Associated Equipment 3HP - Manual (Page 7)

Exhaust Volumes Required for Different Applications ( 1 )
WOODWORKING
Equipment Size
Min. CFM
Required
(2)
Jointer Knife Length = Up to 6" 350
6-r” to 12" 440
■ 12+“ to 20" 550
over 20“ 800
Sander, Belt Belt Width = Up to 6“ 790 (3)
(Horizontal) 6+"to 9" 900 (3)
9+" to 14" 1240 (3)
Sander, Disc Disc Diameter = Up to 12" 350
12+“ to 18" 450
18+'' to 26'' 550
Sander, Drum Drum Surface = Up to 200 350
(in square inches) 201 to 400 550
401 to 700 785
701 to 1400 1100
Saw, Band Blade Width = Up to 2" 700 (3)
2+'' to 3" 900 (3)
3+“ to 4" 1350 (3)
Saw, Radial Hood behind blade = 430
From port on blade guard = 70
Total = 500
Saw, Swing Blade Diameter = Up to 20“ 350
over 20" 440
Saw, Table Blade Diameter = Up to 16" 350
16+“ to 24" 440
over 24" 550
Variety with dado = 550
Planer, Single Knife Length = Up to 20" 785
20+" to 26“ 1100
(1 ) The exhaust volume (CFM) requirements shown are from the
American Conference of Governmental Industrial Hygienists
(ACGIH®), Industrial Ventilation: A Manual of Recommended
Practices, 19th Edition. Copyright 1986. Reprinted with permis­
sion. Consult manual for more detailed recommendations.
Contact them at www.acgih.org
(2) OEM's required are minimums per each equipment type. Duct
velocity should not be less than 3500 FPM to prevent wood
dust from settling in duct work.
METALWORKING
Min. CFM
Equipment Size
Required
(4)
Buffing, Belt Belt Width = Up to 3" 220
3+" to 5" 300
5+" to 7" 390
7+" to 9" 500
9+" to 11" 610
11+" to 13“ 740
Buffing, Wheel Wheel Width = 2" 300
(5) 3" 500
4" 610
5" 740
6" 1040
Grinding Wheel Wheel Width = 1" 220
Wheel speeds (5) 1-1/2" 220
below 6500 sf/m 2" 390
3“ 500
4" 610
5“ 880
6" 1200
Grinding Wheel Wheel Width = 1 “ 220
Wheel speeds (5) 1-1/2" 390
above 6500 st/m 2" 610
, 3" 740
4" 880
5" 1200
Abbreviations used in charts:
CFM = Cubic feet of air per minute
FPM = Feet per minute
sf/m = Surface feet per minute
(3) Requires 2 nozzles or hoods. CFM’s shown are total CFM for
both nozzles or hoods.
(4) For all metalworking applications, duct velocity should be at least
3500 FPM for light grinding or buffing and at least 4500 FPM for
heavy grinding or butting to prevent settling in duct work.
(5) The wheel hood should cover at least 75% of the wheel to be
considered a good enclosure.
How To Select The Proper Size Dust Collector
These dust collectors will give you excellent results in collecting wood
chips, fine dust and metal shavings, they are not designed to work in large
central system applications. These are portable units that can be moved
from machine to machine. To select the proper size Dust Collector, use the
criteria below:
1. Add the “CFM REQUIRED” for each machine per the above chart. This
is your rOMi. CFM REQUIRED.
2. Now, select the Dust Collector model from Page 1 with a "Max. CFM”
greater than your TOTAL CFM REQUIRED in step 1. If none of the
models on Page 1 have a Max. CFM greaterthanyourTOTALCFM
required, you will need more than one unit or a larger “central system”
or you will need to shut off lines (with dampers) so dust oollector is only
pulling from one line at a time (see notes 6 and 7 at right),
3. [f the unit will be in a "fixed installation” all ductwork should be sheet
metal duct Instead of flexible hose. The pressure drop through flexible
hose Is about 2-4 times that of smooth wall pipe. DO NOT use any
PVC or plastic pipe. It can deliver a severe static electric shock
caused by high velocity dust passing through it.
The Dust Coltector should be located as close to the machine as possible
and preferably no more than 10 feet away.
Use as few elbows as possible in your ductwork. The loss through one,
90° elbow is equal to approximately 10 teel of straight, smooth wall pipe.
If the dust collector will be used on more than one machine, you should
install slide gate dampers in the duct at each machine to “close off’ that
section of duct when using another machine. This will allow the dust
collector to pull from only one machine at a time and thus increase the
dust collector performance.
Typicatfy, a 1 VzHP Model will work with up to 20 total feet of duct work, a
model 2HP Model will work with up to 30 total feet of duct work and a
3HP Model will worir with up to 75-85 total feet of duct work. These
values are based on having dampers at each machine connection [as in
note 6 above) and all duct work Is smooth wall, sheet metal.