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.
Distributor of industrial high
pressure fans and general venilation blowers. Sales of high temperature
fans, process pressure blowers, regenerative pressure blowers;
industrial; process and commercial heating; ventilating and
Ventilating Fan Co. makes a PT Power Tube Make-Up Air System a sone of
the most economical options for larger industrial plants ventilation
air make up.
When exhaust fans are used to provide ventilation, both for industrial
and process exhaust and personnel comfort, a negative air pressure is
created within the building. This negative pressure causes several
- Process exhaust systems are less efficient and may not work properly.
- Down flow can occur through gravity vents and result in the back
venting of products of combustionfrom flues and stacks of heaters and
- Drafts are created that are a dsicomfort to employees. Safe operating
of outside doors may even be impaired.
Our Power Tube Fan Make-Up Air System solves all of these problems
economically, even on the coldest winter day.
In the winter, conventional make-up air systems have to heat the cold
outside air prior to introduction into the building. This is an
expensive process in both equipment and continuing energy cost. The
Power Tube Fan Make-Up Air System is a simplier system that utilizes
wasted building heat and basic aerodynamic principles for supplying,
tempering and distributing make-up air. And that makes it less
expensive than conventional make-up air systems to purchase, to install
and to operate.
PT Power Tube Fan Make-Up Air System uses a special propeller fan with
straightening vanes and fan housing mounted to an opening in a building
sidewall near the ceiling (an optional roof mounting model is
available). A motor operated wall shutter is attached to the outside
wall opening under a protective weather hood. A long specially
constructed reinforced polyethylene tube is connected to the fan
discharge orifice to carry fresh outside air throughout the building
and temper it by mixing cold outside air with warm inside air near the
plant ceiling before it reaches floor level.
Specially sized and spaced discharge holes in the polyethylene tube
produce relatively high velocity turbulent jets of air. This turbulent
jet flow swirls and mixes surrounding air particles resulting in the
entrinment of the warm ceiling air and the complete tempering of very
cold outside air within a relatively short distance. The result is
heated make-up air at the price of unheated make-up air.
Power Tube Make-Up Air Fans are available in Sizes 18 to 48 for for air
flows up to 40,000 CFM.
PT Power Tube Make-Up Air System tube is constructed of thick woven
high density polyethylene fiber(8 x 8) laminated with poly coating to a
thickness of 6 Mils. It is 3.8 oz. per square yeard material. Burst
strength is 118 Lbs per square inch. The material is flame retardant
and complied with NFPA Standard 701. Tubes are available in two colors:
blue and white. One end of the polyethylen tube is factory dealed.
Sufficient make-up air should be provided to balance exhaust from
general ventilation and process ventilation. Usually several Power Tube
Fans will be required, located to distribute air throughout the plant.
If additional tempering of make-up air in specific plant areas becomes
necessary, unit heaters can be added.