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Forward Curve Centrifugal Fans
( Belt Driven )
Blowtech Single & 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 “FBD” (DIDW, square outlet) and “FBS” (SISW) with capacities
upto 15000 CFM and static pressure upto 60 mm of water. These
world class fans are manufactured in our Noida plant and are
available ex-stock.
Salient Technical Features:
The Hallmark of Blowtech 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.
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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.
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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.
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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.
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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.
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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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SERIES "BAT"
| Type : |
Double Inlet Double
Width |
| Size range : |
9"x7"
onwards and upto 18"x18" |
| Volume flow : |
Upto 8000 cfm |
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SERIES "FBD"
| Type : |
Double Inlet Double
Width |
| Sizes : |
315 mm to 630 mm |
| Volume flow : |
Upto 15000 cfm |
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SERIES "BAT-T2"
| Type : |
Twin Fans on a
single shaft |
| Sizes : |
9"x7"
to 18"x18" |
| Volume flow : |
Upto 16000 cfm |
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SERIES "FBS"
| Type : |
Single Inlet Single
Width |
| Sizes : |
315 mm to 630 mm |
| Volume flow : |
Upto 8000 cfm |
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SERIES "SAT"
| Type : |
Single Inlet Single
Width |
| Sizes : |
9"x3.5"
to 18"x9" |
| Volume flow : |
Upto 4000 cfm |
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Forward Curved Centrifugal Fans
(DIDW,Direct Driven)
Technical Features
Housing:- Made from high quality rust
resistant G.I sheets with aerodynamically shaped inlets forming
an integral part of the housing.
Impeller:- Made from Aluminium sheets
with a die-cast aluminium hub. Each impeller is dynamically balanced
to balanced quality grade G 6.3 of ISO 1940
Motor:- Single phase, 230 Volts, 50
Hz, Capacitor start motor.
Mounting:- The impeller is mounted
directly on the motor shaft and the impeller-motor assembly is supported
in the housing by specially designed brackets with anti-vibration
mountings.
Presently
available sizes are 9"x7", 9"x9",
10"x8" and 10"x10".
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