Page 225 - Parker Parflex Thermoplastic & Fluoropolymer Products Hose, Tubing, & Fittings 2017 - Cat 4460

Hose
Size Selection Procedure A

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 Tubing
extended length of hose required. Follow vertical line above hose length to intersection with the horizontal air B
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. Coiled Air Hose
5. Refer to “working pressure vs. temperature” chart (pg. B-11) to be sure your application falls within the & Fittings
working range of Fast-Stor Air Hose. C
®

20 50 110
18 45 100
16 40 90 Transportation
14
35
80
Air Flow (SCFM) 12 8 Air Flow (SCFM) 30 Air Flow (SCFM) 70 D
10
25
60
50
20
4 6 15 40
10
30
2 5 20
10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100
Feet of Tubing Feet of Tubing Feet of Tubing Fittings
3/16" 4 20 60 1/4" 4 20 60 3/8" 4 20 60
10 40 10 40 10 40 E
100 250
90 225
80 200
175
70
Air Flow (SCFM) 60 Air Flow (SCFM) 150 Actual working pressure charts are Tooling, Equipment & Accessories
located in the tubing section on the
125
50
specific product page.
100
40
30
50
20 75 F
10 25
10 20 30 40 50 60 70 80 90 100 10 20 30 40 50 60 70 80 90 100
Feet of Tubing Feet of Tubing
1/2" 4 20 60 3/4" 4 20 60
General Technical
10 40 10 40

For detailed ordering information, please consult price list or contact Parflex Division. G
Parker Hannifin Corporation | Parflex Division | Ravenna, Ohio | parker.com/pfd C-5