The FDA series is DIDW centrifugal fan
with forward curved (FC) impellers. The fans are suitable for supply and
exhaust applications in commercial, process and industrial HVAC systems.
AMCA Air, Sound and FEG certified ranges
are from 315 to 900.
The operating limit of the FDA series is
set according to the requirement of Class 1, 11 and 111 limit as defined in AMCA
Standard 99-2408-69. The FDA seri4s is available in type S, C, T or X.
FDA series is also available in twin fan
version with two double inlet fans mounted on the same shaft.
FC fans are operated at relatively low
speeds and are used to deliver large air volumes against relatively low static
pressures. The inherently light construction of the forward curved wheel does
not permit it to be operated at speeds needed to generate high static pressure.
The typical application range of this
type of fan is from 30 to 80% wide open airflow. Selecting an operating point
below approximately 30% wide open may place the fan in an area of instability.
Similarly, an operating point beyond 80% wide open typically produces noise and
inefficiency.
The maximum static efficiency is from
approximately 50 to 65% and occurs just to the right of the maximum
static-pressure point on the fan performance curve.
Quick Facts
• Size from 160 to 1400 mm
• Capacities to 300,000 m3/h
• Total pressure up to 2400
Pa
• Suitable for use in AHU,
packaged unit and ventilation
Application
For supply or exhaust application
in commercial, institutions and industrial HVAC systems.
Testing
Both air and sound
performance ratings are based on test to AMCA210-85 and AMCA300-95 Standards.
All wheels are statically
and dynamically balanced to ISO1940 and AMCA204 - G2.5 Standards.
Casing Drain
This option is available when fans are exposed to the atmosphere or
operating in high humidity condition.
Outlet Flanges
Outlet flanges are available upon request.
Inspection Doors
The inspection door is supplied in one of the three positions (P3, P4,
P5). Please refer to FDA product catalogue, page 4 for the exact location.
Guards
Inlet guards, discharge guards and non-drive end shaft guards are
available on request.
Wheel
The wheel of FDA is made of galvanized sheet steel forward curved
blades.
Housing
Except for 1250 and above, the housing is manufactured in galvanised
sheet steel with the housing fixed to the side plates in "pittsburgh
lock" form system.
Housings for 1250 and 1400 are manufactured in mild steel finished with
polyester powder coating finish.
Frame
The frame is manufactured with galvanized angular bars for type "C".
For type "T" and "X", it's manufactured with sections of
steel with polyester powder coating finish.
Shaft
Shafts are manufactured from C45 carbon steel. All shafts are coated
with an anti-corrosion varnish after assembly.
Bearings
Bearings used are either deep groove ball bearing type with an eccentric
locking collar or an adaptor sleeve or spherical roller bearings type sealed at
both sides for different duty application as defined in FDA Product Catalogue
page 4.
