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Air Hose Friction
| Hose Size (inches) | CFM thru 50' Hose | Gauge Pressure - Pounds/sq inch | |||
| 50 | 70 | 90 | 110 | ||
| PSI Loss Over 50' Hose Length | |||||
| 1/2" | 20 | 1.8 | 1.0 | .8 | .6 |
| 30 | 5.0 | 3.4 | 2.4 | 2.0 | |
| 40 | 10.1 | 7.0 | 5.4 | 4.3 | |
| 50 | 18.1 | 12.4 | 9.5 | 7.6 | |
| 60 | + | 20.0 | 14.8 | 12.0 | |
| 70 | + | 28.4 | 22.0 | 17.6 | |
| 80 | + | + | 30.5 | 24.6 | |
| 90 | + | + | 41.0 | 33.3 | |
| 10 | + | + | + | 44.5 | |
| 110 | + | + | + | + | |
| 3/4" | 20 | 04 | .2 | .2 | .1 |
| 30 | .08 | .5 | .4 | .3 | |
| 40 | 1.5 | .9 | .7 | .5 | |
| 50 | 2.4 | 1.5 | 1.1 | .9 | |
| 60 | 3.5 | 2.3 | 1.6 | 1.3 | |
| 70 | 4.4 | 3.2 | 2.3 | 1.8 | |
| 80 | 6.5 | 4.2 | 3.1 | 2.4 | |
| 90 | 8.5 | 5.5 | 4.0 | 3.1 | |
| 100 | 11.4 | 7.0 | 5.0 | 3.9 | |
| 110 | 14.2 | 8.8 | 6.2 | 4.9 | |
| 120 | + | 11.0 | 7.5 | 5.9 | |
| 130 | + | + | 9.0 | 7.1 | |
| 1" | 20 | .1 | 0 | 0 | 0 |
| 30 | .2 | .1 | .1 | .1 | |
| 40 | .3 | .2 | .2 | .2 | |
| 50 | .5 | .4 | .3 | .2 | |
| 60 | .8 | .5 | .4 | .3 | |
| 70 | 1.1 | .7 | .6 | .4 | |
| 80 | 1.5 | 1.0 | .7 | .6 | |
| 90 | 2.0 | 1.3 | .9 | .7 | |
| 100 | 2.6 | 1.6 | 1.2 | .9 | |
| 110 | 3.5 | 2.0 | 1.4 | 1.1 | |
| 120 | 4.8 | 2.5 | 1.7 | 1.3 | |
| 130 | 7.0 | 3.1 | 2.0 | 1.5 | |
PSI = pressure in pounds/square inch
CFM = air flow in cubic feet/minute
+ pressure loss is too great and therefore the combination of
Hose Size, CFM, and Gauge Pressure is not recommended. Gauge
Pressures the indicated air pressure in pounds/square inch, at thesource (i.e. the air compressor receiver tank)