Airfoil FANS are available in the following sizes, wheel designs, and air & pressure ranges.


Sizes Wheel Designs Air Volume & Static Pressures
245-1200 BI - Backward Inclined Blades To 186,000 CFM & 16" W.G.

365-1200

 AF - Airfoil Blades

To 188,000 CFM & 16" W.G.

1320-2175

 BC - Backward Curved Blades

To 710,000 CFM & 16" W.G.

Aerodynamic features include non-overloading horsepower characteristics and high efficiency.

WHEELS

BI wheels, including blades, wheel flange and backplate, are made of high-strength steels as standard. Blades are welded to the spun wheel flange and backplate.

AF wheels, including blades, wheel flange and backplate, are also made of high-strength steels as standard. Blades are die-formed and welded to the spun wheel flange and backplate.

BC wheels are made of die-formed, high-strength steel blades, die-formed steel flange and steel backplate as standard. Blades are welded to wheel flange and backplate.

Bl and AF double-width, double inlet wheels utilize a common centerplate wheel design. BC double-width, double-inlet fans utilize two BC wheels.

All Airfoil fan wheels are offered with cast iron hubs. Hubs are designed with a high hub-to-wheel ratio which adds to the overall structural integrity of the wheel. Hubs are straight bored to a close tolerance fit to the shaft. Wheel/hub assemblies are keyed and set screwed to lock the wheel to the fan shaft.

State-of-the-art CAD tools are used to design and detail the entire fan line. Multi-light source shading of a 3-D model is shown.





CONSTRUCTION & DESIGN OPTIONS

Inspection and Access Doors
are gasketed, hinged and shaped to conform with the fan scroll contour. Handled fasteners are used to secure the closed door. All hardware remains on the fan when open. Raised doors to facilitate application of external insulation are also available.

Split Housings
are fitted with bolted companion surfaces along the horizontal centerline as standard. Other horizontal, vertical and pie-shaped splits are available. Splits are used for access to fan interior, to meet restricted openings or because of shipping dimensional constraints.

Bearings.
Where not standard, double row spherical roller bearings in split pillow block housings are available for all classes and arrangements. Contact your Buf-falo Forge Company Sales En-gineer for bearing configuration

Shaft Seals
are constructed of a non-ferrous material with close tolerance to shaft diameter. Attached to the fan housing the shaft seals limit air leakage around the shaft.

Heat Slinger.
Split aluminum shaft cooler mounted on fan shaft between housing and inboard bearing dissipates conducted heat. Required for 450°F temperature operation. 80,000 Hr. L-10 life bearing and heat slinger required for 600°F temperature operation.

Outlet Connections.
Slip connection is standard on Class 1 & 2. Flanged connection is standard on Class 3. Flanged connection is also available as an option for Class 1 & 2. Drilling of flange is available.


Drain Connections are half pipe couplings with or without a flange welded to the fan scroll at its lowest point.

Inlet Connections can be furnished with a square or round, slip or flanged connection. Drilling of flange is available.

Channel Base. All fan arrangements can be furnished with a sub-base. Bases are made of structural steel and can be provided with or without vibration isolators. Inertia bases that can be filled with concrete after installation are also available.





VOLUME CONTROL:

Variable Inlet Vanes are available as an option for all classes of fans. Refer to page 3 for typical Variable Inlet Vane performance information.

Outlet Dampers are available with opposed and paralel blades. Dampers are designed to match fan outlet velocity, pressures and temperature and have flange connections. Fans require a flanged outlet if damper is to be mounted on unit

OSHA GUARDING:

Belt Guards and Shaft Guards are standard per OSHA require-ments. Constructed of mill galvanized steel, belt guards are solid or perforated metal sides with openings for tachometer readings. Shaft guards are perforated metal. Shaft guards are used for heat slinger guarding. When a shaft guard is used in conjunction with a belt guard, the entire rotating assembly is guarded.

Coupling guards are furnished to OSHA standards. Constructed of mill galvanized steel, the coupling guard bolts in place.

Inlet and Outlet Screens of galvanized steel are furnished per OSHA requirements.

Weather Covers are furnished to OSHA standards of mill galvanized steel on arrangement 10 fans. Covers motor, drive, fan shaft and bearing.

SPARK RESISTANT CONSTRUCTION

Spark resistant construction, in accordance with AMCA standards, is available as an option on Airfoil fan single inlet arrangements 1,4,8,9 & 10 only. Bearings are not placed in air or gas stream. User shall ground all fan parts. AMCA Type "B" or "C" conform to requirments of NBFU pamphlet 91 for fans handling flammable vapors.

TYPE “A”: All parts in contact with air or gas handled are of non-ferrous material... aluminum wheel, housing with inlet cone and monel shaft. All other parts are standard steel.

TYPE “B”: Aluminum wheel and a non-ferrous ring around the opening through which shaft passes. All other parts are standard steel.

TYPE “C”: Non-ferrous inlet cone or non-ferrous ring on steel inlet cone and around the opening through which shaft passes. All other parts are standard steel.

Offered for fans handling explosive mixtures, the type of construction depends upon the degree of spark protection desired. Non-sparking construction Everdur is also available.

CORROSION RESISTANT CONSTRUCTION

Depending upon conditions, Canada Blower can furnish fans with special coatings, galvanizing, rubber coverings or special metal construction. Fans with special coatings can be furnished per paint manufacturers recommended surface preparations, such as continuous welding, rounding of sharp edges, sand blasting, etc. as required. Your Canada Blower Sales Engineer can offer technical advice along with recommendations for corrosion resistant applications.



OTHER AVAILABLE OPTIONS

Consult your Canada Blower Sales Engineer for above options.





ARRANGEMENTS

SINGLE INLET

ARR. 1 SWSI
For belt drive or direct connection. Impeller overhung. Two bearings on base.


ARR. 3 SWSI
For belt drive or direct connection. One bearing on each side and supported by fan housing.

ARR. 4 SWSI
For direct drive. Impeller overhung on prime mover shaft. No bearings on fan. Prime mover base mounted or Integrally directly connected.


ARR. 9 SWSI
For belt drive. Impeller overhung, two bearings, with prime mover outside base.

ARR. 7 SWSI
For belt drive or direct connection. Arrangement 3 plus base for prime mover.


ARR. 8 SWSI
For belt drive or direct connection. Arrangement 1 plus extended base for prime mover.


ARR. 10 SWSI
For belt drive. Impeller overhung, two bearings, with prime mover inside base.


DOUBLE INLET

ARR. 3 DWDI For belt drive or direct connection. One bearing on each side and supported by fan housing.

ARR. 7 DWDI For belt drive or direct connection. Arrangement 3 plus base for prime mover.


DIRECTION OF ROTATION & DISCHARGE


CCW-TH
CCW90
Counter-Clockwise
Top Horizontal


CW-TH
CW 90
Clockwise
Top Horizontal


CW-BH
CW 270
Clockwise
Bottom Horizontal


CCW-BH
CCW 270
Counter-Clockwise
Bottom Horizontal


CW-UB
CW 360
Clockwise Up Blast


CCW-UB
CCW 360
Counter-Clockwise
Up Blast


CW-DB CCW180 Counter-Clockwise Down Blast


CW-D6
CW 180
Clockwise Down Blast


CCW-TAD
CCW 135
Counter-Clockwise Top Angular Down


CW-TAD
CW 135
Clockwise Top Angular Down


CW-BAU
CW 315
Clockwise Bottom Angular Up


CCW-BAU
CCW 315
Counter-Clockwise Bottom Angular Up


CCW-TAU CCW 45 Counter-Clockwise Top Angular Up


CW-TAU CW 45 Clockwise Top Angular Up


CW-BAD CW 225 Clockwise Bottom Angular Down


CCW-BAD CCW 225 Counter-Clockwise Bottom Angular Down

Direction of Rotation is determined from drive side for either single or double inlet fans. (The driving side of a single inlet fan is considered to be the side opposite the inlet regardless of actual location of the drive.) For fan inverted for ceiling suspension, Direction of Rotation and Discharge is determined when fan is resting on the floor.






Size 600 AF Airfoil Arr. SWSI CL2 with outlet flange




Size 600 BI Airfoil Arr. DWDI CL2 with outlet flange




Size 245 BI Airfoil Arr. 3 DWDI CL2 with outlet flange


Size 365 AF Airfoil Arr. 1 SWSI CL2 with outlet flange



TYPICAL SPECIFICATION:

Furnish Canada Blower Airfoil, backward inclined (Bl), airfoil (AF) and backward curved (BC) - supply, return and exhaust fans as indicated on drawings and in accordance with the fan schedule. Size 245 to 1200 to be backward inclined and/or airfoil fans with air performance AMCA certified per AMCA Publication 211 and with sound certification per AMCA Publication 311. Size 1320 to 2175 to be backward curved fans and shall be AMCA certified for air performance per AMCA Publication 211. Fans shall be centrifugal type having non-overloading horsepower characteristics. Fans to be constructed of steel and coated with a rust-inhibitating paint primer.

Fan WHEEL diameters are to be in accordance with AMCA Publication 99. Fan wheels to be welded construction using high strength steels. Blades to be welded to the wheel flange and backplate. Wheel hubs to be cast iron or fabricated steel and attached to the backplate. Fan wheel is to be secured to the fan shaft with a key and two set screws.

Fan SHAFT to be solid, cold finished steel, turned ground and polished. First critical shaft speed for Class 1 and 2 to be at least 25% greater than the maximum operating speed and Class 3 first critical shaft speed to be at least 40% greater than the maximum operating speed.

Fan BEARINGS shall have a minimum L-10 life of (20,000, 40,000 or 80.000) hours and/or minimum L-50 life of (100,000, 200,000 or 400,000) hours as defined by ASA and the Anti-Fiction Bearing Manufacturers’ Association. Bearings to be foot mounted and either single row ball or double row spherical roller type in a one piece cast iron pillow block, or a double row spherical roller type in a split pillow block. Bearings to rigidly supported on structural steel supports and/or bases.

Fan HOUSING outlet areas to be in accordance with AMCA Publication 99. Fan housing to be constructed of heavy gauge steel with sides and scrolls continuously welded. Housings to be fitted with a spun or die formed inlet cone which is designed to match the fan wheel flange for smooth efficient air flow from the fan inlet to the fan discharge. Fan housing structural members to be designed to allow removal of fan wheel, shaft and bearings without disturbing the structural integrity of the fan housing

The entire fan assembly to be factory RUN TESTED and dynamically BALANCED to not exceed 0.1 inches per second velocity as measured on an IRD or PMC Analizer.

Size 1965 BC Airfoil ARR. 3 DWDI Class 2 with 98.25 inch. dia. wheel and independent pedestals for high horsepower drive. Fan is setup for a full scale performance test in accordance with AMCA 210 Standards in Canada Blower’s inhouse AMCA registered test facility.


Size 805 AF Airfoil Arr. SWSI CL1 with outlet flange




Size 660 BI Airfoil Arr. DWDI CL1 with outlet flange




Size 245 BI Airfoil Arr. 3 DWDI CL1 with outlet flange