Krytox™ GPL 105 Grease
Krytox™ GPL 105 oil is a clear, colorless, fluorinated synthetic oil that is nonreactive, non-flammable, safe in chemical and oxygen service and is long lasting. Krytox™ is a PFPE— also called perfluoroalkylether (PFAE) or perfluoropolyalkylether (PFPAE)— with the following chemical structure:
The polymer chain is completely saturated and contains only carbon, oxygen, and fluorine. On a weight basis, a typical Krytox™ oil contains 21.6% carbon, 9.4% oxygen, and 69.0% fluorine.
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- NSF H-1 Rated
- Fill Fluid
- Injection Molding
One of the greatest advantages of using Krytox GPL 105 oil is stability in a wide variety of operating conditions and environments. This inert nature is what allows Krytox oils and greases to outlast and outperform competing hydrocarbon products.
Standard Krytox lubricants contain only carbon, oxygen, and fluorine; whereas, hydrocarbons contain hydrogen. The absence of hydrogen greatly increases the stability of the lubricants and renders them non-flammable with no flash point. They will not burn or support combustion, even in an environment of 100% liquid or gaseous oxygen.
Krytox GPL 105 Oil is not only resistant to oxygen, but they are also inert to virtually all chemicals used in a variety of industries. They are insoluble in most solvents but are soluble in highly fluorinated fluids and some super critical fluids, such as CO2.
At elevated temperatures and pressures, PFPE oils are highly resistant to attack by gaseous and liquid oxygen. As a result, Krytox oils and greases have become preferred lubricants in the oxygen manufacturing industry and in those industries that use oxygen.
Krytox lubricants do not react with gaseous oxygen under shock loading or with liquid oxygen (LOX), nitrogen tetroxide, or inhibited red fuming nitric acid in impact tests. LOX impact tests were conducted in accordance with ASTM D2512. Other impact tests conducted at 214 J/cm2 (200 ft·lb/in2), according to the method described in ASTM Bulletin 250, also showed no reaction. Krytox lubricants have also been evaluated and certified by the BAM Federal Institute for Materials Research and Testing in Germany for reactivity with gaseous and liquid oxygen under pressure. Table 4, “Oxygen Compatibility of Krytox™ Lubricants,” shows oxygen compatibility of Krytox lubricants.
Krytox GPL 100 oil is remarkably stable to radiation when compared with many materials used as lubricants or power fluids. Irradiation of Krytox lubricants causes minor depolymerization, with a consequent reduction in viscosity and formation of volatile products, but not solids or sludge. In one test exposure of a Krytox sample to an electron bombardment of 107 rad at ambient temperature in air resulted in a viscosity decrease of only 8%. The irradiated sample contained no sludge and was unchanged in appearance.