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Krytox™ 240AC Grease
Krytox™ 240AC is an NLGI 2, nonflammable, aerospace-grade PFPE grease with a PTFE thickener. Its base oil viscosity of 270 cSt at 38°C meets MIL-PRF-27617 Type III.
Chemours Krytox™ 240AC is a white, buttery grease that is nonreactive, nonflammable, safe in chemical and oxygen service, and extremely long lasting. This highly engineered perfluoropolyether-based lubricant is designed primarily for aerospace and aviation applications where consistent, reliable performance under aggressive environments is critical.
Krytox™ 240AC Grease is formulated from a high-purity PFPE base oil and proprietary additives that allow for protection and lubrication from −100°F to 750°F (−73°C to 399°C).
Krytox™ 240AC Grease meets the strict performance requirements under military specification PRF-27617 Types I, II, and III. Krytox™ 240AC also provides NSF approval for incidental food contact under H1.
Vapor pressure of base oil: @ 38°C (100°F): 8 x 10 e -8 @ 260°C (500°F): 2 x 10 e -3
Volatility of base oil (wt% loss in 22 hrs): @ 149°C (300°F): 0 @ 204°C (400°F): <1 @ 260°C (500°F): 4
Pour point of base oil: −35°C (−30°F) Texture: Buttery NLGI Grade: 2 Grease density at 25°C (77°F): 1.93 g/mL Military specification (MIL-SPEC): MIL-PRF-27617 NATO number: G-398 Change in worked penetration: +3 Corrosion on copper (2b max): 1b
Mechanical stability (ASTM D217, 10,000 and 100,000 strokes): No change Oxidation stability @ 99°C (210°F): 0 psig pressure drop after 600 hrs
Liquid oxygen impact (ASTM D2512, NASA MSFC 106B): Pass Oil separation (wt% loss in 30 hrs): @ 99°C (210°F): 3 @ 204°C (400°F): 11
Estimated useful range: −34°C to 288°C (−30°F to 550°F) Qualification reference number: AFPET/PTP 08-012
High-temperature bearing performance (500 hrs, min at 10,000 rpm, 204°C): Stopped at 1,320 hrs
Evaporation % (ASTM D2595): 10.1 Solubility in fuel (%): 0.3 Water washout characteristics (%): 0.25
Dirt count: 75 microns and larger: 0 25–75 microns: 0
Resistance to aqueous solution: Distilled water: Pass 50/50 Distilled water/ethanol: Pass Film stability and corrosion on steel: Pass
Primary Chemistry: PFPE
Features & Benefits
Chemically inert Broad-temperature performance Low outgassing Nonflammable High-temperature grease Meets the following specifications: MIL-PRF-27617 Type III NATO# G-399 NSF H1 food grade Synthetic PFPE base oil
Chemical or oxygen reactivity with conventional lubricants Short grease operational life or inferior protection Lubricant flammability concerns with aviation grease
Applications
Krytox™ 240AC Grease is a highly engineered lubricant solution that can be used successfully across a wide range of applications, including but not limited to the following: Aerospace and aviation equipment Bearings Gears Seals, gaskets, and O-rings Gauges Valves Quick connectors Oxygen systems
Chemours Krytox™ lubricants are compatible with all metals, elastomers, plastics, paints, and finishes.
Krytox™ Specialty Aerospace Performance Lubricants are PFPE based oils & greases that meet or exceed the strict requirements of the Aerospace, Aviation & National Defense industries.
Krytox™ Performance Lubricants provide exceptional performance for o-ring lubrication and protection. Explore their portfolio of tailored products here.
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ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
Thank you
Thank you for your inquiry and interest in ChemPoint. We will respond to you shortly.
ChemPoint will not under any circumstances release personal user information to individuals or companies. All information collection is solely used to support ChemPoint customers service communications. Read our Privacy Notice.
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