
Canada Blower Co. has
developed Low Profile Positive Pressure Ventilators that have been
designed to fit in tight compartments and small spaces without
sacrificing performance or features. These compact ventilation blowers
are available is both gasoline driven configuration and with 115/230V
single phase electric motor:
Canada Blower Positive Pressure Blower is a high volume fan use to
pressurize a burning structure, in case of fire, in order to force the
smoke out. Canada Blower Positive Pressure Blowers are portable,
gasoline powered fans, most of which utilize a 5.5 horsepower engine.
The theory of positive pressure ventilation is based on the principal
of even pressure distribution. Once a structure is pressurized, air and
smoke can be forced out through any opening (similar to escaping from
an inflated balloon).
Canada Blower electric smoke ejectors (negative pressure ventilation)
can be used for smoke removal but this has proven to be inferior to
positive pressure ventilation:
What makes Canada Blower Positive Pressure Ventilation superior to
negative pressure ?
* The risk of injury from the engaged structure is reduced while
placing the fan in operation.
* Positive pressure ventilation is faster to set up and requires fewer
personnel.
* The Positive Pressure Blower has a self contained power source, while
electric fans require cords and adaptors.
* Smoke and heat is removed from all levels of the structure unlike
negative pressure which can result in localized extraction.
* Quicker results. After initial knockdown, positive pressure
ventilation can be initiated and will show immediate improvements in
the interior conditions.
* It allows replacement of contaminants with vital cooler, cleaner air
- especially in sealed or windowless buildings. It's also very
effective in large and compartmentalized buildings, warehouses,
schools, etc.
* Quick results allow firefighters faster entry due to lower heat
levels and improved visibility.
The following criteria should be considered for effective use of
Positive Ventilation:
- The cone of air must cover the intake opening.
The fan must be placed the correct distance from the structure such as
that the cone of air forms a seal around the opening.
- The size and location of the discharge is important.
The blower discharge, if at all possible should be as high and far away
from the intake as is practical. The discharge size should be between
3/4 to 1/2 times the intake. This may not always be possible as the
fire may have already dictated discharge locations and sizes; but
whenever there is a choice, the above criteria should be used.
- It is important to control the air flow between the intake and
discharge.
Positive pressure ventilation can move air long distances if proper
control is maintained by opening and closing doors, windows, etc. It is
important that firefighters understand not to open the structure too
much: ie breaking windows, etc.
The standard features of Canada Blower Positive Pressure Ventilators
include: fold down "T" handle; 8" pneumatic tires with full width axle;
a "tilt and lock" device that allows the unit to be angled 20 degrees
up or down with infinite positions in between; sturdy and light 1 inch
wrap around frame. Explosion proof electric motors are available as
drivers too.
The optimum Canada Blower ventilator placement distance on most 6' 6"
doors is about five to six feet away. If placement is too close, the
seal won't be achieved. If placement is too far away, the cone of air
will be hitting well outside the opening.
Backward
curved fan blowers in New York City and
Chicago, aerofoil / acoustafoil, or aerocline fan blowers with high
temperature
construction, stainless steel SS316, SS316L, SS304, aluminum, explosion
proof -
spark resistant construction, monel construction. Supply of replacement
backward
curved (BC) fan blowers and airfoil (AF), or acoustafoil (AcF), or
Aerocline
fan blower parts for backward curved bc fan blowers manufactured by
Buffalo
Blower - New York, Twin City Fan, Northern Blower, Chicago Blower,
Sheldons,
Cincinnati Fan, Hartzell, IAP, Industrial air products, Canadian
blower,
Aerovent, Penn Ventilation, Penn-Barry, Barry Blower, ACME, Aerovent,
Alphair,
American Fan, Lau Industries, Clarage, Delhi, Canarm, Leader Fan,
Daltec, ABB,
Flakt, Flaktwoods, Woods, MK Plastics, Robinson Industrial, Garden City
Fan,
Loren Cook, Jen-air, Jenn Fan, Aeroflo, Grainger, Greenheck, Kice Fan,
ILG
Industries, Canada Fan, Industrial Air, Ceilcote
Widely recognized for design efficiency and integrity, Canada Blower
airfoil wheel has ideal characteristics for variable air volume
systems. The fan's deep spun inlet and hyperbolic wheel cone plus
generous fan housing proportions provide a smooth stable air flow over
the entire performance range. Precision balancing assures quieter
vibration-free operation that adds to the overall reliability and
performance of Canada Blower's airfoil fans.
Canada Blower upblast power roof ventilators are designed to discharge
vertically so that air velocity seals the opening against rain and snow
while the unit is in operation. Whe fan is switched off,
counterbalanced dampers close by gravity to provide a weather-resistant
closure.
These roof exhausters are available in wide range of sizes and
capacities: with blade diameters from 18" to 84" and capacities ranging
from 1000 CFM to appr. 100,000 CFM. Fans of this type are quite
efficient, dependable and require relatively little maintenance.
The Canada Blower JBH PRVs utilize a cross-frame to support unique
bearings and fan shaft assembly. This stationary shaft mounts on the
cross-frame member and power is applied directly to the prop hub in the
same plane as the bearings. This reduces bearing load and substantially
increases the fan bearing life. Bearings are permanently lubricated and
sealed and have an L-10 life exceeding 300,000 hours. All roof exhaust
fans are available with such accessories a motor-out-of-airstream kits,
roof curbs, protective coatings, safety guards, spark-resistant and
explosion proof ventilator constructions, and many other useful
features.
Tubeaxial Fans (industrial
tubeaxial blower fans)
Axial flow fans or industrial
axial fans use a propeller to draw the air into the fan then discharge
it in the same axial direction which makes them beneficial for small
space constraints. The way these fans work is like the propeller on an
airplane: the fan blades generate an aerodynamic lift that pressurizes
the air. Axial fans are typically selected where large volumes of clean
air need to be moved against low static pressures. There are optional
designs where vanes are added to the standard housing configuration to
allow the propeller to generate greater static pressure. They can be
used in varying environments as their construction is of painted carbon
steel, stainless steel, aluminum or FRP (fiber-reinforced polymer).
Tubeaxial fan:
axial flow through fan designed for low pressure building ventilation
and industrial process application. Uses include heat, smoke, and fume
removal; process ventilation and process air handling; proces drying
with ambient or preheated up to 650 F air; comfort process cooling and
general ventilation of buildngs. Available in direct drive arrangements
4/4M/4V/4D/4R and corresponding belt drive arrangements 9/9M/9V/9D/9R.
Capacities: to 350,000 CFM. Static pressure to 4 inches water gauge.
Aluminum fan wheel, Steel
wheel, or
Alloy wheel:
tubeaxial fan for non-sparking x-proof applications is supplied in AMCA
A, AMCA B, or AMCA C spark resistant construction in all aluminum
welded construction, or in monel. For corrosive environment tubeaxial
fan is supplied in 304 SS, 316 SS, or 316 L stainless steel
construction. For chemical process applications tubeaxial fan is
available in fiber reinforced plastic frp construction, or in
polypropylene construction, or in plastic. For high temperature
applications up to 650 F tubeaxial fan is supplied typically in steel
welded construction.
Inlet flanges, outlet flanges,
companion flanges: continuosly welded to match ANSI class 125/150,
DIN, ISO, or custom hole pattern.
Fan shaft seals:
tubeaxial fan shafting is straightened to close tolerance to minimize
"run-out" and ensure smooth operation. Bearings are of pillow plock, or
flaged bearings. Ceramic shaft seal and lubricated shaft seals (Buna,
Teflon, Viton) are standard. Red silicone gasketing is used on high
temperature applications.
Heat fan construction up to 650
F:
includes high temperature paint, shaft cooler, shaft and bearing tunel
cooling auxiliary blower (optional), insulated shaft and bearing tunel,
steel, or alloy wheel.
Cladding for sound attenuation
and silencers:
cladding consists of 2 inches mineral-wool insulation covered with a
welded steel jacket. Acoustic cloth jackets are available as
inexpensive alternative. Inlet silencers/outlet silencers are supplied
with matching flanges.
Inlet vane damper assembly:
external inlet vane damper is provided for precise air volume control.
Standard fan accessories:
flash
/ raised access door, inspection port, drain and plug, 3-way drain,
mount feet, belt guard, motor cover, spring vibration isolation,
rubber-in-share (RIS) vibration isolation, vibrating pads, electrical
actuators, pneumatic actuators.
Roof mount fan accessories:
roof curb mount cap, roof curb, weather band, weather shroud with
integral flap damper, butterfly damper assembly, magnetic latches.
Controls and drives:
variable frequency drives (VFD), across-the-line starters, RTDs,
pressure sensors, flowmeters - complete control packages.
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Industrial blowers, OEM fans,
high temperature ventilators, high pressure blowers and high
temperature ventilator fans, industrial OEM fans, roof and wall fan
exhausters, industrial ventilating and air-conditioning fan / blower
wheels, HVAC, heating ventilation and air conditioning, process and OEM
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