Seal Circular 2D Pod Type Attenuators
ptc
Features
The 'C2P..QS' (Q-Seal) circular attenuators are nominally two diameters long with a central pod. They have an impervious seal between the acoustic fill and ambient air. They are used in critical applications where the possibility of fibre contamination of the acoustic fill is not allowed. There is a penalty on the acoustic performance in exchange for the certainty that fibre fly is eliminated. Typical applications are as follows: -
  • clean rooms
  • operating theatres
  • wet environments where attenuators are exposed to the elements
  • kitchen exhaust systems
  • applications where workers are sensitive to fibre exposure


ModelDiameterExternal
Diameter
LengthdB(A)
Reduction
C2P-031QS31548160015
C2P-035QS35052160015
C2P-040QS40056690015
C2P-045QS45061690015
C2P-050QS500666115016
C2P-056QS560730115016
C2P-063QS630800115017
C2P-071QS710880150017
C2P-080QS800970150017
C2P-090QS9001070180016
C2P-100QS10001220180017
C2P-125QS12501470240016
C2P-140QS14001620240016
C2P-160QS16001820360017
C2P-180QS18002020360017
C2P-200QS20002220360017
CC - CC Series Circular Attenuators
cc
Features
The 'CC' circular attenuators have a high performance and are of an ultra-light construction. They may be mounted directly to the fan, before the outlet grille or anywhere in the system where their application will reduce the ambient noise level.

ModelDiameterExternal
Diameter
LengthdB(A)
Reduction
CC015M15026550016
CC020H200320100015
CC020M20032050013
CC025H250365100013
CC025M25036550010
CC030H300415150014
CC030M300415100011
CC031H315415150014
CC031M315415100011