The corrected air flow capacity, which considers the user’soperating conditions, is required for selecting air
dryer. Select using the following procedures.
IDF Selection Example IDU Selection Example
Read the correction
factors.
Obtain the correction factors A to
D suitable for your operating
condition from the table on the
next page.
2
Calculate the corrected
air flow capacity.
Obtain the corrected air flow
capacity from the following formula.
Corrected air flow capacity =
Air flow rate V(Correction
factor A x B x C x D)
Corrected air flow capacity = 0.3 m3/min V(0.82 x
0.96 x 1 x 0.88) = 0.43 m3/min
Corrected air flow capacity = 0.4 m3/min V(0.95 x
0.93 x 1 x 0.88) = 0.51 m3/min
4
Select the model.
Select the model with air flow capacity
which exceeds the corrected air flow
capacity from the specification table.
(For air flow capacity, refer to the data
E on page 4.)
According to the corrected air flow capacity of 0.43
m3/min, the
IDF4E
will be selected which air flow
capacity is 0.52 m3/min at 50 Hz.
According to the corrected air flow capacity of 0.51
m3/min, the
IDU4E
will be selected which air flow
capacity is 0.57 m3/min at 60 Hz.
5
Options Refer to pages 21 through to 25. Refer to pages 21 through to 25.
Refer to pages 5, 9 and 12.
Refer to pages 26 through to 36.
Refer to pages 15 and 18.
6
Finalize the model
number.
7
Select the optional
accessories.
8
Check the coefficient. Correction factor = 0.82 x 0.96 x 1 x 0.88 = 0.69
Max. coefficient value is 1.5 Correction factor is 1.5
when the calculation result is 1.5 or greater.
Correction factor = 0.95 x 0.93 x 1 x 0.88 = 0.78
Max. coefficient value is 1.5 Correction factor is 1.5
when the calculation result is 1.5 or greater.
3
Select the IDF or IDU. Select the IDF or IDU from inlet air temperature used.
• Inlet air temperature 41 to 122°F (5 to 50°C) ····· IDF
• Inlet air temperature 122 to 176°F (50 to 80°C) ····· IDU
1
Data
symbol
104 F (40°C)
95 F (35°C)
50 F (10°C)
72.5psi (0.5 MPa)
0.3 m3/min
50 Hz
A
B
C
D
—
—
0.82
0.96
1
0.88
—
—
Inlet air temperature
Ambient temperature
Outlet air pressure dew point
Inlet air pressure
Air flow rate
Power supply frequency
Condition
Note) Values obtained from “Correction Factors” on page 4.
Data
symbol
104 F (60°C)
95 F (35°C)
50 F (10°C)
72.5psi (0.5 MPa)
0.4 m3/min
60 Hz
A
B
C
D
—
—
0.95
0.93
1
0.88
—
—
Inlet air temperature
Ambient temperature
Outlet air pressure dew point
Inlet air pressure
Air flow rate
Power supply frequency
Condition
Note) Values obtained from “Correction Factors” on page 4.
Series IDF/IDU
Model Selection
Correction
factor
Note)
Correction
factor
Note)
3
