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SAE AMSR25988 Rev B

Current Revision

Rubber: Fluorosilicone (FVMQ), Engine Oil / Fuel-Resistant, For Seals in Engine Oil Systems/Fuel Systems

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This material has resistance to diester-based engine oil (MIL-PRF-7808) and fuel, but usage is not limited to such applications. This material is not suitable for use in synthetic phosphate ester based hydraulic fluids (AS1241) or helicopter transmission lubricating oils (DOD-PRF-85734, MIL-PRF-32538). For gas turbine engine lubricating oils (AS5780, MIL-PRF-23699), resistance varies by class and should be evaluated individually (see Note regarding high performance oils). This material has a typical service temperature range of -70 to +392 °F (-56.7 to +200 °C) for Class 1 and Class 2 and -70 to +437 °F (-56.7 to +225 °C) for Class 3. The service temperature range of the material is a general temperature range, but the presence of particular fluids and specific design requirements may modify this range. Each application should be considered separately. It is the responsibility of the user to determine that this specification is appropriate for the environments (temperature range, fluids exposure, etc.) in which it is sought to be used.

SDO SAE: SAE International
Document Number AMSR25988
Publication Date June 27, 2023
Language en - English
Page Count 18
Revision Level B
Supercedes
Committee
Publish Date Document Id Type View
June 27, 2023 AMSR25988B Revision
Aug. 4, 2017 AMSR25988A Revision
March 1, 1998 AMSR25988 Revision