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1.00

1.04

1.20

1.27

1.38

1.50

1.61

1.72

1.84

1.95

2.18

2.40

2.52

2.63

2.86

Square

Housing

The PBI fan is also

available in the

square housing

pioneered by

Chicago Blower.

Housings have

welded air-tight

seams with all

edges flanged for

exceptional rigidity,

thereby allowing the

fan to be installed in any of

four discharge positions.

Outlet Damper

Outlet dampers are often selected as a low cost option

for varying the airflow. Dampers have punched flanges

on both ends to simplify fan and duct connections.

Opposed acting blades are standard with parallel

blades available.

Chicago Blower Corporation certifies

that the Design 64 PBI Fans shown

herein are licensed to bear the AMCA

Seal. The ratings shown are based on

tests and procedures performed in ac-

cordance with AMCA Publication 211 and

comply with the requirements of the

AMCA Certified Ratings Program.

Square Housing

with AMCA Type

C Construction.

Alternate Widths

To reach more precise performance requirements,

alternate widths from 100% to 40% are readily

available. For other widths consult the factory.

Inlet/Outlet Screens

Welded steel screen mounts entirely within the inlet

cone. Outlet screens are of expanded metal design

and bolted to the outlet flange.

Access Door

A flush mounted rectangular access door is available for

quick inspection and clean-out of material build-up. The

door features quick opening tension clamps with

neoprene gasket.

Drain

PBI fans can be furnished with a half coupling drain and

plug to facilitate convenient and easy power washing.

Spark Resistant Construction

For spark resistant construction, AMCA Type C consists

of aluminum inlet cone and buffer between wheel

backplate and housing. AMCA Type B construction is

also available.

TEMPERATURE AND ALTITUDE CORRECTION

Correction factors for temperature (F) and altitude (above sea level):

standard air = .075 lbs. per cubic foot at sea level, 29.92” barometric pressure and 70° F

-15

0

70

100

150

200

250

300

350

400

500

600

650

700

800

.79

.87

1.00

1.06

1.15

1.25

1.34

1.43

1.53

1.62

1.81

2.00

2.09

2.19

2.38

.81

.88

1.02

1.08

1.17

1.27

1.36

1.46

1.56

1.65

1.84

2.04

2.13

2.23

2.42

.82

.90

1.04

1.10

1.19

1.29

1.39

1.49

1.58

1.68

1.88

2.07

2.17

2.27

2.48

.84

.92

1.06

1.12

1.22

1.32

1.41

1.51

1.61

1.71

1.91

2.11

2.21

2.31

2.51

.85

.93

1.08

1.14

1.24

1.34

1.44

1.54

1.64

1.75

1.95

2.15

2.25

2.35

2.56

.87

.95

1.10

1.16

1.26

1.36

1.47

1.57

1.67

1.78

1.98

2.19

2.29

2.40

2.60

.

88

.97

1.12

1.18

1.28

1.39

1.49

1.60

1.70

1.81

2.02

2.23

2.34

2.44

2.65

.90

.99

1.14

1.20

1.31

1.42

1.52

1.63

1.74

1.84

2.06

2.27

2.38

2.49

2.70

.96

1.00

1.16

1.22

1.33

1.44

1.55

1.66

1.77

1.88

2.10

2.32

2.43

2.53

2.75

AIR

TEMP

(F°)

0

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) with BAROMETRIC PRESSURE (HG)

Page 5 contains multi-rating tables for De-

sign 64 PBI fans. Each section provides

data for a particular motor speed. Under

each pressure (SP) rating, the Volume

(CFM) and horsepower (BHP) is listed for

each fan size. For pressures not provided

in the tables, simply interpolate between

two given pressures.

Example:

5000 CFM, 150°F,

1000' elevation, 5"SP

1. From the Correction Table, the

correction factor for 150°F and 1000'

elevation is 1.19. (Round to 1.20 for

easy conversion.)

2. The equivalent SP at 70°F and sea

level equals 5" SP X 1.20 = 6" SP.

3. Enter the table at 6" SP. You would

select a Size 150 PBI at 3500 RPM for

5086 CFM, requiring 7.86 BHP

4. To correct the BHP to 150°F and 1000'

elevation, divide by the same correction

factor. 7.86/1.20 = 6.55 BHP.

Available Options

4

Fan Selection