of regenerative blowers, positive displacement blowers, Acme fans,
Delhi fans, fiberglass fans / FRP blowers, Plastec Propylene fan
ventilators, American Coolair ILG ventilators & fans, Grainger
ventilators, explosion proof blowers, power roof ventilators,
replacement fan bldes / blower wheels.Manufacturer
of heavy-duty industrial fans, blowers, fan dampers and exhaust
ventilating pressure blowers. Fans include: air foil ventilators,
radial pressure blowers, forced draft fans, axial flow ventilators,
backward curve blowers, forward curve fans, paddle wheel and radial
blowers. Manufacturer of high pressure blowers for industrial proCanada Blower
combustion, blow off
cooling, air drying, blowing fans and exhausting ventilators, conveying
and agitating vacuum suction blowers. Industrial blower dampers for air
dilution systems. Fan, blower and ventilator repair and rebuild.
Industry areas such as
chemical, pharmaceutical, and various industrial processes have
explosive environments that require the equipment to be specially
constructed to minimize the risk of gas or dust ignition. Fans are one
of the items of industrial equipment that have potential to ignite
either gas or dust from either sparks caused by contact of the fan
wheel and housing, or because of fan motors with high temperatures,
inadequate gas/dust ingress protection, or inadequate construction for
prevent spark or flame propagation in to the surrounding atmosphere.
The likelihood of sparks with the fan housing is minimized through use
of special types of spark resistant construction, depending on the type
of protection required.
AMCA “A” spark resistant construction: Highest degree of spark
resistance. Airstream parts are constructed out of non-ferrous
materials. Typically, aluminum is the non-ferrous material used, but
for certain applications, such as high temp, where aluminum cannot be
used, Twin City Fan has the capability to use alternative materials
including Monel®, Inconel®, and Hastelloy®.
AMCA “B” spark resistant construction: Less protection that AMCA “A”
construction, AMCA “B” construction consists of a non-ferrous wheel and
non -ferrous rubbing plate around the hole through which the shaft
passes. As with AMCA “A” construction, aluminum in usually the
non-ferrous material of choice but can be substituted with the
alternative materials listed for AMCA “A” construction.
AMCA “C” spark resistant construction: Lowest degree of spark
resistance. Utilizes only a non-ferrous rubbing plate that is typically
constructed of aluminum but can be constructed out of the
aforementioned alternative materials when appropriate.
In addition to spark resistant construction, motor construction
appropriate to the explosive environment must also be considered. UL
explosion standards classify explosive environments according to Class,
Group, and Division. The class indicates whether 1. Gases, vapors,
liquids are present, 2. Dusts are present, 3. Or Fibers and flyings.
The Group specifies what types of vapors, dusts, fibers, etc. are
present. The Division specifies the frequency of the presence of the
Class, Group, and Division are specified by the client, and Buffalo
Blower works closely with our motor manufactures to determine the best
motor that conforms to those specifications. Many of our fans are
appropriate for explosion proof environments, but due to the
interdependence of many factors, each situation must be considered
Emergency smoke exhaust systems are designed to remove smoke and heat
from buildings in the event of a fire. These systems play a crucial
role in increasing occupant safety and allowing rescue personnel to
safely enter burning buildings. Buffalo Blower offers a full line of
smoke and heat fans capable of withstanding a minimum temperature of
500°F for four hours or 1,000°F for 15 minutes. Our inline
smoke and heat fans are also available in a vertical roof mount
configuration featuring a discharge cap with butterfly dampers and an
optional fusible link designed to stay open in the event of a fire.