advanced technology designed, tested and proved a revolutionary
new high pressure Teflon hose. Using the most modern methods
of wire braiding calculations and hose stress analysis, Aeroquip
engineering developed the AE246 Teflon hose with Hi-Pat braiding.
This single wire braid contains densely packed small diameter
wires braided over a minimum thickness Teflon tube in such
a way that exceptional performance is possible. This hose
exceeds all requirements of MIL-H-38360 and has been tested
successfully at 4000 psi for up to 600,000 cycles at 400°F.
AE246 Hose is now available to the aerospace industry with
Aeroquip’s full recommendation for normal 3000 psi
hydraulic systems and selected 4000 psi hydraulic systems
with impulse peaks up to 5000 psi.
Hose is 40 to 50% lighter in weight than previous high pressure
Teflon hose. It also has a much smaller envelope, is visibly
smaller in diameter, and has excellent flexing and bend radius
characteristics. Aeroquip Teflon hose has low volumetric
expansion, assuring maximum response efficiency in ballistic
election systems, brake systems, etc., where there can be
no softness under shock load. Because the tube is smooth
and homogeneous, it is able to withstand the high velocity,
sudden pressure surges and temperature rises encountered
in these systems.
rate of effusion of gases and resistance to capillary leakage
of fluid through the hose lines is controlled by a patented
extrusion method used to produce Aeroquip Teflon hose liners.
Inherent resiliency and toughness are built into the extruded
tube by close control of factors affecting crystallinity.
The extruded tube has a tough, smooth, wax like texture which
resists erosion. No materials of a sticky or viscous nature
will stick to its surface. It has essentially zero moisture
absorption, and this, together with its chemical inertness
and anti-adhesive characteristics, make it ideal for missile
fluid systems where maintenance of a low dew point is necessary.
life: Service and shelf life of Aeroquip Teflon
hose are unlimited for all practical purposes. However,
experience has shown that service life on impulsing applications
may eventually be limited by fatigue in the wire reinforcement.
Maximum service life on such applications is best determined
by the operator based on experience.
Procedures: AE246 Hose was thoroughly tested to
meet or exceed the requirements of MIL-H 38360A (Amendment
1 for conductive hose). Tests were conducted at 4000 psi
with 5000 psi surge peaks. Two varying levels of vibration
were applied at one end while the other end was flexed
for 300,000 cycles. Then the ends were reversed and the
procedure repeated. Temperatures varied from room temperature
to +4OO°F. The hose was also tested and met the requirements
of all other conditions prescribed in this specification
including aging tests and salt corrosion testing.
Hose has a Teflon tube which is designed to eliminate electrostatically
induced hose failures. The tube is capable of conducting
a direct current equal to or greater than 6 micro-amps in
sizes -4, -6 and -8; while in size -10 and -12 it will conduct
a direct current equal to or greater than 12 micro-amps with
a potential of 1,000 volts. AE246 Hose consists of a thin
wall Teflon inner tube and a Hi-Pat outer braid consisting
of densely packed small diameter stainless steel wires braided
in a uniform pattern.
pressure and high temperature service. Teflon hose is unaffected
by fuels, lube oils, cool-ants or solvents commonly used
in aircraft applications. Superior vibration resistance,
low volumetric expansion and high temperature resistance
makes it ideal for hydraulic systems.
temperatures: -67°F. to +400°F, fluid
High Pressure Teflon Hose with Braided Polyester Chafe
is AE246 with a blue polyester braided chafe guard, which
provides superior chafe resistance and the flexibility of
the hose is not impaired, it adds minimal weight and only
increases the hose OD by 0.100” for all sizes. The
hose is compatible with the fluids: LD4, Highjet Chevron,
Skydrol 500B4, JP-4 (MIL-T-5624), AvGass Grade 100/130 (MIL-C-5572),
MIL-L-7808 Lube Oil, Varsol (Cleaning Solvent).
Temperatures: -65F to +300F
Pressure Teflon Hose with Integral Silicone Fire Sleeve
is AE246 hose with an integral silicone fire protection,
which is applied directly onto the hoses metal braid and
end fittings to form a smooth, tight bond. This hose/fire
protection cover is non-age sensitive for extra-long service
life and does not impair the flexibility of the hose (same
minimum bend radius as AE246) while providing an excellent
meets the fire test requirements of TSO-C53a Type D and TSO-C75
Type III A and III B.
Temperatures: -65F to +450F
Common end fittings available from stock:
Thread type: Flared (MS33656), Flareless
Thread size: -3 to -12
Fitting style: Straight, 45 deg, 90 deg
Other options: Jump Size, Male thread,
Lock wire holes
here to download Eaton's engineering bulletin AA8 (reusable end
here to download Eaton's engineering bulletin TF100-24 (crimp
Click here to download Eaton's engineering bulletin TF100-8A (STC Connectors)
Click here to download Eaton's Catalog TF100-11A (Repairing Silicone Hose)