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© FANTECH
2016
NOISE CONTROL PRODUCTS
CIRCULAR DUCT ATTENUATORS
C Series
CP Series
C1
C2
C Series
C Series
C.P Series
with Q-Seal
C.P Series
with Q-Seal
DESCRIPTION
CONSTRUCTION
O
Casing and structure made from Z275 zinc coated
galvanized steel.
O
Alternative material of construction available including
SS304, SS316 and 5000 Series Aluminium.
O
Infill from bio-soluble acoustic grade glasswool or mineral
wool.
O
C Series has a fiberglass membrane to minimize fibre
egress from the infill into the air stream.
O
Q-Seal variants have infill material fully wrapped in
PET plastic film.
PERFORMANCE DATA
Acoustic and Performance Datasheets based on Testing to
BS4718:1971 may be accessed by using the 'Fans By Fantech'
Product Selection Program.
Fantech Circular duct attenuators are designed to be directly
attached to fans or in-line with circular ductwork.
The range of circular attenuators is as follows:
C Series - Open Circular Attenuators
Ideal for most HVAC and industrial applications. Available in
fixed internal diameters with two lengths, nominally one or two
times the inner diameter of the attenuator. They produce
nominal increases in air flow pressure drop over plain duct.
This range is suitable for dry applications. Refer to the C..QS
and C.P..QS Series for applications where moisture may be
present in the air stream.
C.P Series - Podded Circular Attenuators
The C Series circular attenuator can be fitted with a full length
acoustically absorptive pod. Ideal for applications where
additional acoustic performance is required over the C Series
and higher air flow pressure loss can be accepted (see
H-10
).
C..QS and C.P..QS Series -
Circular Q-Seal Attenuators
The Circular Q-Seal attenuators include the qualities of the C
and C.P series attenuators and incorporate an infill system fully
wrapped in an impermeable plastic membrane/film. The C..QS
and C.P..QS Series are suitable in medical and clean room
applications and any sensitive ventilation systems requiring a
wrapped infill material to prevent the possibility of insulation
fibre ingress into the airstream. They are also suitable where the
insulation medium is directly exposed to weather, grease, liquid
or dusts. Attenuators of these model types may also be
cleaned periodically by low-pressure steam or pressure washer
equipment.
HOW TO ORDER
SUGGESTED SPECIFICATION
Circular attenuators shall be of the C Series as designed
and manufactured by Fantech Pty. Ltd. and shall have the
dimensions, acoustic insertion losses and pressure losses as
scheduled. Casing and end flanges shall be constructed from
forming grade zinc-coated mild steel sheet. The infill material
shall be either rockwool or fibreglass as specified by the
manufacturer. The infill material shall be covered with a
gauze scrim to prevent erosion of the fibres, then encased
in galvanised perforated sheet metal.
H-8
RANGE AVAILABLE