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Model Comparison
Direct Drive Fan Selection
Three propeller and drive frame combinations are available. Models SE1 and SS1 are designed for smaller
size applications where lower volumes and static pressures are found. Models SE2, SS2, SCE3 and SCS3
are designed and constructed for applications with higher volumes and static pressures.
Belt Drive Fan Selection Propeller Types
Three propeller drive frame construction levels and two blade designs are available. The application
requirements for sound and static pressure determine propeller type. Propellers are available in fabricated
steel, fabricated aluminum or cast aluminum.
Level 1
Level 1
Sizes 8 to 12
Level 2
Level 3
Level 1
Level 1
Sizes 12 to 24
Level 2Level 1
Level 3
Fabricated
Level 3
Cast Aluminum
Construction
Levels
Models
Size Range
diameter
Performance
1
Fabricated
aluminum
propeller riveted
to the hub
SE1
SS1
8 to 24 in.
(203 to 610)
Up to 6,700 cfm
(11,383) and up to
5/8 in. wg (156)
2
Fully welded and
gusseted steel
blade and hub
design
SE2
SS2
16 to 54 in.
(406 to 1372)
Up to 45,000 cfm
(76,455) and up to
1 in. wg (249)
3
Cast aluminum
air foil blades
SCE3
SCS3
SCR3
24 to 54 in.
(610 to 1372)
Up to 45,000 cfm
(76,455) and up to
1 in. wg (249)
All measurements given in in. (mm), cfm (m3/hr) or in. wg (Pa).
Construction
Levels
Models
Size Range
diameter
Performance
1
Galvanized steel
blades riveted to
the hub
SBE-1
SBS-1
20 to 54 in.
(508 to 1372)
Up to 30,000 cfm
(50,970) and up to
5/8 in. wg (156)
2
Dual thickness
galvanized steel
blades riveted to
the hub
SBE-2
SBS-2
20 to 60 in.
(508 to 1524)
Up to 53,000 cfm
(90,048) and up to
3/4 in. wg (19)
3
Fabricated, fully
welded and
gusseted steel
blade and hub
design
SBE-3
SBS-3
24 to 72 in.
(610 to 1829)
Up to 87,000 cfm
(149,513) and up
to 1 in. wg (249)
3
Cast aluminum
air foil blades
and hub design
SBCE
SBCS
SBCR
24 to 72 in.
(610 to 1829)
Up to 87,000 cfm
(149,513) and up
to 1 in. wg (249)
All measurements given in in. (mm), cfm (m3/hr) or in. wg (Pa).
Blade Designs
L Propeller: Swept, steeply pitched blade design. These propellers typically run
at lower RPMs and generate low sound levels making them the best selection for
sound critical applications or applications that require the best combination of
both air and sound performance. Typically used when the static pressure is 0.5 in.
wg (13 mm) or less.
H Propeller: Straight, moderately pitched blade. It is designed for applications
where static pressures are above 0.5 in. wg (13 mm). These propellers typically run
at higher RPMs and generate slightly higher sound levels than the “L” propellers.
L Type
H Type