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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.
50
SWB-330 - Belt Drive
Series 300
Wheel Diameter = 30 (762)
Shaft Diameter = 1
15
⁄16 (49)
Outlet Area = 5.17 ft
2
(0.480 m
2
)
^Approximate Unit Weight = 1088 lb. (495 kg)
All dimensions in inches (millimeters)
For additional discharge positions see page 13
^Weight shown includes largest cataloged Open Drip Proof motor and weatherhood
68
1
⁄4
(1734)
31
7
⁄8 (810)
38
1
⁄2 (978)
3
1
⁄2
(89)
31
5
⁄8
(803)
36
5
⁄8
(930)
31
13
⁄16
(808)
50
3
⁄4
(1289)
55
7
⁄8
(1419)
35
3
⁄4 (908)
54 (1372)
58
3
⁄16 (1478)
33
3
⁄8
(848)
23
13
⁄16
(605)
35
1
⁄4
(895)
23
1
⁄8
(587)
4
3
⁄16
(106)
Maximum BHP at a given RPM = (RPM/527)
3
(Maximum KW at a given RPM = (RPM/581)
3
)
Maximum RPM = 1279
Tip Speed (ft/min.) = RPM x 7.85
(Tip Speed (m/s) = RPM x 0.0399)
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
7000 1353
RPM 531 630 709 782 849 911
BHP 1.02 1.62 2.25 2.93 3.65 4.39
Sones / LwiA 12.7 / 76 13.8 / 77 15.3 / 79 16.7 / 80 18.5 / 82 20 / 84
8000 1547
RPM 580 671 748 816 879 940 997 1050
BHP 1.31 2.00 2.69 3.42 4.19 5.00 5.83 6.69
Sones / LwiA 13.9 / 77 15 / 79 16.3 / 80 17.6 / 81 19.1 / 82 21 / 84 23 / 86 25 / 87
9000 1740
RPM 631 713 789 854 914 970 1026 1079 1128 1175
BHP 1.67 2.43 3.21 4.00 4.82 5.68 6.58 7.50 8.44 9.40
Sones / LwiA 15.1 / 79 16 / 80 17.5 / 81 18.7 / 82 19.9 / 83 21 / 84 23 / 86 25 /87 27 / 88 29 / 90
10000 1934
RPM 686 755 831 894 953 1007 1057 1109 1158 1204
BHP 2.12 2.93 3.80 4.66 5.54 6.46 7.39 8.38 9.39 10.4
Sones / LwiA 16.7 / 80 17.4 / 81 18.7 / 82 19.9 / 83 21 / 84 23 / 85 24 / 86 26 / 87 27 / 89 29 / 90
11000 2127
RPM 742 804 872 936 993 1045 1095 1142 1188 1234
BHP 2.65 3.51 4.45 5.40 6.35 7.32 8.33 9.35 10.4 11.5
Sones / LwiA 18.4 / 82 19 / 82 19.9 / 83 21 / 84 23 / 85 24 / 86 25 / 87 27 / 88 28 / 89 30 / 90
12000 2321
RPM 799 855 914 978 1034 1085 1134 1180 1224 1266
BHP 3.28 4.18 5.19 6.23 7.26 8.30 9.36 10.5 11.6 12.7
Sones / LwiA 20 / 83 21 / 84 21 / 84 23 / 85 24 / 86 26 / 87 27 / 88 29 / 89 30 / 90 32 / 91
13000 2514
RPM 857 906 961 1019 1076 1127 1174 1219 1262
BHP 4.00 4.95 6.02 7.13 8.27 9.38 10.5 11.6 12.8
Sones / LwiA 22 / 85 23 / 85 24 / 86 25 / 86 26 / 88 28 / 88 29 / 89 31 / 90 33 / 91
14000 2707
RPM 915 962 1011 1061 1117 1169 1215 1259
BHP 4.84 5.85 6.96 8.13 9.35 10.6 11.8 13.0
Sones / LwiA 25 / 86 25 / 87 26 / 87 27 / 88 28 / 89 30 / 90 32 / 91 34 / 92
15000 2901
RPM 974 1018 1062 1109 1159 1210 1257
BHP 5.79 6.87 8.01 9.25 10.5 11.8 13.1
Sones / LwiA 27 / 88 28 / 88 28 / 89 30 / 89 31 / 90 33 / 91 35 / 92
16000 3094
RPM 1033 1075 1114 1159 1202 1252
BHP 6.86 8.02 9.19 10.5 11.8 13.2
Sones / LwiA 30 / 90 31 / 90 32 / 91 33 / 91 34 / 92 36 / 93
17000 3288
RPM 1093 1132 1170 1210 1252
BHP 8.07 9.31 10.5 11.9 13.3
Sones / LwiA 33 / 91 34 / 92 35 / 92 37 / 93 39 / 94
D
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e
c
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o
t
h
e
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e
f
t
o
f
t
h
i
s
s
y
s
t
e
m
c
u
r
v
e
0 5 10 15 20 25 30 35 40
0
2
4
6
8
10
12
14
16
0 5 10 15 20 25
0
1
2
3
4
5
6
7
Static Pressure (in. wg)
Volume (cfm X 1000)
SWB-330
Volume (m
3
/hr x 1000)
Static Pressure (Pa x 100)
RPM
HP
Density 0.075 lb/ft
3
527 527
603 603
664 664
760 760
901 901
1032 1032
1135 1135
1279 1279
15 15
10 10
7
½
7½
5 5
3 3
2 2
1
½
1½
1 1
¾ ¾
479 479
SWB-330