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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.
57
SWB-340-AF - Belt Drive
Series 300
Wheel Diameter = 40
1
⁄4 (1022)
Shaft Diameter = 2
3
⁄16 (56)
Outlet Area = 9.31 ft
2
(0.865 m
2
)
^Approximate Unit Weight = 1579 lb. (718 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/344)
3
(Maximum KW at a given RPM = (RPM/379)
3
)
Maximum RPM = 949
Tip Speed (ft/min.) = RPM x 10.54
(Tip Speed (m/s) = RPM x 0.0535)
Maximum Motor Frame Size = 286T
89
3
⁄16
(2265)
31
7
⁄8 (810)
49
5
⁄16 (1253)
3
1
⁄2
(89)
42
3
⁄16
(1072)
47
(1194)
42
5
⁄8
(1083)
66
13
⁄16
(1697)
71
5
⁄8
(1819)
45
1
⁄2 (1156)
62
1
⁄16 (1576)
66
1
⁄4 (1683)
33
3
⁄8
(848)
31
7
⁄8
(810)
46
(1168)
29
5
⁄8
(752)
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
15000 1611
RPM 480 535 586 632 678 720
BHP 2.44 3.65 4.89 6.20 7.48 8.79
Sones / LwiA 13.3 / 74 14.6 / 76 16 / 77 17.3 / 78 18.5 / 79 18.9 / 80
16500 1772
RPM 518 568 616 660 701 743 782 819
BHP 2.98 4.30 5.63 7.03 8.48 9.88 11.3 12.8
Sones / LwiA 15.6 / 77 16.5 / 78 17.9 / 79 19.3 / 80 19.7 / 81 20 / 81 21 / 82 21 / 83
18000 1933
RPM 557 602 647 689 730 767 806 842 876
BHP 3.60 5.02 6.48 7.95 9.50 11.1 12.6 14.2 15.8
Sones / LwiA 17.6 / 79 18.7 / 80 20 / 81 21 / 82 21 / 82 21 / 82 22 / 83 22 / 84 24 / 85
19500 2094
RPM 597 638 679 720 759 795 830 865 899 931
BHP 4.33 5.83 7.43 8.99 10.6 12.3 14.0 15.7 17.4 19.1
Sones / LwiA 20 / 81 21 / 82 22 / 83 22 / 83 22 / 83 23 / 84 23 / 84 24 / 85 25 / 86 27 / 87
21000 2255
RPM 637 674 714 752 789 824 858 889 923
BHP 5.16 6.75 8.45 10.2 11.9 13.6 15.4 17.3 19.1
Sones / LwiA 23 / 83 24 / 84 23 / 84 23 / 84 24 / 84 24 / 85 25 / 86 26 / 86 27 / 87
22500 2416
RPM 677 712 749 784 820 853 886 918 947
BHP 6.10 7.79 9.58 11.4 13.2 15.1 17.0 18.9 20.9
Sones / LwiA 25 / 85 25 / 85 25 / 85 25 / 85 25 / 86 25 / 86 27 / 87 28 / 88 29 / 89
24000 2577
RPM 717 750 784 818 852 885 916 947
BHP 7.16 8.94 10.8 12.8 14.7 16.7 18.6 20.7
Sones / LwiA 27 / 87 27 / 87 26 / 87 26 / 87 26 / 87 27 / 88 29 / 88 30 / 89
25500 2738
RPM 758 789 820 853 884 916 947
BHP 8.34 10.2 12.2 14.3 16.4 18.4 20.4
Sones / LwiA 28 / 88 28 / 88 28 / 88 28 / 88 29 / 88 30 / 89 31 / 90
27000 2900
RPM 798 829 857 888 919 948
BHP 9.66 11.7 13.7 15.9 18.1 20.3
Sones / LwiA 31 / 90 31 / 90 30 / 90 31 / 90 32 / 90 32 / 90
28500 3061
RPM 839 869 896 924
BHP 11.1 13.2 15.4 17.6
Sones / LwiA 34 / 91 34 / 91 33 / 91 34 / 91
30000 3222
RPM 880 908 935
BHP 12.7 14.9 17.2
Sones / LwiA 37 / 93 37 / 93 37 / 93
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
0 5 10 15 20 25 30 35
0
1
2
3
4
5
6
433 433
496 496
588 588
673 673
741 741
848 848
949 949
25 25
20 20
15 15
10 10
7½ 7½
5 5
3 3
2 2
SWB-340-AF
RPM
HP
Density 0.075 lb/ft
3
SWB-340-AF