MIL-DTL-19068B
In case of conflict between the requirements of this specification and SAE-AS8775, the
requirements of this specification shall govern.
3.2 Specification sheets. The individual item requirements shall be as specified herein
and in accordance with the applicable specification sheets. In the event of conflict between the
requirements of this specification and the specification sheet, the latter shall govern.
3.3 First article test. When specified (see 6.2), a sample valve shall be subjected to first
article inspection in accordance with 4.4, table I.
3.4 Design and construction. The design and construction of the shuttle valves shall be
in accordance with MS28766 for direct mounting and MS28767 for internal threaded tube fitting
mounting. The dimensions shall be as shown in the applicable specification sheets.
3.5 O-rings. If O-rings are used, they shall conform to SAE-AS28775 and shall be
compatible with hydraulic fluid, fuel, and oil. They shall operate with type II hydraulic systems
and shall meet the age requirements specified in that standard. The O-rings shall be installed as
specified in SAE-AS28775.
3.6 Materials. Materials shall be as specified on the applicable specification sheets. If no
specific material is specified on the specification sheets, the materials shall be selected in
accordance with SAE-AS8775. The material selected shall be compatible with hydraulic fluid,
light weight, corrosion resistant, and shall meet the performance requirements of this
specification.
3.7 Aluminum alloy forging. If aluminum alloy forging is used, it shall be of corrosion
resistant type or treated with stress corrosion.
3.8 Nonmetallic parts. All nonmetallic parts used shall be compatible with hydraulic
fluids, oil, and fuel.
3.9 Finish. The finish requirements shall be in accordance with the applicable
specification sheets. Cadmium plating shall not be used. The finished parts shall have corrosion
protection and shall operate in the highly corrosive environment.
3.10 Recycled, recovered, or environmentally preferable materials. Recycled, recovered,
or environmentally preferable materials should be used to the maximum extent possible,
provided that the material meets or exceeds the operational and maintenance requirements, and
promotes economically advantageous life cycle costs.
3.11 Hazardous substances and ozone depleting chemicals. If the tests contain
hazardous chemicals, it shall be handled in accordance with Federal regulations and guidelines to
perform those tests. For further information about toxic chemicals and hazardous materials list,
consult the Environmental Protection Agency at https://www.epa.gov/ebtpages/pollutants.html.
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