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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 sound power level ratings shown are in decibels, referred to 10-12 watts, calculated per AMCA Standard 301. Values shown
are for inlet LwiA sound power levels and inlet hemispherical sone levels for installation type B: Free inlet, Ducted outlet, calculated per AMCA Standard 301. The AMCA
Certified Ratings Seal applies to air performance only.
SWB-333 - Belt Drive
Series 300
Wheel Diameter = 33 (838)
Shaft Diameter = 1
15
⁄16 (49)
Outlet Area = 6.26 ft
2
(0.582 m
2
)
^Approximate Unit Weight = 1231 lb. (560 kg)
All dimensions in inches (millimeters)
For additional discharge positions see page 13
^Weight shown includes largest cataloged Open Drip Proof motor and weatherhood
74
9
⁄16
(1894)
31
7
⁄8 (810)
41
9
⁄16 (1056)
3
1
⁄2
(89)
34
9
⁄16
(878)
40
(1016)
35
(889)
55
9
⁄16
(1175)
60
3
⁄4
(1543)
38
3
⁄4 (984)
56
3
⁄8 (1432)
60
9
⁄16 (1538)
33
3
⁄8
(848)
26
3
⁄16
(665)
38
1
⁄4
(813)
25
(635)
4
3
⁄16
(106)
Maximum BHP at a given RPM = (RPM/445)
3
(Maximum KW at a given RPM = (RPM/491)
3
)
Maximum RPM = 1163
Tip Speed (ft/min.) = RPM x 8.64
(Tip Speed (m/s) = RPM x 0.0439)
Maximum Motor Frame Size = 256T
CFM OV
Static Pressure in Inches wg
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
7500 1198
RPM 440 535 615 686 756 821
BHP 0.96 1.61 2.31 3.09 3.94 4.86
Sones / LwiA 10 / 71 11.3 / 74 13 / 76 14.9 / 78 17.8 / 81 21 / 83
9000 1437
RPM 489 576 650 717 779 836 895 951 1004
BHP 1.32 2.09 2.87 3.71 4.62 5.57 6.60 7.68 8.80
Sones 11.7 / 74 13.1 / 76 14.7 / 78 16.1 / 79 17.6 / 81 19.7 / 83 23 / 85 26 / 87 31 / 89
10500 1677
RPM 547 619 690 753 811 867 919 968 1018 1068
BHP 1.81 2.68 3.57 4.49 5.43 6.47 7.55 8.65 9.83 11.1
Sones / LwiA 14.1 / 77 15.3 / 78 16.8 / 80 18 / 81 19.2 / 82 21 / 83 22 / 85 25 / 86 28 / 88 31 / 90
12000 1916
RPM 606 666 733 794 849 901 950 999 1044 1088
BHP 2.42 3.36 4.41 5.41 6.46 7.53 8.66 9.86 11.1 12.3
Sones 16.8 / 80 17.8 / 81 19 / 82 20 / 83 21 / 84 23 / 85 24 / 86 26 / 87 27 / 88 29 / 89
13500 2156
RPM 666 721 778 836 890 940 987 1031 1075 1118
BHP 3.17 4.21 5.34 6.50 7.64 8.81 10.0 11.2 12.5 13.9
Sones / LwiA 19.8 / 83 20 / 83 21 / 84 23 / 85 24 / 86 25 / 87 27 / 87 28 / 88 29 / 89 30 / 90
15000 2396
RPM 727 779 826 880 932 980 1026 1070 1111 1150
BHP 4.08 5.23 6.40 7.72 9.00 10.3 11.6 12.9 14.2 15.6
Sones / LwiA 23 / 85 23 / 85 24 / 86 25 / 87 27 / 88 28 / 88 30 / 89 31 / 90 32 / 90 33 / 91
16500 2635
RPM 789 838 882 927 976 1023 1067 1109 1150
BHP 5.16 6.44 7.70 9.05 10.5 11.9 13.3 14.7 16.1
Sones / LwiA 26 / 87 26 / 87 27 / 88 29 / 89 30 / 89 31 / 90 32 / 91 33 / 91 35 / 92
18000 2875
RPM 852 898 940 978 1023 1067 1110 1151
BHP 6.44 7.83 9.21 10.6 12.1 13.7 15.3 16.8
Sones / LwiA 29 / 89 30 / 90 31 / 90 32 / 91 34 / 91 35 / 92 36 / 92 37 / 93
19500 3115
RPM 916 958 998 1035 1070 1114 1154
BHP 7.94 9.42 10.9 12.4 14.0 15.7 17.4
Sones / LwiA 33 / 91 34 / 92 36 / 92 36 / 93 37 / 93 38 / 93 39 / 94
21000 3354
RPM 981 1019 1058 1093 1127 1161
BHP 9.67 11.3 12.9 14.5 16.1 17.8
Sones / LwiA 38 / 93 39 / 94 39 / 94 40 / 94 41 / 95 42 / 95
22500 3594
RPM 1046 1081 1117 1152
BHP 11.6 13.3 15.1 16.8
Sones / LwiA 42 / 95 43 / 95 43 / 96 45 / 96
Static Pressure (in. wg)
Volume (cfm X 1000)
Volume (m
3
/hr x 1000)
Static Pressure (Pa x 100)
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
0 10 20 30 40 50
0
2
4
6
8
10
12
14
16
0 5 10 15 20 25 30
0
1
2
3
4
5
6
7
445 445
509 509
561 561
642 642
761 761
871 871
959 959
1097 1097
1163 1163
20 20
15 15
10 10
7½ 7½
5 5
3 3
2 2
1½ 1½
1 1
SWB-333
RPM
HP
Density 0.075 lb/ft
3
SWB-333