Page 64 - FluoropolymerHoseCatalog5162F

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WARNING
Keep fngers and hands away
from die-pusher area. Failure
to do so may result in personal
injury.
Selection of Hose Diameter from Flow Rate and Velocity
cu. ft./min. = .1337 Q
The cu. ft. per min. value is the actual
volume fow rate under fowing
conditions.
For air, standard cfm of free air = 7.81
actual cfm when the inlet air is at 100
PSIg, 68°F.
HOSE DIAMETER/FLOW RATE/VELOCITY GUIDE
The Fluid Velocity Nomogram gives the velocity of a liquid or gas as a function of fow rate and inside diameter
of the fuid line. The commonly recommended maximum velocities for hydraulic oil systems at 200°F or less
are indicated for guidance.
Example: At 10 gpm, what is the minimum size within the recommended velocity range for a hydraulic pressure line?
The dashed line drawn from the 10 gpm mark on the left hand line to the maximum velocity of 20 fps
intersects the mid­dle line at .438 " (7/16" I. D. hose or tubing).
For a hose application, use 1/2" I. D., the nearest common standard size.
This chart is based on the following formulas: vfps = .321Q , Q = gal per min
þd2 d = hose or tube I. D. (inch)
4
Technical