Page 27 - Catalog4400.pdf

Braided vs. spiral hose
Hydraulic hose can be referred
to by construction style, of which
there are two main types: braided
and spiral. The majority of “low-
pressure hoses” have a textile
braided construction. They’re
commonly used to transmit
petroleum-based fuids, diesel
fuel, hot lubricating oil, air, ethylene
glycol anti-freeze, and water.
“Medium-pressure hoses” typically
feature one- and two-wire braided
construction. These hoses are
frequently found on construction
equipment, heavy-duty trucks,
and feet vehicle applications. In
general, braided hose is selected
for its fexibility.
At one time in the industry,
two-wire braided hose was
most commonly used in many
applications. But the advent of
larger, off-road specialty equipment
drove the creation of spiral hose,
which is very well suited for
applications where extremely high
impulse pressure is encountered.
Today, hydrostatic drives using
four and six-wire spiral hoses
can be found on everything from
lawn tractors to earth movers.
Because today’s world demands
faster, more powerful equipment
requiring increased working
pressures, Parker is responding
with an expansive offering of spiral
products.
Contact your local Parker
distributor to see the full range of
hose choices, and to discuss their
various applications.
27
Optional Covers
Type Features
Tough Cover (TC) Very good abrasion resistance.
Fair resistance to ozone and
cold flexibility.
Super Tough (ST) Excellent abrasion resistance.
Very good resistance to ozone
and cold flexibility.
80 X
Tough
Cover ( TC)
Standard
Rubber Cover
450 X
Super Tough
(ST ) Cover
Results from the ISO 6945
metal-to-hose abrasion test
show that Tough Cover and
Super Tough cover hoses offer
significantly greater abrasion
resistance than standard
rubber cover hose.
Metal-to-Hose Abrasion Resistance Comparison
Levels of Abrasion Resistance