MH INDUSTRIAL EXHAUST FANS - Aerovent

Wheel Design
BW – Back Plate Radial Wheel
An open back plate radial blade wheel that is ideally suited
for most air and material handling applications. This wheel is
furnished with an inlet rim on heavy-duty units. Consult factory
for special wheel construction on heavy-duty applications
requiring a clog-free wheel. Available to size 63".
OW – Open Wheel
The open type wheel is recommended for applications handling
heavy, granular, or abrasive materials. Air performance is less
than that of the back plate design. Reinforcing rims are added
to size 44" and larger in heavy-duty units.
AW – Air Wheel
The air wheel is designed for maximum efficiency when
handling air, fumes, gases, or light concentrations of fine
particulate matter. Eight slightly backwardly inclined blades
allow for more efficient airflow into the fan.
Table 1. WR 2 Factors (Lb.-Ft 2 )
BW WHEEL OW WHEEL AW WHEEL
SIZE STD. HEAVY STD. HEAVY STD. HEAVY
DUTY DUTY DUTY DUTY DUTY DUTY
12 1.3 2.4 0.9 1.3 1.9 2.0
14 2.0 3.7 1.4 2.0 3.0 3.2
16 3.2 6.0 2.0 3.0 5.1 5.5
18 6.8 10.5 3.6 5.9 9.0 9.5
20 10.3 16 5.1 8.4 16 17
22 18 31 12.3 15 20 22
25 28 50 19 26 32 37
28 56 80 28 40 54 61
32 93 137 48 63 97 111
35 146 297 92 128 167 192
39 226 475 139 216 283 340
44 515 739 225 628 475 561
49 810 1168 342 1009 873 1018
55 1262 1822 512 1539 1343 1565
63 2197 3161 917 2934 2339 2715
71 — — 1535 4700 3856 4467
79 — — 2192 6790 5848 6760
Bearings and Drives
Heavy-duty ball and spherical roller bearings are used on all
arrangements, and are oversized to insure max-imum bearing
life. The belts and sheaves on the belt-driven arrangements
are manufactured by Browning, and are selected to provide
additional allowances of 1.3 to 2 times the normal satisfactory
capacity.
Motors
All motors are in NEMA type foot-mounted frames. Motor
types available include totally-enclosed, cooled, totallyenclosed
explosion-proof, or open-type drip-proof (with or
without special insulations as required).
3 Aerovent Bulletin 705