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Standard Construction Features
Standard Construction Features
SFD SFB
SWB
100 200 300
1 Wheel
SFD and SFB fans have forward-curved centrifugal wheels constructed of
die formed steel with blades securely riveted to a steel backplate and rim.
Each wheel is statically and dynamically balanced to precise tolerances.
SWB Series 100 and 200 through size 210 have backward-inclined non-
overloading centrifugal wheels constructed of aluminum. Series 200, sizes
212 and larger and Series 300 wheels are constructed of steel or aluminum.
Backward-inclined wheels are made of a heavy-gauge material with single-
thickness blades securely riveted or welded to a heavy-gauge backplate
and wheel cone. SWB Series 300 fans are available with aluminum airfoil
wheels. Each wheel is statically and dynamically balanced to precise
tolerances.
Forward Curved
Forward Curved
Backward Inclined
Backward Inclined
Backward Inclined or Airfoil
2 Finish
All structural steel parts are phosphate treated and coated with
Greenheck’s Permatector™ for a long lasting finish. Galvanized
construction remains unpainted.
•See housing and drive frame information for specific material and coating.
— — — — —
3 Housing
SFD and SWB Series 100 housings are constructed of galvanized steel.
SFB and SWB Series 200 and 300 housings are constructed of steel
and coated with Permatector™. Both are available in clockwise or
counterclockwise rotation and are field rotatable to the eight standard
discharge positions. Housing sides are bonded to the fan scroll with an
airtight lock seam. Fully welded scrolls are available on SFB and SWB
Series 200 and 300 models.
Galvanized
Painted Steel
Galvanized
Painted Steel
or Aluminum
Painted Steel
4 Housing
Supports
Housing supports are constructed of heavy gauge-steel with formed
flanges for extra strength.
5 Mounting
Holes
Base rails have prepunched mounting holes which allow for easy
installation.
6 Drive
Frame
Series 100 and 200 drive frames are constructed of rugged, welded
and coated steel members (Series 300 drive frames are constructed of
reinforced heavy gauge galvanized steel) supporting the shaft and bearings
to provide rigid reinforcement for the housing. SFD drive frames are
constructed of galvanized steel, bolted and available in arrangement 4.
SFB and SWB are arrangement 10.
Galvanized
Painted Steel
Painted Steel
Painted Steel
Galvanized
7 Fasteners
Corrosion-resistant fasteners are used to secure unit base and blower
scroll assembly.
8 Motor
Heavy-duty ball bearing motors are carefully matched to the fan load. Open
drip proof, totally enclosed and explosion resistant enclosures are available.
9 Inlet Cone
Streamlined inlet cone design provides for low turbulence air intake,
reducing intake losses and sound levels.
Belt Drive Only Features
10 Motor
Plate
A pivoting motor plate with adjusting screws make belt tensioning a quick
and easy operation.
11 Drive
Assembly
Machined, cast iron pulleys are factory set to the required RPM and are
adjustable for final system balancing for applications with 10 hp or less
motors. Sized for a minimum of 150% of driven horsepower.
12 Fan Shaft
Precision turned, ground and polished solid steel shafts are sized so the
first critical speed is at least 25% over the maximum operating speed.
Stainless steel shafts are available on SWB Series 200 and 300 fans.
13 Bearings
Heavy-duty, self-aligning pillow block ball bearings are selected for a
minimum L
10
life in excess of 100,000 hours (L
50
average life of 500,000
hours) at maximum cataloged operating conditions.