Page 368 - Catalog4400.pdf

E-10 Hose Products Division
Parker Hannifn Corporation
Wickliffe, Ohio
www.parkerhose.com
Technical Catalog 4400 US
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Hose Installation Tips A pplication
wrong right
The routing of the hose assembly and the environ-
ment in which the hose assembly operates directly
infuence the service life of the hose assembly. The
following diagrams indicate the correct routing of
hose assemblies that will maximise its service life
and assure a safe working functionality.
When hose installation is straight, there must be
enough slack in the hose to allow for changes in
length that occur when pressure is applied. When
pressurized, hose that is too short may pull loose
from its hose fttings or stress the hose ftting
connections, causing premature metallic or seal
failures.
The hose length must be determined so that the
hose assembly has enough slack to allow the
system components to move or vibrate without
creating tension in the hose.
However, do not to allow too much slack and
therefore introduce the risk of the hose snagging on
other equipment or rubbing on other components.
Mechanical straining of the hoses needs to be
avoided, so the hose must not be bent below its
minimum bend radius or twisted during installation.
The minimum bending radii for each hose is stated
in the hose tables in the catalogue.
The plane of movement must also be considered
and the hose routing selected accordingly.
Hose routing also plays an important role on the
selection of the hose fttings, as the correct fttings
can avoid straining the hoses, unnecessary hose
length or multiple threaded joints.