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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 and LwiA values only.
SWB-330-AF - 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 = 998 lb. (454 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/563)
3
(Maximum KW at a given RPM = (RPM/621)
3
)
Maximum RPM = 1305
Tip Speed (ft/min.) = RPM x 7.85
(Tip Speed (m/s) = RPM x 0.0399)
Maximum Motor Frame Size = 256T
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)
CFM OV
Static Pressure in Inches wg
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
8000 1547
RPM 631 709 779 839 901 957
BHP 1.23 1.91 2.61 3.31 4.05 4.81
Sones / LwiA 11.7 / 75 12.9 / 76 14.2 / 77 15.5 / 79 16.9 / 80 18.4 / 82
8800 1702
RPM 678 752 818 878 933 988 1039
BHP 1.49 2.22 2.98 3.76 4.53 5.34 6.18
Sones / LwiA 13 / 76 14 / 77 15.4 / 79 16.7 / 80 18 / 81 19.6 / 83 21 / 83
9600 1856
RPM 726 795 858 918 970 1020 1071 1119
BHP 1.79 2.58 3.40 4.24 5.08 5.93 6.81 7.72
Sones / LwiA 14.1 / 78 15.3 / 79 16.6 / 80 18 / 81 19.5 / 83 21 / 84 21 / 84 22 / 85
10400 2011
RPM 775 840 900 957 1010 1056 1103 1150 1195 1238
BHP 2.14 2.97 3.85 4.75 5.68 6.57 7.49 8.45 9.43 10.4
Sones / LwiA 15.6 / 79 16.8 / 80 18 / 81 19.5 / 83 21 / 84 21 / 84 22 / 85 23 / 85 24 / 86 25 / 87
11200 2166
RPM 825 886 944 997 1049 1097 1139 1182 1227 1269
BHP 2.53 3.42 4.35 5.32 6.29 7.29 8.25 9.24 10.3 11.3
Sones / LwiA 17.3 / 81 18.5 / 82 19.6 / 83 21 / 84 22 / 85 22 / 85 23 / 86 24 / 86 25 / 87 25 / 87
12000 2321
RPM 875 933 987 1039 1088 1136 1180 1219 1259 1301
BHP 2.97 3.92 4.91 5.92 6.96 8.01 9.08 10.1 11.2 12.3
Sones / LwiA 19.2 / 82 20 / 83 22 / 84 22 / 85 23 / 85 23 / 86 24 / 86 25 / 87 25 / 87 26 / 88
12800 2475
RPM 925 980 1033 1082 1129 1175 1219 1260 1297
BHP 3.46 4.48 5.51 6.58 7.68 8.79 9.92 11.1 12.2
Sones / LwiA 21 / 84 23 / 85 23 / 86 23 / 86 24 / 86 24 / 86 25 / 87 26 / 87 27 / 88
13600 2630
RPM 976 1028 1079 1126 1172 1215 1258 1299
BHP 4.02 5.09 6.18 7.31 8.46 9.64 10.8 12.0
Sones / LwiA 24 / 86 24 / 86 24 / 86 24 / 86 25 / 87 25 / 87 26 / 88 27 / 88
14400 2785
RPM 1027 1077 1125 1171 1215 1257 1298
BHP 4.64 5.76 6.92 8.09 9.30 10.5 11.8
Sones / LwiA 26 / 87 26 / 87 26 / 87 26 / 87 26 / 87 27 / 88 27 / 88
15200 2940
RPM 1079 1127 1172 1217 1259 1300
BHP 5.32 6.50 7.72 8.95 10.2 11.5
Sones / LwiA 27 / 88 27 / 88 27 / 88 27 / 88 27 / 88 28 / 89
16000 3094
RPM 1131 1176 1220 1263 1303
BHP 6.07 7.31 8.59 9.87 11.2
Sones / LwiA 28 / 89 28 / 89 28 / 89 29 / 89 29 / 89
Static Pressure (in. wg)
Volume (cfm X 1000)
Volume (m
3
/hr x 1000)
Static Pressure (Pa x 100)
RPM
HP
Density 0.075 lb/ft
3
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
0
2
4
6
8
10
12
14
0 5 10 15 20 25
0
1
2
3
4
5
6
15 15
10 10
7½ 7½
5 5
3 3
2 2
1½ 1½
1 1
¾ ¾
512 512
563 563
644 644
709 709
812 812
963 963
1102 1102
1213 1213
1305 1305
SWB-330-AF
SWB-330-AF