Industrial building ventilating fans, process exhaust air blowers, OEM fan ventilators, high pressure blowers, high temperature exhaust and circulation oven fans; and wall / roof exhaust propeller fan ventilators. SALES OF VARIOUS ROOF AND WALL VENTILATORS FANS BLOWERS. Buffalo fan, New York designers of industrial turbo blowers, commercial fans, high-temperature fan blowers, high pressure suction blowers, OEM fans, roof and wall exhauster ventilators, ventilation e fans, process and O.E.M. blower ventilators, custom built fans, ventilators, dust collection and combustion OEM blowers, oven circulation plug fans, heat exchangers and air systems of Industrial Gas Engineering, American Coolair, ILG, IGE, NYB, I.L.G., I.G.E., TCF. fans
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BUFFALO FAN

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Propeller Fan Products

PROPELLER WALL FANS

Buffalo Fan Co. offers axial fans, propeller ventilators and centrifugal type blowers to meet virtually any requirement. 

Fans and blowers are built in larger sizes, smaller sizes and with performance capabilities other than the standard ventilator models listed are available. Custom fan modifications can also be supplied for unique applications. 

Type CBC Propeller Fans

A general ventilation fan designed for efficiency and economy. 

Suggested for use in commercial and industrial applications including factories, warehouses, gymnasiums, underground parking garages or any area requiring ventilation where side wall mounted fans are desirable. 

Type CBC fans are rugged and dependable. They are available in a large selection of CFMs and pressures. 

The fans can be arranged for exhaust or supply ventilation use. 

A wide choice of fan accessories are available to complete a well-balanced and specifically engineered air movement system. 

A direct drive general Type CBU Propeller Fan designed for use in commercial and industrial ventilating  applications where low sound levels are important and relatively low CMFs are appropriate. 

Type CBCD fans combine the durable construction and reliability needed for industrial applications with the quietness and good looks required for office or laboratory. They offer the low maintenance requirements that are characteristic of direct drive fans. 

By combining the Type CBCD fan with a companion wall sleeve and other accessories, a ready-to-mount wall ventilation package is provided. 

The Type CBCD fan may be assembled for air exhaust or supply usage.

CBCA / CBCX - BELT DRIVNE WALL PROPELLER FANS
CBCA - Belt Drive: 4,000 to 30,000 CFM
0" to 1" Static Pressure
CBCX - Belt Drive: 20,000 to 60,000 CFM
to 1" Static Pressure
Propeller type wall exhaust fan
CBC / CBCL - BELT DRIVEN WALL PROPELLER FANS
CBC - Belt Drive: 15,000 to 120,000 CFM
to 1" Static Pressure
CBCL - Belt Drive: 10,000 to 60,000 CFM
to 1" Static Pressure
Wall exhaust fan ventilator.
CBCD - DIRECT DRIVE WALL PROPELLER FANS
Belt Drive: 1500 to 61500 CFM
to 1.5" Static Pressure
Wall supply fan ventilator
CBCA WALL PROPELLER FANS
CBCA - Belt Drive: 3,000 to 30,000 CFM
to 0.25" Static Pressure
American coolair fan
CBU / CBP - DIRECT DRIVE WALL PROPELLER FANS
CBU - Direct Drive: 500 to 7,000 CFM
to 0.5" Static Pressure
CBP - Direct Drive: 250 to 3,500 CFM
to 0.5" Static Pressure
American Coolair Ventilator Fan


UPBLAST ROOF FANS

General ventilation Type CBJ power roof ventilators (PRV) are designed for efficiency and economy. 

Type CBJ PRV fans are suggested for use in commercial and industrial applications including factories, warehouses, commercial buildings, machine rooms or any situation requiring the movement of air. 

Type CBJT PRVs are suggested for use in industrial applications where it is necessary for the fan assembly to be located above the roof and where motor, belts and bearings must be isolated from the airstream. (Type CBJTB) 

Buffalo Fan Co. upblast power roof ventilators are designed for long life, low maintenance and all-weather fan performance. 

The proven upblast design is the most cost effective roof exhauster built today and offers the best value of all PRV fan types. 

With many commercial and industrial buildings such as factories, warehouses, parking garages, shopping malls and department stores a means of venting hot gases and smoke in the event of a fire is required. 

Type CBHS PRVs are especially designed, built and proven by independent test to meet this essential need. They reliably extract large volumes of hot gases and smoke regardless of building configuration, location or weather conditions. They withstand high temperatures for long periods. 

A reliable fan ventilation system that can operate during a fire is both vital and essential. It prevents smoke logging, allows people to escape quickly, minimizes damages to property and contents and enables firemen to attack the fire without hindrance. 

These PRV ventilators have the added advantage of providing normal day-to-day ventilation and in many cases can also be fitted with ductwork for use in multi-story buildings. 

The unique Type CBHS power roof ventilator concept provides a solution for emergency heat and smoke venting that is dependable under the most extreme circumstances.

CBJH / CBJX - BELT DRIVE AXIAL ROOF VENTILATOR
CBJH - Belt Drive: 6,000 to 30,000 CFM
to 0.5" Static Pressure
CBJX - Belt Drive: 25,000 to 60,000 CFM
to 0.5" Static Pressure 
Roof ventilator fan
CBJ - BELT DRIVE AXIAL ROOF VENTILATORS
CBJ - Belt Drive: 20,000 to 120,000 CFM
to 1" Static Pressure 
Roof Exhaust Fan Ventilator
CBJD DIRECT DRIVE AXIAL ROOF VENTILATORS
CBJD - Belt Drive: 2,000 to 60,000 CFM
to 1" Static Pressure 
Up-blast roof exhaust fan ventilator
CBJT / CBJTB BELT DRIVE AXIAL ROOF VENTILATORS
CBJT - Belt Drive: 2,000 to 100,000 CFM
to 1" Static Pressure
CBJTB - Belt Drive: 2,000 to 50,000 CFM
to 1.5" Static Pressure 
Tubeaxial Roof Exhaust Fan Ventilator
CBJTD DIRECT DRIVE AXIAL ROOF VENTILATORS
CBJTD - Belt Drive: 2,500 to 65,000 CFM
to 1" Static Pressure 
Tubeaxial Roof Fan Ventilator


AXIAL DUCT FANS

A high performance, Type CBT axial flow fan designed for duct connection applications. 

It is suggested for commercial and industrial uses such as make-up air systems, booster fans, return air fans or to exhaust contaminated or high temperature air. 

Type T fans are available in a large selection of CFMs and operate efficiently against static pressures up to 2 inches. 

A true vane axial Type CBV fan designed for use in a wide range of commercial or industrial applications. 

High pressure efficiency permits the fan to be installed anywhere in the system; in any position. It can be used for either supply or exhaust by simply turning the entire fan unit to flow air in the desired direction.

Type V fans are extremely compact and well suited to locations where space is limited. In many instances, these fans are mounted directly to the duct work. 

As a result of very close tolerances and carefully matched vanes and rotor, the Type V fan offers exceptional performance within its ventilator size range.

CBT / CBTE - BELT DRIVE AXIAL DUCT FANS
CBT - Belt Drive: 1,500 to 100,000 CFM
to 2" Static Pressure
CBTE - Belt Drive: 2,500 to 50,000 CFM
to 1.5" Static Pressure 
Tubeaxial Fan Blower
CBTD - DIRECT DRIVE AXIAL DUCT FANS
CBTD - Direct Drive: 1,500 to 80,000 CFM
to 2" Static Pressure 
Duct Fan Ventilator
CBVD / CBVB - DIRECT AND BELT DRIVE VANE AXIAL DUCT FANS
CBV - Direct Drive: 250 to 7,000 CFM
to 2" Static Pressure 
Vaneaxial Fan Blower


HOODED ROOF FANS

General ventilation Type CBP power roof ventilators designed to move large volumes of air quietly, efficiently and dependably. 

These fans are suggested for use in commercial and industrial applications including factories, warehouses and large commercial buildings. 

These rugged ventilators PRVs are available in a broad range of CMFs and a variety of configurations. 

There are types offering belt and direct driven propellers, exhaust, supply or reversible are movement, and filtered air supply. 

Most hooded PRVs can be supplied less fan component for use as a gravity ventilator or as an air intake. 

At a later date this unit can be converted to a power roof ventilator by simply installing the proper style Buffalo Fan Co. Type C Fan. 

Combinations of these various types can be used and still maintain a uniform and attractive rooftop ventilator  appearance. 

Use of the power combination of hooded power roof ventilators assures an effective ventilation system at exceptionally low cost. 

Type CBRE and CBRS fan recirculators are multi-purpose power roof ventilators. 

These ventilators are suggested for use in commercial and industrial applications where there is sufficient ceiling height to create a temperature differential between the floor and ceiling. 

These ventilation applications include factories, warehouses and large commercial buildings. 

Type CBRE and CBRES recirculators function as normal power roof ventilators in warmer weather and as an energy saving recirculation system in cold weather. 

Each unit is equipped with a reversible fan wheel that redistributes warm ceiling air throughout the plant and reduces the building's heating requirement. WIth the flip of a switch, it can function as a conventional roof ventilator.

CBPD - DIRECT DRIVE-EXHAUST AXIAL ROOF VENTILATORS
CBD - Exhaust - Direct Drive: 3,000 to 40,000 CFM
to 1" Static Pressure 
Roof Supply Fan Ventilator
CBPE / CBPS - BELT DRIVE EXHAUST SUPPLY AXIAL ROOF VENTILATORS
CBPEB - Exhaust - Belt Drive: 4,000 to 95,000 CFM
to 1" Static Pressure
CBPS - Supply - Belt Drive: 3,500 to 100,000 CFM
to 1" Static Pressure
Roof Supply Ventilator Fan
CBRE / CBRS-BELT DRIVE TWO WAY-THREE WAY-FOUR WAY AXIAL POWER ROOF VENTILATORS
CBRE - Exhaust / Recirculator - Belt Drive: 4,500 to 50,000 CFM
to 0.5" Static Pressure
CBRS - Exhaust / Supply / Recirculator - Belt Drive: 2,500 to 40,000 CFM
to 0.5" Static Pressure
Roof Fan Recirculator Ventilator
CBRD / CBRSD-DIRECT DRIVE TWO WAY-THREE WAY-FOUR WAY AXIAL POWER ROOF VENTILATORS
CBRD - Exhaust / Recirculator - Direct Drive: 4,500 to 50,000 CFM
to 0.5" Static Pressure
CBRSD - Exhaust / Supply / Recirculator - Direct Drive: 2,500 to 40,000 CFM
to 0.5" Static Pressure
Recirculation roof fan ventilator designs. Supplier 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.
Type CBHS - Heat and Smoke Removal Power Roof Ventilator With many commercial and industrial buildings, a means of venting hot gases and smoke in the event of a fire is required. Type CBHS PRVs are especially designed, built and proven by independent tests to meet this essential need. They reliably extract large volumes of hot gases and smoke regardless of building configuration, location or weather conditions. The withstand high temperatures for long periods. These fans PRVs have the added advantage of providing normal day-to-day ventilation and and in many cases can be fitted with ductwork for use in multi-story buildings. 
TYPE CBHS - HEAT AND SMOKE REMOVAL POWER ROOF VENTILATOR
CBHS - Belt Drive: 2,500 to 100,000 CFM
to 1" Static Pressure 
Tubeaxial Roof Exhaust Fan Ventilator Blower
Type CBHSE - Heat and Smoke Ventilators The HSE up-blast power roof ventilators are designed and built to meet the increasing need for power venting the combustion by-products of a fire. These units are designed to be installed in the roof systems of shopping centers, wholesale warehouses, hotel atriums and any other place where building codes require the removal of smoke and heat by power roof ventilators. 
TYPE CBHSE - HEAT AND SMOKE VENTILATOR
CBHSE - Belt Drive: 1,750 to 50,00 CFM
to 1" Static Pressure 
Smoke exhaust fan roof exhauster
Type CBPT - Power Tube Fan Make-Up Air System 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 problems. Process exhaust blower 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 combustion from flues and stacks of heaters and process equipment. Drafts are created that are a discomfort to employees. The Buffalo Fan Co. Power Tube Fan Make-Up Air System solves all of these problems economically, even on the coldest winter day. 
TYPE CBPT - POWER TUBE FAN MAKE-UP AIR SYSTEM
CBPT - 3,500 to 30,000 CFM

Power tube fan - make-up air handling unit

Type CBFG Fans For the particular problems related to corosive environments, Buffalo Fan offers the CBFG Fiberglass Fan. The CBFG is molded in a one piece fiberglass fan housing unit that insures safety and efficiency of operation. The CBFG fans utilizes cast aluminum blades, all aluminum motor mounts and shutters to promote resistance to corrosion. These direct drive fans are designed for applications where a minimum of maintenance and economical operation are required. 
TYPE CBFG - FIBERGLASS FANS
CBFG - 2,000 to 12,000 CFM

Fibrglass FRP wall exhaust fan exhauster ventilator

CBN All Galvanized Economy Fans Now you can buy Buffalo Fan quality and our unique blade design at a savings to you and our customers. The CBN Fans are the answer to your ventilation requirements. We utilize our innovative ventilator drive assembly which applies power through the V belts directly to the propeller. Blade load is concentrated directly over the bearings for more economical operation and longer fan bearing life. 
TYPE CBN - ECONOMY FANS
CBN - 10,000 to 20,000 CFM
to 0.2" Static Pressure 
Greenhouse wall fan exhauster ventilator
Type CBM Fan Mobile Air Circulator High volume, heavy duty mobile air circulator ventilator for cooling factories, warehouses, garages, loading docks, processing lines or any other hot, inaccessable areas where people must work. The Buffalo Fan Mobile Air Circulator can be rolled to wherever it is needed on four heavy duty casters. 
TYPE CBM - MOBILE AIR CIRCULATOR
CBM - 11,000 CFM 
Mobile air circulator mancooler fan
Type CBMB Fan Packages for Metal Buildings Type CBMB fan packages are specifically designed to provide for the general ventilation of commercial and industrial metal buildings. These complete packages greatly simplify the specification and use of ventilation equipment in such structures. They are shipped completely assembled and include the proper wall housing, fan unit, shutter and guard. Installation of Type MB wall mounted fan units is simplified by ther compatibility with typical metal building construction. 
TYPE CBM - FAN PACKAGES FOR METAL BUILDINGS
CBM - Exhaust Belt Drive- 4,000 to 30,000 CFM, to 0.5" Static Pressure 
Wall Fan Smoke Exhauster

More

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Industrial process blowers, fans, ventilators.

Buffalo Fan blowers and ventilators : buffaloblower





The fan engineer must understand the limitations of materials and various failure mechanisms, such as high stress, stress to rupture, and creep. Sometimes, it is necessary to consider high cycle fatigue, low cycle fatigue in cyclical operation with speed changes, and numerous start-stop cycles. If rapid temperature changes are encountered, transient analysis may be required due to thermal stresses. When fans are exposed to elevated temperatures, many aspects of the fan design must be reviewed to make sure the fan will withstand the extreme temperatures and that the fan is appropriately designed for the application. Depending on the exposed temperature levels, the following are to be considered:

• Materials of construction for the wheel, shaft, and hub
• Wheel to hub attachment
• Materials of construction for the housing including insulation
• Bearings and lubrication
• Shaft seals
• Shaft cooling (air-cooled, water-cooled, etc.)

Limits on the operating temperature for standard fans are defined by the arrangement of the fan. For example, the maximum temperature for a standard fan that does not have a bearing in the airstream can run up to 300°F. For standard fans that have a bearing in the airstream, the maximum operating temperature is limited to the maximum temperature that the bearing can handle, which is typically about 130°F.

Carbon steel, low alloy high strength steels, and chrome moly steels are satisfactory for a temperature range of 900° to 1000°F, depending on stress levels. Heat resistant alloys such as stainless steels (304, 316, 347), Incalloy 800HT, 230, Inconel (600, 625, 617), Multimet, Haynes 25, etc. should be used for higher temperatures up to 1800°F. Again, the material chosen also depends on the stress levels and the material properties at elevated temperatures. Temperature derates lower the maximum speed of a fan wheel to account for the lower material strength at elevated temperatures. The fan wheel must sustain the highest stress of all the fan components. It is very important that the material used on the blower wheel is strong enough to handle the stress at high temperatures. At higher temperatures, material eep must be considered.

Bearings usually require high temperature lubricants and sometimes circulating oil or static oil in a monoblock. Bearings can be kept cool in high temperature applications by using a shaft cooler and a shaft seal. For higher temperature fans, water cooling can be used to cool the shaft. In this case, the fan should be belt driven in order to install a rotating union to circulate the water over the shaft. Bearings should be kept out of a high temperature airstream and should never run in air temperatures hotter than 130°F. The inboard bearing, which is the bearing nearest the fan housing, should be moved away from the fan housing to create some space for the heat to dissipate. The space created between the inboard bearing and the fan housing allows for the use of a shaft cooler and shaft seal. Bearing temperatures should be monitored and should not be allowed to exceed 200°F at speeds higher than 2500 RPM and 220°F at speeds below 2500 RPM. Bearings should be selected to allow for free movement of the shaft lengthwise due to temperature changes. One bearing should be fixed, serving as an anchor bearing to locate the shaft lengthwise. The bearing closest to the drive end is normally fixed. All other bearings should be expansion bearings to permit the shaft to move lengthwise. The thermal growth of the shaft may limit the bearing used.

A shaft cooler is a small fan that clamps on the shaft between the fan housing and the inboard bearing. The shaft cooler draws cool air over the shaft and bearings as the shaft rotates to dissipate the heat. A shaft cooler is recommended for all applications over 300°F. Generally, the pedestal must be modified to allow room for the shaft cooler. This will increase the distance between the inboard bearing and the wheel. This dimension, referred to as the overhang dimension, is critical in determining the safe speed of the shaft. As the overhang dimension is increased, the shaft safe speed becomes lower. During maintenance repairs, it is very important that the overhang dimension is never increased. When the temperature exceeds 800°F, it is necessary to separate the fan pedestal from the fan housing. By doing this, the amount of heat conducted through the pedestal and to the bearings and motor is greatly reduced.

For blower housing material, carbon steels are satisfactory for temperatures up to 800°F and Corten is often used for temperatures up to 1000°F. For higher temperatures, stainless steels and Inconel may be required. A customer may want to keep the heat of the airstream from heating up the fan housing and radiating out to the surrounding area. Insulating the fan accomplishes this. There a few ways to insulate a fan, but the main idea is to create a second fan housing offset from the main fan housing and then fill the gap between the two with insulation. It is common to have 2" - 6" of insulation depending on the temperature of the airstream and the need for the outer skin to be cool. For fans that require an access door and also have an insulated housing, the access door is raised from the fan housing to the outer insulation skin by building a box between the two fan housings.

Up to this point, the discussion has centered on centrifugal fans. It should be mentioned that there are a few modifications that are specific to axial fans. Standard axial fans are good to 200°F. By moving the bearing housing upstream of the wheel, opening the bearing housing to the wheel, and by adding a cooling wheel to the shaft to pull cool air over the shaft and bearings, the maximum operating temperature goes up to 300°F. With a change of wheel material to aluminum A240, some axial fans can be made to run in temperatures as high as 600°F.

When a fan is installed in a high temperature application, it is important for the engineer to properly design the components of the fan. This includes, but is not limited to, the wheel, shaft, bearings, and housing. The wheel material should be selected to provide adequate strength at the elevated temperature. The shaft and bearings may require a cooling system or other means to keep them from overheating. The bearings should have proper lubrication that can handle the higher operating temperatures. Sometimes an insulated housing should be manufactured to keep the heat from radiating out to the surroundings of the fan. High temperature fans, if designed properly, can provide years of dependable service.
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