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| AEROSHELL FLUID 31 詳細(xì)說(shuō)明 （瀏覽1208次） |
AEROSHELL FLUID 31
AeroShell Fluid 31 is a synthetic hydrocarbon based aircraft hydraulic fluid
with greatly improved fire resistance characteristics when compared with
conventional petroleum products.
AeroShell Fluid 31 has a specially designed base stock which imparts a
relatively high flash point, excellent low temperature properties and good
oxidation and thermal stability. In addition, AeroShell Fluid 31 is formulated
with high technology additives to provide oxidation and corrosion
resistance, antiwear, and anti-foaming protection.
AeroShell Fluid 31 is superclean filtered to ensure optimum performance in
particulate monitored systems.
AeroShell Fluid 31 is dyed red.
The useful operating temperature range is –40 to +205°C.
APPLICATIONS
AeroShell Fluid 31 is recommended for use in aircraft, ordnance, and
missile systems operating from –40°C to +205°C . This fluid should be
considered for use in auto pilots, shock absorbers, brakes, flight control
systems, hydraulic servo-controlled systems and other systems using
synthetic elastomer seals.
An increasing number of aircraft manufacturers now recommend use of this
type of fluid in aircraft hydraulic systems in preference to mineral hydraulic
oils. This move has been prompted by need to use fluids with better fire
resistant properties.
AeroShell Fluid 31 is also approved for use in the Honeywell (formerly
Garrett) cooling turbine (cabin air compressors).
Increasingly this type of hydraulic fluid is being adopted for use in
hydraulic systems of military aircraft in place of mineral hydraulic fluids.
AeroShell Fluid 31 is a synthetic hydrocarbon oil and should not be used in
contact with incompatible seal materials. Refer to the General Notes at the
front of this section for further information.
AeroShell Fluid 31 is compatible with AeroShell Fluids 4, 41, 51, 61 and
71 and can be used in systems designed to operate with MIL-PRF-5606,
MIL-PRF-6083, MIL-PRF-87257 and MIL-PRF-46170 fluids.
Chlorinated solvents should not be used for cleaning hydraulic components
which use AeroShell Fluid 31. The residual solvent contaminates the
hydraulic fluid and may lead to corrosion.
www.shell.com/aviation
190
Hydraulic Fluids
SPECIFICATIONS
U.S. Approved MIL-PRF-83282D
British (MIL-PRF-83282D)
French Equivalent to DCSEA 437/A
Russian –
NATO Code H-537
Joint Service Designation OX-19
PROPERTIES MIL-PRF-83282D TYPICAL
Oil type Synthetic Synthetic
Hydrocarbon Hydrocarbon
Kinematic viscosity mm
2
/s
@ 205°C 1.0 min 1.07
@ 100°C 3.45 min 3.53
@ 40°C 14.0 min 14.33
@ –40°C 2200 max 2098
Flashpoint
Cleveland Open Cup °C 205 min 237
Fire Point °C 245 min 251
Total Acidity mgKOH/g 0.10 max 0.01
Evaporation loss 6.5 hrs
@150°C % m 20 max 10
Relative density @ 15.6/15.6°C Report 0.850
Pourpoint °C –55 max Below –55
Table continuedNOTES
The AeroShell Book
Edition 18 2003
193
Hydraulic Fluids
www.shell.com/aviation
192
Hydraulic Fluids
PROPERTIES MIL-PRF-83282D TYPICAL
Low temperature stability
72 hrs @ ?40°C Must pass Passes
High temperature stability
100 hrs @ 205°C Must pass Passes
Gravimetric Filtration, mg/100ml 0.3 max 0.2
Filtration time minutes 15 max Less than 15
Particle Count, Automatic, per Lt
5 to 15 μm 10000 max 1331
16 to 25 μm 1000 max 190
26 to 50 μm 150 max 55
51 to 100 μm 20 max 4
>100 μm 5 max 0
Water content ppm 100 max 82
Foam resistance ASTM Seq 1 Must pass Passes
Flame propagation cm/s Must pass Passes
Rubber swell, NBR-L % 18 to 30 Passes
4-Ball Wear, 1 hr @ 75°C
scar dia, mm
1 kg load/1200 rpm 0.21 max 0.18
10 kg load/1200 rpm 0.30 max 0.24
40 kg load/1200 rpm 0.65 max 0.50
Oxidation & corrosion stability
168 hrs @ 121°C
– metal weight change Must pass Passes
– viscosity change @ 40°C % 10 max Less than 10
– change in acidity mgKOH/g 0.2 max Less than 0.02
Flammability Must pass Passes
A viscosity/temperature curve is shown at the end of this section. |
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