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Aerospace
High-Heat And-Fuel Resistant Aircraft Engine Seals
Kalrez® O-rings and seals combine the chemical and thermal stability of a fluoropolymer with the seal resilience of an elastomer.
DuPont™ Kalrez® perfluoroelastomer parts began being selected broadly for aircraft engine seals with the commercialization of Kalrez® 4079AMS to meet AMS 7257 specification in the 1980s.
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Data Sheets Kalrez AeroSeal 7797 Data Sheet |
Now, DuPont continues to develop its product offering, developing more elastomers and formulations that have been demonstrated to provide exceptional performance within aerospace and aircraft engine applications.
The properties of Kalrez® parts have helped provide time tested reliability for aerospace seals and O-rings, which must withstand high temperatures, corrosive fuels and lubricating oils. The durability of Kalrez® aerospace seals can help minimize unscheduled downtime, for longer meantime between repair, and reduce overall operating costs.
Proven Durability
Kalrez® seals are formulated to provide exceptional performance in aerospace and aircraft engine applications. Kalrez® AeroSealTM7777 and 7797 parts were successfully tested for over 8000 hours by a major equipment maker, putting parts in contact with high thermo-oxidative stability lubricants. Both products exhibit excellent High Thermo-oxidative Stability (HTS) resistance. With a maximum continuous service temperature of 325º C (617º F), Kalrez® AeroSeal™ 7777 and 7797 demonstrated low compression set, improved stress relaxation and improved temperature cycling performance.
The latest product for aircraft and aerospace engines is Kalrez® AeroSeal™ 7800 parts. The parts provide ultra-low titanium corrosion and low compression set. Kalrez® 7800 parts meet AMS 7257D.
Engineered for Aerospace Applications 
Kalrez® parts are engineered with properties that withstand aggressive aerospace fluids, including jet fuels, engine lubricating oils, hydraulic fluids, rocket propellants and oxidizers. They exhibit excellent sealing performance and mechanical properties for both static and dynamic applications.
Features
Standard Kalrez® O-Ring Compounds
Kalrez® Compounds – 4079
4079 perfluoroelastomer parts are a black, low compression set product for use in many dry and wet semiconductor process environments. It has excellent chemical resistance, good mechanical properties and outstanding thermal stability.
Kalrez® Compounds – 6375
6375 is designed to give outstanding performance in the widest possible range of chemicals and temperatures. This product is an excellent choice for use in acids, bases, amines, steam, ethylene oxide, and many other aggressive chemicals.
Kalrez® Compounds – 7075
7075 is designed for general-purpose use as O-rings or custom sealing components in the chemical and hydrocarbon processing industries. It is a carbon black-filled compound with mechanical properties designed for improved sealing performance in temperature cycling applications. 7075 has improved thermal resistance that extends maximum service temperature to 327 °C (620 F).
Kalrez® Compounds – 0090
0090 perfluoroelastomer parts deliver durable, reliable sealing solutions for applications requiring excellent rapid gas decompression (RGD) properties as well as high hardness and high modulus properties. Some application areas include downhole equipment such as drilling and completion tools as well as industrial equipment including pumps and valves.
Specialty Kalrez® O-Ring Compounds
Kalrez® Spectrum™ – 7375
Kalrez® Compounds -6380
6380 is a non-black product specifically developed for chemical processes involving hot, aggressive amines. It has also been successfully used in applications involving highly oxidizing chemicals. In addition, it has excellent overall chemical resistance. This cream colored product is easily identifiable when selecting an O-ring material for harsh chemical plant services.
Kalrez® Compounds -7090
7090 is a product for uses requiring higher hardness/higher modulus than more typical applications. Kalrez® 7090 perfluoroelastomer parts are well suited for both static and dynamic applications as well as specific sealing applications requiring extrusion resistance at high temperatures.
Kalrez® Compounds -0040
0040 -is a black product specifically designed for low temperature environments where significant chemical resistance is required. Kalrez® 0040 parts maintain elasticity and seal force at temperatures unattainable by other perfluoroelastomers.
Kalrez® Compound – W240
Kalrez® is a registered trademark of E.I. du Pont de Nemours and Company or its affiliates
