INCH-POUND
A-A-52485B
July 11, 2013
SUPERSEDING
A-A-52485A
April 6, 1995
COMMERCIAL ITEM DESCRIPTION
VALVE, RELAY EMERGENCY: BREAKAWAY AIR BRAKE
The General Services Administration has authorized the use of this commercial item
description (CID) for all federal agencies.
1. SCOPE.
This CID covers air operated relay emergency valve used in vehicle air brake systems referred
to herein as relay valve.
2. SALIENT CHARACTERISTICS.
2.1 Materials. All metals used in the construction of the relay valve shall be made of corrosion
resistant material or protected to resist corrosion. The use of recovered material made in
compliance with regulatory requirements is acceptable providing that all requirements of this CID
are met (see 3.1).
2.1.1 Dissimilar metals. Dissimilar metals shall not be used in intimate contact with each other
unless protected against galvanic corrosion.
2.2 Design and construction. Unless otherwise specified in figure 1, the relay valve shall be
designed and constructed in accordance with the manufacturer s specifications and drawings.
Comments, suggestions, or questions on this document should be addressed to
U.S. Army RDECOM, Tank Automotive Research, Development and Engineering Center,
ATTN: RDTA-EN/STND/TRANS MS #268, 6501 E. 11 Mile Road, Warren, MI 48397-5000 or
emailed to usarmy.detroit.rdecom.mbx.tardec-standardization@mail.mil. Since contact
information can change, you may want to verify the currency of this address information using the
ASSIST Online database at https://assist.dla.mil.
AMSC N/A
FSC 2530
DISTRIBUTION A: Approved for public release
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
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