Page 23 - Parker Catalog 4400 - Hose, Fittings and Equipment

Metal-to-Hose Abrasion Resistance Comparison Optional Covers

Type Features
450 X
Results from the ISO 6945
Levels of Abrasion Resistance show that Tough Cover and Super Tough (ST) Excellent abrasion resistance.
Super Tough
metal-to-hose abrasion test
(ST) Cover
Tough Cover (TC) Very good abrasion resistance.
Fair resistance to ozone and
cold flexibility.
Super Tough cover hoses offer
significantly greater abrasion
resistance than standard
rubber cover hose.
and cold flexibility.
80 X
Standard
Tough
Rubber Cover Cover (TC) Very good resistance to ozone

Braided vs. spiral hose At one time in the industry,

two-wire braided hose was
Hydraulic hose can be referred
to by construction style, of which most commonly used in many
there are two main types: braided applications. But the advent of
and spiral. The majority of “low- larger, off-road specialty equipment
pressure hoses” have a textile drove the creation of spiral hose,
braided construction. They’re which is very well suited for
commonly used to transmit applications where extremely high
petroleum-based fluids, diesel impulse pressure is encountered.
fuel, hot lubricating oil, air, ethylene
glycol anti-freeze, and water. Today, hydrostatic drives using
four and six-wire spiral hoses
can be found on everything from
“Medium-pressure hoses” typically
feature one- and two-wire braided lawn tractors to earth movers.
construction. These hoses are Because today’s world demands
frequently found on construction faster, more powerful equipment
equipment, heavy-duty trucks, requiring increased working
and fleet vehicle applications. In pressures, Parker is responding
general, braided hose is selected with an expansive offering of spiral
for its flexibility. products.
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