Page 10 - Catalog4400.pdf

NEW Standard
International ISO Standard – many
of our new hoses are designed to
the recently released ISO 18752
specifcation. This specifcation
allows for the performance of
the hose to dictate the grading it
receives. Parker knows how tough
hose applications can be, and we
built our newest spiral hoses to
withstand the toughest requirements
ISO 18752 has to offer... and more.
Parker hosemeets evolving industry specifcations.
Legacy
SAE hoses – pressure varies by size ( R9, R10, R11, R12 )
Newer
SAE hoses ( R13, R15, R17, R19 ) are constant pressure
Future
ISO standard 18752
– Hose spec established in 2006
– Constant working pressure class hoses
– Differentiated performance levels
– Industry trend toward ISO specs
ISO 18752 Performance Defnitions (Section 4.2 Grades and Types)
Hoses are classifed according to their resistance to impulse into four grades: A, B, C and D. Each grade is
classifed by outside diameter into standard types (AS, BS and CS) and compact types (AC, BC, CC and DC),
as shown in the table below.
AS
AC
BS
BC
CS
CC
Grades and Types
Resistance to Impulse
Grade Type a Temperature Impulse Pressure Minimum Number of Cycles
ºC (% of MWP b)
A 100 133% 200,000
B 100 133% 500,000
C 120 133% and 120%c 500,000
D DC 120 133% 1,000,000
a Standard or compact, e.g. CS is grade C and standard type.
Standard types have larger outside diameters and larger bend radii and compact
types have smaller outside diameters and smaller bend radii.
b Maximum working pressure.
c 120% of the MWP shall be used for classes 350, 420 and 560 instead of 133%.
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