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Click here for
printable Selection Guide!
Select the RIGHT AirPoweräBlower
for your Application!
Proper
blower selection is highly dependent on
system design and the ultimate
performance objective, be it for
air-knife use, fluidized bed, pond
aeration, or one of many other possible
applications. Vortron is always
available to assist with system
development and application
recommendations. Guidelines specific to
Air-Knife applications are also
available.
 In
all cases, it is the piping and
discharge system characteristic that
determines the blower selection. In
general, the piping system will exhibit
a rising pressure vs. flow rate
characteristic, where
. blowers, on the other hand, exhibit
the opposite characteristic where
pressure will, in general, drop-off with
increasing flow rate. Where the system
and blower curves intersect defines the
operating point for the entire system.
Once the
Performance Requirements are Known…
Selecting
the best AirPower model
for the application is straightforward.
From the chart below, find the system
operating pressure in one of the
left-hand columns, then move over to the
required flow rate, selecting the
operating point "box". This is the
proper AirPower unit for
the application, pre-selected to deliver
best possible efficiency.
|
 |
4.70 |
 |
9.56 |
 |
130 |
|
J70
265 |
J70
253 |
J70
253 |
J70
253 |
J70
253 |
J70
265 |
Z40e
215 |
Z40e
220 |
Z40e
220 |
Z40e
220 |
Z40e
225 |
Z40e
230 |
|
4.34 |
8.83 |
120 |
|
J70
250 |
J70
245 |
J70
240 |
J70
240 |
J70
240 |
J70
245 |
Z40e
210 |
Z40e
210 |
Z40e
210 |
Z40e
215 |
Z40e
220 |
Z40e
220 |
|
3.97 |
8.09 |
110 |
|
J70
240 |
J70
235 |
J70
230 |
J70
230 |
J70
230 |
J70
235 |
Z40e
200 |
Z40e
200 |
Z40e
200 |
Z40e
210 |
Z40e
210 |
Z40e
215 |
|
3.61 |
7.35 |
100 |
X40
250 |
X40
250 |
X40
245 |
X40
240 |
X40
240 |
X40
245 |
Z40e
193 |
Z40e
193 |
Z40e
193 |
Z40e
193 |
Z40e
200 |
Z40e
200 |
Z40e
210 |
|
3.25 |
6.62 |
90 |
X40
235 |
X40
235 |
X40
230 |
X40
230 |
X40
230 |
X40
235 |
Z40e
185 |
Z40e
185 |
Z40e
185 |
Z40e
185 |
Z40e
193 |
Z40e
193 |
Z40e
200 |
|
2.89 |
5.88 |
80 |
X40
220 |
X40
220 |
X40
215 |
X40
215 |
X40
220 |
X40
220 |
Z40e
177 |
Z40e
177 |
Z40e
177 |
Z40e
182 |
Z40e
187 |
Z40e
187 |
Z40e
193 |
|
2.53 |
5.15 |
70 |
X40
210 |
X40
200 |
X40
200 |
X40
210 |
X40
210 |
X40
215 |
Z40e
165 |
Z40e
165 |
Z40e
165 |
Z40e
172 |
Z40e
177 |
Z40e
182 |
Z40e
187 |
|
2.17 |
4.41 |
60 |
X40
200 |
X40
195 |
X40
190 |
X40
190 |
X40
195 |
X40
195 |
Z40e
155 |
Z40e
155 |
Z40e
160 |
Z40e
165 |
Z40e
170 |
Z40e
177 |
Z40e
182 |
|
1.81 |
3.68 |
50 |
X40
190 |
X40
187 |
X40
182 |
X40
182 |
X40
182 |
X40
182 |
Z40e
144 |
Z40e
144 |
Z40e
150 |
Z40e
155 |
Z40e
160 |
Z40e
165 |
Z40e
177 |
|
1.45 |
2.94 |
40 |
X40
175 |
X40
175 |
X40
165 |
X40
165 |
X40
165 |
X40
165 |
Z40e
140 |
Z40e
140 |
Z40e
140 |
Z40e
150 |
Z40e
150 |
Z40e
160 |
Z40e
170 |
|
|
|
|
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
1000 |
1100 |
1200 |
1300 |
|
Flow - SCFM |
|
CHART #1 |
Determine Power Requirements…
The final
step in the selection process is to
determine power required to operate the
system, AT the operating point of
interest. This is highly important as
motor sizing and overall utility
requirements and operational costs will
depend upon the system power. To assist
this assessment, Vortron has tabulated
shaft power requirements to operate
AirPower units. Here, by
selecting the system operating point in
the same fashion as the previous
exercise, actual blower power is readily
obtained:
1. Find
the operating point "box" knowing system
pressure and airflow
2. Read
the blower power (HP) directly
|
|
4.70 |
|
9.56 |
|
130 |
|
6.3 |
8.4 |
10.3 |
12.3 |
14.4 |
16.8 |
19.2 |
21.1 |
23.1 |
25.4 |
27.7 |
30.0 |
|
4.34 |
8.83 |
120 |
5.7 |
7.7 |
9.4 |
11.3 |
13.4 |
15.6 |
17.6 |
19.5 |
21.5 |
23.6 |
25.8 |
27.9 |
|
3.97 |
8.09 |
110 |
5.2 |
7.0 |
8.6 |
10.4 |
12.3 |
14.3 |
16.2 |
17.9 |
19.8 |
21.8 |
23.8 |
25.8 |
|
3.61 |
7.35 |
100 |
2.5 |
4.5 |
6.1 |
7.5 |
9.2 |
11.0 |
13.2 |
14.7 |
16.3 |
18.2 |
20.0 |
21.8 |
23.8 |
|
3.25 |
6.62 |
90 |
2.2 |
4.0 |
5.5 |
6.8 |
8.3 |
10.0 |
11.9 |
13.3 |
14.8 |
16.5 |
18.1 |
19.8 |
21.5 |
|
2.89 |
5.88 |
80 |
1.9 |
3.6 |
4.8 |
6.0 |
7.5 |
9.1 |
10.7 |
11.9 |
13.3 |
14.7 |
16.2 |
17.7 |
19.4 |
|
2.53 |
5.15 |
70 |
1.7 |
3.1 |
4.2 |
5.3 |
6.6 |
8.2 |
9.4 |
10.5 |
11.7 |
13.0 |
14.3 |
15.8 |
17.3 |
|
2.17 |
4.41 |
60 |
1.4 |
2.6 |
3.6 |
4.6 |
5.7 |
7.2 |
8.2 |
9.0 |
10.1 |
11.2 |
12.5 |
13.7 |
15.0 |
|
1.81 |
3.68 |
50 |
1.2 |
2.2 |
3.0 |
3.8 |
4.8 |
6.0 |
7.0 |
7.6 |
8.6 |
9.7 |
10.6 |
11.6 |
12.7 |
|
1.45 |
2.94 |
40 |
1.0 |
1.7 |
2.4 |
3.1 |
4.0 |
5.0 |
5.7 |
6.2 |
7.0 |
7.9 |
8.8 |
9.5 |
10.6 |
|
|
|
|
100 |
200 |
300 |
400 |
500 |
600 |
700 |
800 |
900 |
1000 |
1100 |
1200 |
1300 |
|
Flow - SCFM |
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CHART #2 |
NOTE – Blower power tabulated at
inlet air density of 0.075 lbm/ft3;
inlet temperature of 528°R. All
power readings correspond to the
specific AirPower Model,
performance tested at the operating
point. Units larger than 25 HP are
currently under development.
Note
lastly that all power readings
correspond to the specific
AirPower model, performance
tested at the operating point.
Application Example
An
airknife drying system has been
specified for high performance in-line
drying, with a knife manifold pressure
of approximately 73 in-H2O.
This is to achieve a discharge velocity
of approximately 33,500
feet-per-minute. A quadrant of four
24-inch long knives (96" total) with
0.042" gap is proposed, with a total air
consumption of approximately 925 CFM.
Plant environment inlet air at
approximately 68°F is assumed. Select a
blower for this application.
Solution –
Referring to Chart #1, 70 in-H2O
pressure at 900 CFM indicates a Z40e-165
selection as the initial choice. Chart
#2 indicates the Z40e-165 will be
operating at approximately 12 HP, thus,
a 15 HP motor is selected for this
particular operating point. At 15 HP,
flows up to 1,000 CFM and approaching 80
in-H2O can be achieved.
Therefore, sufficient margin is
available for tuning purposes.
Published by
Process Air Solutions
201 Sun Valley Circle Fenton, MO 63026
Phone 636.343.2021 Email:
sales@processairsolutions.com
ã2005
Process Air Solutions
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