52
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 Pr
essur
e (in. wg)
Volume (cfm X 1000)
Volume (m
3
/hr x 1000)
Static Pr
essur
e (Pa x 100)
D
o
n
o
t
s
e
le
c
t
to
t
h
e
l
e
ft
o
f
th
is
s
y
s
te
m
c
u
rv
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
7
½
7
½
5 5
3 3
2
2
1½
1½
1
1
RPM
HP
Density 0.075 lb/ft
3
SWB-333
