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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.
SWB-340 - 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 = 1709 lb. (777 kg)
All dimensions in inches (millimeters)
For additional discharge positions see page 13
^Weight shown includes largest cataloged Open Drip Proof motor and weatherhood
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)
Maximum BHP at a given RPM = (RPM/321)
3
(Maximum KW at a given RPM = (RPM/354)
3
)
Maximum RPM = 936
Tip Speed (ft/min.) = RPM x 10.54
(Tip Speed (m/s) = RPM x 0.0535)
Maximum Motor Frame Size = 286T
CFM OV
Static Pressure in Inches wg
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
12500 1342
RPM 391 460 521 575 625 671
BHP 1.80 2.85 3.92 5.06 6.29 7.56
Sones / LwiA 10.3 / 71 12.4 / 74 13.9 / 76 15.6 / 78 17.3 / 80 19.4 / 81
14250 1530
RPM 428 488 547 599 646 691 733
BHP 2.32 3.51 4.70 5.93 7.22 8.61 10.0
Sones / LwiA 12.6 / 74 14.8 / 76 15.8 / 78 17.4 / 79 19 / 81 20 / 82 22 / 83
16000 1718
RPM 466 521 575 625 670 712 754 793 829
BHP 2.95 4.25 5.60 6.95 8.34 9.76 11.3 12.9 14.5
Sones / LwiA 15.2 / 77 16.7 / 78 17.8 / 80 19.4 / 81 21 / 83 22 / 84 23 / 84 24 / 85 26 / 86
17750 1906
RPM 506 555 603 652 697 738 776 813 850 885
BHP 3.72 5.12 6.63 8.10 9.60 11.1 12.7 14.4 16.1 17.9
Sones / LwiA 18.1 / 79 18.5 / 80 19.9 / 81 22 / 83 23 / 84 24 / 85 25 / 86 26 / 86 27 / 87 29 / 88
19500 2094
RPM 547 592 636 680 724 764 802 837 871 905
BHP 4.63 6.14 7.75 9.40 11.0 12.7 14.4 16.1 17.8 19.7
Sones / LwiA 19.9 / 82 21 / 82 22 / 83 24 / 85 25 / 85 26 / 86 27 / 87 28 / 88 29 / 88 31 / 89
21250 2282
RPM 589 629 670 710 751 791 828 863 896 928
BHP 5.70 7.31 9.02 10.8 12.6 14.4 16.2 18.0 19.9 21.8
Sones / LwiA 23 / 84 24 / 85 25 / 86 26 / 86 27 / 87 28 / 87 29 / 88 31 / 89 32 / 89 33 / 90
23000 2470
RPM 631 668 706 744 780 818 855 889 922
BHP 6.94 8.65 10.5 12.4 14.3 16.3 18.2 20.1 22.1
Sones / LwiA 26 / 86 27 / 87 28 / 87 29 / 88 30 / 88 31 / 89 32 / 89 33 / 90 34 / 91
24750 2658
RPM 673 708 743 778 813 846 882 917
BHP 8.37 10.2 12.1 14.1 16.2 18.3 20.4 22.4
Sones / LwiA 29 / 88 30 / 88 30 / 89 31 / 89 32 / 90 33 / 90 35 / 91 36 / 91
26500 2846
RPM 716 749 781 814 847 879 910
BHP 9.98 11.9 14.0 16.1 18.2 20.5 22.7
Sones / LwiA 32 / 90 33 / 90 33 / 90 34 / 91 35 / 91 36 / 92 38 / 92
28250 3034
RPM 758 790 819 851 881 912
BHP 11.8 13.9 16.0 18.2 20.5 22.8
Sones / LwiA 35 / 91 36 / 91 36 / 92 37 / 92 39 / 92 40 / 93
30000 3222
RPM 801 832 860 889 918
BHP 13.8 16.1 18.3 20.6 23.0
Sones / LwiA 38 / 93 39 / 93 40 / 93 41 / 93 42 / 94
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 60
0
2
4
6
8
10
12
14
16
0 5 10 15 20 25 30 35 40
0
1
2
3
4
5
6
7
404 404
463 463
549 549
628 628
692 692
792 792
871 871
936 936
25 25
20 20
15 15
10 10
7½ 7½
5 5
3 3
2 2
SWB-340
RPM
HP
Density 0.075 lb/ft
3
SWB-340