Hose
A
Tubing
B
Coiled Air Hose
&
Fittings
C
Transportation
D
Fittings
E
Tooling, Equipment
&
Accessories
F
Parker Hannifin Corporation
| Parflex
®
Division | Ravenna, Ohio |
parker.com/pfd
For detailed ordering information, please consult price list or contact Parflex
®
Division.
General Technical
G
C-5
Size Selection Procedure
Proper size selection is extremely important in choosing any air hose in order to prevent “starvation” of the air
tool and to ensure maximum torque and tool speed. Starved tools don’t produce!
Steps in size selection:
1.
Determine air flow rate and pressure required by following air-tool manufacturers recommendations.
2.
Refer to “Air Flow Characteristics” graphs, shown below. Find air flow requirement in standard cubic feet
per minute (SCFM) on vertical line to left of graph. Now follow horizontal line on same graph to determine total
extended length of hose required. Follow vertical line above hose length to intersection with the horizontal air
flow SCFM line.
3.
Note pressure drop above curve nearest to intersection of SCFM and hose length lines. Pressure drop,
subtracted from line pressure, equals “available pressure” at the selected SCFM flow rate and hose length.
4.
If “available pressure” is below the tool manufacturers’ recommendations, refer to chart for successively
larger hose sizes until an acceptable “available pressure” is found. Choose this size Fast-Stor
®
Air Hose for
your application.
5.
Refer to “working pressure vs. temperature” chart
(pg. B-7)
to be sure your application falls within the
working range of Fast-Stor
®
Air Hose.
10 20 30 40 50 60 70 80 90 100
2
4
6
8
10
12
14
16
18
20
Feet of Tubing
Air Flow (SCFM)
3/16”
4
20
60
10
40
10 20 30 40 50 60 70 80 90 100
20
30
40
50
60
70
80
90
100
110
Feet of Tubing
Air Flow (SCFM)
3/8”
4
20
60
10
40
1/4”
4
20
60
10
40
10 20 30 40 50 60 70 80 90 100
Feet of Tubing
Air Flow (SCFM)
5
10
15
20
25
35
40
45
50
30
10 20 30 40 50 60 70 80 90 100
10
20
30
40
50
60
70
80
90
100
Feet of Tubing
Air Flow (SCFM)
1/2”
4
20
60
10
40
3/4”
4
20
60
10
40
10 20 30 40 50 60 70 80 90 100
Feet of Tubing
25
50
75
100
125
175
200
225
250
Air Flow (SCFM)
150
Actual working pressure charts are
located in the tubing section on the
specific product page.