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 Pr
essur
e (in. wg)
Volume (cfm X 1000)
Volume (m
3
/hr x 1000)
Static Pr
essur
e (Pa x 100)
D
o
no
t
se
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
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
RPM
HP
Density 0.075 lb/ft
3
SWB-340-AF
