Filter
Top Products
21
Performance certified is for installation Type B - Free inlet, Ducted outlet. Power rating (Bhp) does not include transmission losses. Performance ratings do not include the
effects of appurtenances (accessories). The AMCA Certified Ratings Seal applies to air performance only.
Wheel Diameter = 20 (508)
Shaft Diameter = 1
1
⁄4 (32)
Outlet Area = 2.40 ft
2
(0.223 m
2
)
Mounting Hole Size = 5/8 (16)
^Approximate Unit Weight = 405 lb (184 kg)
All dimensions in inches (millimeters)
For additional discharge positions see page 12
^Weight shown is largest cataloged Open Drip Proof motor
SFB-20 - Belt Drive
CFM OV
Static Pressure in Inches wg
0.25 0.5 0.75 1 1.25 1.5 1.75 2 2.5 2.75
3275 1362
RPM 320 402
BHP 0.37 0.53
Sones 8.1 9.1
3800 1581
RPM 343 420 487
BHP 0.51 0.70 0.90
Sones 10.3 10.1 11.3
4325 1799
RPM 369 440 503 561 613
BHP 0.70 0.90 1.13 1.36 1.61
Sones 11.3 11.5 12.6 13.1 14.6
4850 2018
RPM 396 462 521 576 628 676
BHP 0.92 1.15 1.39 1.64 1.91 2.19
Sones 12.3 13.4 13.7 13.9 15.0 16.7
5375 2236
RPM 424 485 542 594 642 689 733
BHP 1.19 1.45 1.71 1.99 2.26 2.56 2.87
Sones 14.0 15.4 14.7 14.5 15.3 16.9 18.6
5900 2455
RPM 454 511 564 614 661 704 747 788
BHP 1.52 1.80 2.08 2.38 2.68 2.98 3.30 3.64
Sones 16.1 16.8 15.5 15.3 15.5 17.3 19.0 21
6425 2673
RPM 484 537 587 634 679 722 762 801 877 911
BHP 1.90 2.22 2.52 2.83 3.15 3.49 3.81 4.15 4.89 5.26
Sones 18.6 18.4 16.8 16.1 16.5 18.0 19.8 21 24 26
6950 2892
RPM 515 565 612 657 700 741 780 818 890 925
BHP 2.36 2.69 3.02 3.36 3.70 4.04 4.41 4.76 5.51 5.92
Sones 20 19.8 18.5 17.0 18.0 19.3 21 22 25 26
7475 3110
RPM 546 593 638 681 722 761 799 836 904 938
BHP 2.88 3.24 3.59 3.95 4.30 4.68 5.05 5.44 6.20 6.61
Sones 22 21 20 19.2 19.5 21 22 24 27 28
8000 3329
RPM 578 622 665 705 745 782 819 854 922
BHP 3.47 3.86 4.24 4.61 5.00 5.38 5.79 6.18 7.02
Sones 24 23 22 22 22 23 24 25 29
8525 3547
RPM 610 652 692 731 769 805 840 875 940
BHP 4.14 4.55 4.96 5.37 5.77 6.18 6.59 7.02 7.89
Sones 26 24 24 24 24 25 26 28 31
D
o
n
o
t
s
e
l
e
c
t
t
o
t
h
e
l
e
f
t
o
f
t
h
i
s
s
y
s
t
e
m
c
u
r
v
e
cfm
36
1
⁄8
(918)
23
3
⁄4
(603)
15
7
⁄8
(403)
2
(51)
21
1
⁄8
(537)
19
1
⁄2 (495)
35 (889)
37 (940)
33
5
⁄8
(854)
22
(559)
1
1
⁄2
(38)
27
3
⁄8 (695)
24
1
⁄2
(622)
46
(1168)
21
1
⁄2
(546)
14
7
⁄8
(378)
25
5
⁄8 (651)
Maximum BHP at given RPM = (RPM/485)
3
(Maximum KW at a given RPM = (RPM/535)
3
)
Maximum RPM = 950 and Minimum RPM = 270
Tip Speed (ft/min.) = RPM x 5.24
(Tip Speed (m/s) = RPM x 0.0266)
Maximum Motor Frame Size = 215T
SFB-20