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 and LwiA values only.
53
SWB-333-AF - 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 = 1166 lb.
(530 kg)
All dimensions in inches
(millimeters)
For additional discharge positions see page 13
^Weight shown includes largest cataloged Open Drip Proof motor and weatherhood
Maximum BHP at a given RPM = (RPM/482)
3
(Maximum KW at a given RPM = (RPM/531)
3
)
Maximum RPM = 1186
Tip Speed (ft/min.) = RPM x 8.64
(Tip Speed (m/s) = RPM x 0.0439)
Maximum Motor Frame Size = 256T
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)
CFM
OV
Static Pressure in Inches wg
0.5
1
1.5
2
2.5
3
3.5
4
4.5
5
9000
1437
RPM
541
613
679
742
801
BHP
1.25
2.01
2.79
3.61
4.42
Sones / LwiA 12.3 / 75
14.1 / 77
16.3 / 79
19.4 / 81
21 / 82
10000 1597
RPM
584
652
714
772
828
881
BHP
1.52
2.36
3.21
4.09
5.01
5.91
Sones / LwiA 14.3 / 77
16.1 / 79
17.7 / 80
20 / 82
24 / 83
25 / 85
11000 1757
RPM
628
692
751
805
858
909
956
1003
BHP
1.84
2.75
3.67
4.62
5.61
6.62
7.63
8.55
Sones / LwiA 16.5 / 79
17.8 / 81
19.2 / 82
21 / 83
25 / 84
31 / 86
31 / 87
31 / 89
12000 1916
RPM
674
734
789
841
890
938
985
1029
1072
BHP
2.21
3.20
4.19
5.21
6.25
7.33
8.44
9.58
10.6
Sones / LwiA 18.9 / 82
19.4 / 82
21 / 83
22 / 84
25 / 85
31 / 87
39 / 89
38 / 90
36 / 90
13000 2076
RPM
719
776
829
878
925
969
1015
1058
1099
1139
BHP
2.65
3.69
4.77
5.86
6.96
8.10
9.27
10.5
11.7
12.8
Sones / LwiA
21 / 83
21 / 83
22 / 84
24 / 85
26 / 87
31 / 88
37 / 89
43 / 91
43 / 91
42 / 92
14000 2236
RPM
766
820
870
916
962
1005
1046
1088
1128
1167
BHP
3.14
4.23
5.41
6.56
7.74
8.94
10.2
11.4
12.7
14.0
Sones / LwiA
22 / 84
23 / 85
24 / 86
26 / 87
28 / 88
31 / 89
35 / 90
41 / 91
46 / 92
50 / 93
15000 2396
RPM
812
864
911
957
999
1041
1081
1119
1158
BHP
3.70
4.84
6.09
7.33
8.59
9.85
11.1
12.5
13.8
Sones / LwiA
24 / 86
25 / 86
26 / 87
27 / 88
30 / 89
32 / 90
34 / 91
39 / 92
44 / 93
16000 2555
RPM
859
909
954
997
1039
1078
1117
1154
BHP
4.33
5.52
6.83
8.17
9.49
10.8
12.2
13.6
Sones / LwiA
26 / 87
27 / 88
28 / 88
29 / 89
31 / 90
33 / 91
36 / 91
39 / 92
17000 2715
RPM
907
954
998
1039
1079
1117
1154
BHP
5.03
6.28
7.65
9.08
10.5
11.9
13.3
Sones / LwiA
28 / 88
29 / 89
30 / 90
31 / 90
33 / 91
35 / 91
37 / 92
18000 2875
RPM
954
1000
1042
1082
1120
1157
BHP
5.82
7.13
8.54
10.0
11.6
13.0
Sones / LwiA
30 / 90
31 / 90
32 / 91
33 / 91
34 / 92
36 / 92
19000 3035
RPM
1002
1046
1086
1125
1161
BHP
6.67
8.07
9.51
11.1
12.7
Sones / LwiA
32 / 91
33 / 91
34 / 92
36 / 92
37 / 93
Static Pr
essur
e (in. wg)
Volume (cfm X 1000)
Volume (m
3
/hr x 1000)
Static Pr
essur
e (Pa x 100)
0
10
20
30
40
0
2
4
6
8
10
12
14
0
5
10
15
20
25
0
1
2
3
4
5
6
552
552
607
607
695
695
824
824
943
943
1038
1038
1186
1186
20
20
15
15
10
10
7½
7½
5 5
3 3
2
2
1½
1½
RPM
HP
Density 0.075 lb/ft
3
D
o
no
t
se
le
c
t
to
t
h
e
l
e
ft
o
f
th
is
s
y
s
te
m
c
u
rv
e
SWB-333-AF
