CPB-102 - page 5

3500RPM
OutletArea- .09Ft.
2
Temperature/AltitudeCorrection
Correction factors for temperature (F) andaltitude (above sea level):
standard air = .075 lbs. per cubic foot at sea level, 29.92” barometric pressureand70° F
-40
-15
0
40
70
80
100
120
140
160
180
200
.79
.84
.87
.94
1.00
1.02
1.06
1.09
1.13
1.17
1.21
1.25
.81
.86
.88
.96
1.02
1.04
1.08
1.11
1.15
1.19
1.23
1.27
.82
.87
.90
.96
1.04
1.06
1.10
1.13
1.17
1.21
1.25
1.29
.84
.89
.92
1.00
1.06
1.08
1.12
1.16
1.20
1.24
1.28
1.32
.85
.90
.93
1.01
1.08
1.10
1.14
1.18
1.22
1.26
1.30
1.34
.87
.92
.95
1.03
1.10
1.12
1.16
1.20
1.24
1.28
1.32
1.36
.
88
.94
.97
1.05
1.12
1.14
1.18
1.22
1.26
1.31
1.35
1.39
.90
.95
.99
1.07
1.14
1.16
1.20
1.24
1.29
1.33
1.37
1.42
.92
.97
1.00
1.09
1.16
1.18
1.22
1.27
1.31
1.35
1.40
1.44
.95
1.01
1.04
1.13
1.20
1.22
1.27
1.31
1.36
1.41
1.45
1.50
AIR
TEMP
(F°)
29.92
500´
29.38
1000´
28.86
1500´
28.33
2000´
27.82
2500´
27.31
3000´
26.82
3500´
26.32
4000´
25.84
5000´
24.90
ALTITUDE (feet) withBAROMETRICPRESSURE (HG)
When thepressureblowerwill not behandlingstandardair, corrections
will benecessary.Apply the factors fromthis table.
Example:
Assumea requirement of 900CFMand25" SP tooperateat 140°F
and1500' altitude. Fromthe tablewehavea factor of 1.20. (A)Multi-
ply thepressureby the factor: 25" x1.20=30" SP. (B) Select a fan
for 900CFM. Thegraphson the followingpages indicateaSizeE2
blowerwith6" outlet requiring6.4BHP. (C)Divide theBHPby the fac-
tor: 6.4÷1.20=5.33BHP. Theselectionwould read: SizeE2 for 900
CFM, 25" SP, 140°F, at 1500' altitude, andacorrectedBHPof 5.33.
4"Outlet
BlowerSelection
Refer to Chicago Blower’s
Selectionprogram, fan.net,
forperformance, fancurves
andsounddata.
Contact your localChicago
Blower sales engineer for
software andassistance.
Theperformance curves shownon the follow-
ingpages illustrate theD/53PressureBlowerʼs
operational range. Red curves indicate volume
vs. pressure, theblue curves indicate volume
vs. brakehorsepower. Refer to
fan.net
selec-
tion softwarewhena specific performance
point withgreater detail is required. Operating
range is stableover the entire curve from0
flow (block off) towideopen volume.
SizeA
SizeD
5
Design53PressureBlowerPerformance
1,2,3,4 6,7,8,9,10,11,12
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