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Centrifugal Blower
Centrifugal Fans Forward / Backward Curve Centrifugal Fans (Belt Drive)
Air Wave Single and Double Inlet Belt Driven Centrifugal Fans have Forward Curve
Wheels and have been specially designed and developed for Air
Handling Units (AHU's), Packaged Air Conditioners, Evaporative
Cooling Systems and General Purpose Industrial and Commercial
Ventilation Systems.The currently available sizes are from 9" dia. to
18" dia. in DIDW "BAT" series and SISW "SAT" series and upto
630 mm dia. in standard metric series "FBDF" (DIDW, square outlet)
and "FBSF" (SISW) with capacities upto 18000 CFM and static
pressure upto 60 mm of water.
Salient Technical Features
The Hallmark of Air-Wave Fan is Precision. This has been achieved
using die-formed sheet metal components be it the impeller, housing
baffle, bearing support brackets etc.. The advantages are light
weight, compact design, low-noise vibration-free operation, higher
operational speeds, low motor power and lower costs.
The BLOWER WHEEL is made from high quality rust resistant galvanized
sheet steel and has forward curved blades. A large forged steel
or die cast aluminium hub with a precisely machined bore and a
keyway is fitted to the wheel backplate. Use of precision
tooling for the punching and assembling of wheel components results
in extremely low levels of eccentricity and run out. The wheel is
statically and dynamically balanced to balance quality grade G 6.3
of ISO 1940 standard.
The FAN HOUSING is also made from high quality rust resistant
galvanized sheet steel with the housing wrapper fixed to the
side plates using Pittsburg Lock. This method of locking is
superior to spot welding as it is leak proof and provides better
rigidity. Side plate profiles are cut on CNC machines which results in
proper centering of the Impeller-Shaft assembly and precise overall
fan dimension. Aerodynamically shaped inlet venturies form an
integral part of the side plates.
The FAN SHAFT is manufactured from high quality EN9 carbon steel
with keyways at both ends (for pulleys) and at the centre (for wheel
hub) and is ground to close tolerance for precision fit.
The WHEEL- SHAFT ASSEMBLY is supported at both ends in imported
pre-greased permanently sealed ball bearings with an eccentric
locking collar. Each bearing sits inside a moulded rubber
housing which in turn is mounted on to the Fan Housing using a
set of 4 specially designed die-formed sheet steel brackets on
each side. After assembly, the shaft is coated with a fine layer
of anti-corrosion laquor.
RECTANGULAR SIDE FRAMES made from G.I. sheets are bolted to the
Fan Housing. This improves Fan rigidity and strength and allows
mounting of the fan in various orientations.
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