GMNA - GMN8423
Low Permeating Seals for Fuel Applications
|Publication Date:||1 May 2018|
This specification describes the requirements of low permeating fluorocarbon elastomer seals with good resistance to fuel and fuel/alcohol blends.
Material Description. To fully describe the material,a type mustfollowthespecifi
Type I - Fluorocarbon Elastomer (FKM containing 67 wt%Fluorine) with-20°Clowtemperat
Type II - Fluorocarbon Elastomer (FKM containing 70 wt%Fluorine) with-5°Clowtemperatu
Typical Application. Fuel sender seal.
Remarks. In addition to the test requirements listed in this specification, additional testing may be required for validation of the seal used in the sender closure MRA. Satisfactory completion of those validation tests,as definedby the GM Materials Engineer, must be demonstrated prior to approval to this specification.