Page 20 - Catalog4400.pdf

SEO Version

Before you spec it, STAMP it.
Outer Cover
Reinforcement
Inner Tube
I.D.
SIZE
TEMPERATURE APPLICATION
MEDIA
PRESSURE
S T A M P
When you order hose
and fttings from Parker,
remember the word “STAMP.”
That way you won’t forget
important information!
Size
Parker uses a system of measure-
ment called Dash Numbers to
indicate hose and ftting size. The
dash number, or dash size, is the
measure of a hose’s Inner Diameter
(I.D.) in sixteenths of an inch. (The
exception to this is SAE 100R5
hose. See the chart below for
complete details.)
This measuring system of the inside
diameter of the hose is universally
used by the fuid power industry
today. Don’t know the hose size?
Check the layline. If the original
printing has worn off, the original
hose must be cut and the inside
diameter measured. Be sure to
measure the overall assembly
length and ftting orientation
before cutting the hose.
The hose I.D. must be sized
accurately to obtain the proper
fow velocity. A fow that’s too slow
results in sluggish system perfor-
mance, while a fow that’s too high
causes excessive pressure drops,
system damage, and leaks.
Use the
Flow Capacity Nomogram
in
Section E
to determine the proper
hose I.D. for an application’s fow
rate requirements.
Hose I.D. (Inches)
All Except Transportation
Transportation
and Refrigerant Hoses
and Refrigerant Hoses
Dash No.
Inches
Millimeters
Inches
Millimeters
-3
3/16
5
–
–
-4
1/4
6,3
3/16
5
-5
5/16
8
1/4
6,3
-6
3/8
10
5/16
8
-8
1/2
12,5
13/32
10
-10
5/8
16
1/2
12,5
-12
3/4
19
5/8
16
-16
1
25
7/8
22
-20
1-1/4
31,5
1-1/8
29
-24
1-1/2
38
1-3/8
35
-32
2
51
1-13/16
46
-40
2-1/2
63
2-3/8
60
-48
–
–
3
76
The hose size is determined by
the inside diameter which can be
measured or found on the layline.
20