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AMS7272G - Rings, Sealing, Butadiene-Acrylonitrile (Nbr) Rubber Synthetic Lubricant Resistant 67-75

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Document Number: AMS7272G
Project Initiation: 11-21-2006
Project Number:
Revision Number: G
Sponsor Name: Marc E. Gage
Title
Rings, Sealing, Butadiene-Acrylonitrile (Nbr) Rubber Synthetic Lubricant Resistant 67-75
Scope
This specification covers a butadiene-acrylonitrile (NBR) rubber in the form of molded rings. These rings have been used typically as sealing rings in contact with diester synthetic lubricants in service up 150 degrees C (302 degrees F), but usage is not limited to such applications. The cross-section of such rings is usually not over 0.275 inch (6.98 mm) in diameter or thickness.
Rationale
Service Liquid 101 is being replaced by Service Liquid 106 (ARM 200). This revision is intended to update AMS7272 in order to reflect the difference in volume change resulting from the change in test liquids. Acceptance tests have been defined for seal sizes other than those listed in ARP3050. A QPL requirement has been added.
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