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Rulon Bearings

DuPont Mobility and Materials Kalrez® AeroSeal™ 7797 Fluoroelastomer  (discontinued **)
Categories: Polymer; Thermoset; Fluoropolymer, TS; Thermoset Fluoroelastomer; Rubber or Thermoset Elastomer (TSE)

Material Notes: DuPont™ Kalrez AeroSeal™ 7797 perfluoroelastomer parts are a specialty black product specifically targeted for use in applications requiring high hardness/higher modulus properties. It offers outstanding thermal stability and compression set resistance and has excellent seal force retention properties. It also offers excellent resistance to HTS (High Thermo-Oxidative Stability) gas turbine engine lubricating oils and has excellent response to temperature cycling effects. Kalrez AeroSeal™ 7797 has excellent mechanical properties and is well suited for both static and dynamic sealing applications. A maximum continuous service temperature of 325 C (617 F) is suggested. Short excursions to higher temperatures may also be possible.

Performance Features/Benefits

  • Outstanding thermal stability
  • Outstanding compression set resistance
  • Excellent seal force retention properties
  • Excellent resistance to high thermo-oxidative stability (HTS) gas turbine engine lubricating oils
  • Excellent response to temperature cycling effects
  • Excellent mechanical properties
  • Lower coefficient of thermal expansion (CTE) versus other Kalrez® products thus minimizing the need to increase the free volume of the seal gland when upgrading from fluoroelastomers (FKM) to perfluoroelastomers (FFKM).

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Mechanical PropertiesMetricEnglishComments
Hardness, Shore A 9090ASTM D2240
Tensile Strength at Break 23.84 MPa3458 psiASTM D1414, ASTM D412
Elongation at Break 77 %77 %ASTM D1414, ASTM D412
50% Modulus 15.91 MPa
@Strain 50 %
15.91 MPa
@Strain 50 %
ASTM D1414, ASTM D412
Compression Set 11 %
@Temperature 204 °C,
Time 252000 sec
11 %
@Temperature 399 °F,
Time 70.0 hour
ASTM D1414 and ASTM D395B
 
Thermal PropertiesMetricEnglishComments
Maximum Service Temperature, Air 325 °C617 °FDuPont Test Method
Minimum Service Temperature, Air -5.00 °C23.0 °FRetraction Temperature, Tr10; ASTM D1329
 
Descriptive Properties
ColorBlack

**
Materials flagged as discontinued () are no longer part of the manufacturer’s standard product line according to our latest information. These materials may be available by special order, in distribution inventory, or reinstated as an active product. Data sheets from materials that are no longer available remain in MatWeb to assist users in finding replacement materials.

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Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's terms of use regarding this information. Click here to view all the property values for this datasheet as they were originally entered into MatWeb.

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