Krytox™ 240AC Aerospace Grease
Aviation grease meeting the requirements of MIL-PRF-27617 type III (NATO number G-399) for aircraft and devices, resistant to fuel and oxidants.
Krytox™ 240AC is a white grease that is non-reactive, non-flammable, safe in chemical and oxygen environments and extremely durable. Meets MIL-PRF-27617 type I, II and III standards.
Application
- bearings,
- gears,
- seals,
- o-rings,
- manometers,
- valves,
- gaskets and quick couplers
- oil tank mounting bracket for Trent 1000 engine.
- Connectors, valves, regulators and gaskets for oxygen installations
- Liquid propellant rocket engines and ground systems support
- Instruments, gyroscopes and gimbals
- Seals, valves and pneumatics
- Lead and ball screws
- Electromechanical actuators
- Spline clutches of the engine's auxiliary gearbox
- Anti-friction bearings, engine oil tanks
- Non-conductive grease for sealing electrical installations of connectors
- IR sensors and optics
Features and benefits
- Chemically inert
- Operation over a wide temperature range
- Low gassing
- Incombustible
- Non-toxic, chemically inert and non-evaporating
- Unaffected lubricity and viscosity over a wide temperature range: -34°C to 288°C
- Stable physical properties over time, including radiation resistance
- Virtually insensitive to harsh environmental conditions and harsh chemicals
- Resistant to vapor loss in vacuum (e.g. during high-altitude orbit or spaceflight)
- Long wear and low energy consumption due to excellent friction reducing properties
- Compatible with most metals, elastomers, plastics, paints and finishes
- Meets the following specifications:
MIL-PRF-27617 Type III
NATO#G-399
NSF H-1 Food Grade -
- National Stock Numbers (NSN):
9150-01-008-0495
9150-00-961-8995
9150-01-543-2899
9150-12-307-2645
9150-12-338-4838
9150-99-784-3607
9150-12-349-5329
9150-00-083-5589
91 50-00-726-3553
ASTM D-3336 test result
Bearing operation without exceeding set motor overloads and overtorque set point or above temperature limits .
Used Krytox Grease from the Aerospace series
Krytox 240AC product specification
- Viscosity (cSt):
@ 38°C (100°F): 270
- Base oil vapor pressure:
@ 38°C (100°F): 8 x 10 e -8
- Base oil volatility (wt% loss in 22 hours):
@ 149°C (300°F): 0
@ 204°C (400°F): <1
- Base Oil Pour Point: -35°C (-30°F) )
- Texture: buttery
- NLGI Grade: 2
- Mechanical stability (ASTM D217 10,000 and 100,000 blows): no change
- Oxidative stability at 99°C (210°F): 0 psig pressure drop after 600 hours.
- Impact of liquid oxygen (ASTM D2512, NASA MSFC 106B): pass
- Grease density (at 25°C/77°F): 1.93g/mL
- Oil separation (weight % loss in 30 hours):
@ 99°C (210°F): 3
@ 204°C (400°F): 11
- Estimated usable range: -34°C to 288°C (-30°F to 550°F)
- Qualification Reference: AFPET/PTP 08-012
- MIL-Spec: MIL-PRF-27617 Tyler 2
- NATO number: G-399
- Working Penetration Change: +3
- Copper corrosion (max. 2b): 1b
- High temperature Bearing performance (min. 500 hrs @ 10,000 rpm, 204°C): Stop after 1320 hrs.
- % evaporation (ASTM D-2595): 10.1
- Solubility in fuel (%): 0.3
- Water leaching characteristic (%): 0.25
- Number of impurities:
75 microns and larger: 0
25-75 Micron:0
- Resistance to aqueous solutions:
Distilled water: Complies
50/50 Distilled Water/Ethanol: Positive
- Layer stability and corrosion on steel: Positive
- Primary chemistry: PFPE
Typical parameters of Krytox Aerospace Grease
Property | ASTM Test method | Test Conditions | Unit | Krytox Aerospace grade of aviation grease | ||||
Grease class | 240AZ (H-1) | 240AA | 240AB | 240AC (H-1) | 240AD | |||
(H-1) | ||||||||
Extreme pressure EP additives | 250AZ | — | — | 250AC | 250AD | |||
Corrosion inhibitor additives | — | — | 280AB | 280AC | — | |||
Anti-corrosion additives | 283AZ | 283AA | 283AB | 283AC | 283AD | |||
Base oil viscosity | ASTM D445 | 20 °C | cSt | 60 | 88 | 240 | 800 | 1540 |
38 °C | 24.7 |
35 | 86 | 270 | 502 | |||
99 °C | 4.2 |
5.4 |
10.5 |
26 | 44 | |||
204 °C | 1.08 |
1.3 |
2.1 |
4.1 |
6.0 | |||
Base oil vapor pressure | Knudsen | 38 °C | torr | 4 x 10-4 | 1 x 10 -4 | 5 x 10 -6 | 8 x 10 -8 | 6 x 10 -9 |
260 °C | torr | 1.5 |
0.8 | 3 x 10 -2 | 2 x 10 -3 | 3 x 10-4 | ||
Base oil volatility | ASTM D2595 | 149 °C | wt% loss | 18 | 15 | 1.9 |
— | — |
204 °C | in 22 hrs | — | — | 17.3 |
<1 | - 2 | ||
260 °C | — | — | 76.2 | 4 | ||||
Base oil pour point | ASTM D97 | °C | -55 | -50 | -40 | -35 | -thirty | |
Texture, appearance | buttery | |||||||
Penetration | ASTM D217 | 60 strokes | 265–295 | |||||
Mechanical stability | ASTM D217 | 10,000 and | No change from original rating | |||||
100,000 Strokes | ||||||||
Oxidation stability | ASTM D942 | 99°C (210°F) | 0 psig O 2 pressure drop at 600 hrs. | |||||
Liquid oxygen blast | ASTM D2512, NASA MSFC 106B | pass | ||||||
Grease density | 25 °C | g/mL | 1.89 |
1.91 |
1.92 |
1.93 |
1.93 |
|
Oil separation | ASTM D6184 | 99 °C | wt% loss in 30 hrs | 6 | 5 | 4 | 3 | 3 |
204 °C | — | 20 | 12 | 11 | 10 | |||
Operating temperature range | °C | -57 +149 | -51 +177 | -40 +232 | -34 +288 | -29 +316 |
Storage and durability
Due to the inert, non-oxidizing nature of the ingredients, Krytox™ greases and oils have an indefinite shelf life if left unopened and stored in a clean, dry place.
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19,99 zl PLN | 24,99 zl PLN
Product title
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19,99 zl PLN | 24,99 zl PLN
Product title
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19,99 zl PLN | 24,99 zl PLN
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