Sales of high pressure industrial blowers, OEM fan ventilators, axial flow wall fans and roof supply / exhaust ventilators, centrifugal fan blowers, scroll cage blower fans, industrial vacuum pressure blowers, stainless steel SST fans, fibeglass FRP ventilators, aluminum pressure blowers.

Products
Supply of replacement industrial fans and industrial blowers, and parts for industrial fans, and industrial blowers, manufactured by Buffalo Blower / New York, Twin City Fan, Northern Blower fans.

BARRIE FAN

Industrial Dampers

Manufacturer Sales Office for Industrial Dampers and Variable Inlet Vane Fan Dampers. Our product range also cinclude Industrial Blowers, heavy duty Fans and Commercial Ventilators.

Variable Vane Damper
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Variable Vanes Dampers



Variable Vane Fan Dampers
is a very energyefficient way to control fan performance. These dampers provie accurate modulation as well as power savings at reduced fan air flow rates. The advanced design of these vane dampers as well as their location at the inlet of the fan also provide for smooth fan start up, as well as superior pressure control during operations.


Manufacturer of I.D. blowers, F.D. blowers, force draft fans, force draft blowers, blow off ventilators / fans, PVC FRP SST ventilators, squirrel cage blower fans, high pressure centrifugal ventilators, Chicago blowers, aluminum fans, stainless steel ventilators, hot air blowers, heating fans, high temperature oven ventilators, high pressure air blowers, squirrel cage blower wheels, Peerless Dayton ventilators, Sheldons blowers, New York fans NYB, TCF, Delhi fans blowers.

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Barrie Fan
Hamilton, ON

Call Us: 1-888-763-1800

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In the axial flow ventilator the air must blow in line with the axis of rotation and there must be blades with space between them. With few exceptions, the axial blower or fan must not have a lot of back pressure and will work a lot better if the blade is shrouded. One obvious exception is the turbine compressor used in jet engines, but this requires very tight fittings and very high speed so the air is being rammed in against the outgoing air much faster than it can move - it uses a lot of power and makes a lot of noise. Shrouding works better because the greatest loss in an unshrouded fan is the air coming off near the tips and immediately turning out and back circulating only through the fan and not through the room. The most common shrouded fan people see is muffin style fan in computers. An axial blower can have multiple sets of blades and the blades can even over lap so light is not visible through the fan. Fans are used most often for moving large quantities of air between spaces at atmospheric pressure.
 
Centrifugal blowers come in a number of forms of which the most common is the squirrel cage blower. The common factor is the air is moving perpendicular to the axis of the part that is moving the air. Typically, the air is drawn in through the side of the unit, turns at low speed to encounter the inside of a spinning cylinder with ribs or vanes around the wall of the cylinder which fling the air out and away where it is captured and aimed through an outlet much smaller than the inlet.  Think of taking an open tin can, drilling a hole in the center of the bottom to take a bolt as an axle and cutting slots up the sides, bending the material of the slots in, then spinning it with a drill. A variation looks like a plate with ribs running from the center and increasing in height toward the rim, the air being thrown off the rim. The name squirrel cage comes from the appearance like the tread wheel small rodents use for exercise - I suspect it is not called a hamster tread wheel because that is too precise - or childish. Blowers can have higher output pressures, but not a lot higher and they lose capacity rapidly with increasing pressure.

Aside from the small squirrel cage blowers used on some electrical equipment, the most common blowers of this type are the units used for drying carpet after cleaning or a fire, the blowers used for leaf sweeping and the unit hidden inside a vacuum cleaner.

Caution is necessary in selecting blowers for series installation. It is generally accepted that most pre-engineered blowers are capable of withstanding twice their catalog rated static pressure. In other words, where two blowers are installed in series the second blower housing should withstand the higher pressure. There is, however, a need for concern when the combined pressure exceeds twice the rated static pressure for one blower. In series applications involving three or more blowers, or in any system in which positive or negative pressure exists prior to the consideration of the blowers, special fan housing reinforcement may be necessary.

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