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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.
58
SWB-344 - Belt Drive
Series 300
Wheel Diameter = 44
1
⁄2 (1130)
Shaft Diameter = 2
7
⁄16 (62)
Outlet Area = 11.39 ft
2
(1.06 m
2
)
^Approximate Unit Weight = 2127 lb. (967 kg)
All dimensions in inches (millimeters)
For additional discharge positions see page 13
^Weight shown includes largest cataloged Open Drip Proof motor and weatherhood
98
5
⁄8
(2505)
36
3
⁄4 (933)
53
7
⁄8 (1368)
3
1
⁄2
(89)
46
5
⁄8
(1184)
52
(1321)
47
1
⁄8
(1197)
73
3
⁄8
(1864)
78
7
⁄8
(2003)
50 (1270)
70
5
⁄16 (1786)
75 (1905)
38
3
⁄16
(970)
35
1
⁄4
(895)
50
1
⁄2
(1283)
32
5
⁄16
(821)
4
11
⁄16
(119)
Maximum BHP at a given RPM = (RPM/271)
3
(Maximum KW at a given RPM = (RPM/299)
3
)
Maximum RPM = 847
Tip Speed (ft/min.) = RPM x 11.65
(Tip Speed (m/s) = RPM x 0.0592)
Maximum Motor Frame Size = 324T
CFM OV
Static Pressure in Inches wg
0.5 1 1.5 2 2.5 3 3.5 4 4.5 5
15000 1316
RPM 350 413 468 517 563
BHP 2.12 3.38 4.67 6.06 7.55
Sones / LwiA 10.7 / 72 12.5 / 74 14.6 / 76 16.6 / 78 17.7 / 80
17000 1492
RPM 381 436 490 537 580 621 660
BHP 2.70 4.12 5.54 7.02 8.60 10.3 12.0
Sones / LwiA 12.7 / 74 14.6 / 76 16.9 / 78 17.7 / 80 19.2 / 81 21 / 83 23 / 84
19000 1668
RPM 413 463 513 559 600 639 677 712 745
BHP 3.39 4.95 6.54 8.15 9.81 11.6 13.4 15.3 17.2
Sones / LwiA 14.9 / 76 17.1 / 78 18.7 / 80 19.4 / 81 21 / 82 23 / 84 24 / 85 25 / 86 27 / 87
21000 1843
RPM 446 492 537 582 622 659 694 730 763 794
BHP 4.23 5.89 7.67 9.42 11.2 13.1 14.9 17.0 19.0 21.1
Sones / LwiA 17.6 / 79 20 / 80 20 / 81 21 / 83 23 / 84 25 / 85 26 / 86 27 / 87 28 / 88 29 / 88
23000 2019
RPM 481 522 563 605 645 682 716 748 780 811
BHP 5.21 6.99 8.91 10.9 12.8 14.7 16.7 18.8 21.0 23.2
Sones / LwiA 21 / 81 22 / 82 22 / 83 24 / 84 25 / 86 27 / 87 28 / 87 29 / 88 30 / 88 31 / 89
25000 2194
RPM 516 554 592 629 668 704 738 770 800 829
BHP 6.35 8.26 10.3 12.4 14.5 16.6 18.7 20.9 23.1 25.4
Sones / LwiA 23 / 83 23 / 84 24 / 85 26 / 86 28 / 87 29 / 88 30 / 88 31 / 89 32 / 89 33 / 90
27000 2370
RPM 551 585 621 657 692 727 761 792 822
BHP 7.67 9.69 11.9 14.1 16.4 18.6 20.9 23.2 25.6
Sones / LwiA 25 / 85 26 / 86 27 / 87 29 / 88 30 / 88 31 / 89 32 / 89 33 / 90 34 / 91
29000 2546
RPM 586 619 652 685 718 751 784 815 844
BHP 9.18 11.3 13.6 16.0 18.4 20.9 23.3 25.7 28.2
Sones / LwiA 28 / 87 29 / 88 30 / 88 31 / 89 32 / 89 33 / 90 34 / 91 35 / 91 37 / 92
31000 2721
RPM 622 653 684 715 746 775 807 838
BHP 10.9 13.2 15.6 18.0 20.6 23.3 25.9 28.4
Sones / LwiA 31 / 89 32 / 90 33 / 90 34 / 90 35 / 91 36 / 91 37 / 92 38 / 92
33000 2897
RPM 658 688 716 746 775 804 831
BHP 12.8 15.2 17.7 20.4 23.0 25.8 28.7
Sones / LwiA 35 / 91 36 / 91 36 / 91 37 / 92 38 / 92 39 / 92 40 / 93
35000 3072
RPM 695 723 749 777 804 832
BHP 15.0 17.5 20.1 22.9 25.7 28.6
Sones / LwiA 38 / 92 38 / 92 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 70 80
0
2
4
6
8
10
12
14
16
0 10 20 30 40 50
0
1
2
3
4
5
6
7
391 391
463 463
530 530
584 584
668 668
736 736
792 792
847 847
30 30
25 25
20 20
15 15
10 10
7½ 7½
5 5
3 3
SWB-344
RPM
HP
Density 0.075 lb/ft
3
SWB-344