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|  MIL-V-5527A
(May 1951)
3.
REQUIREMENTS
3.1 Materials.- Materials and processes used in the manufacture of thes valves
shall be of high quality, suitable for the purpose and shall conform to applicable Govern-
ment specifications. Materials conforming to contractor's specifications may be used,
provided the specifications are satisfactory to the Government and contain provisions for
adequate tests. The use of contractor's specifications will not constitute waiver of
Government inspection.
3.1.1 Metals.- All metals used in the construction of these valves, except metal
which is in constant contact with the hydraulic fluid, shall be of a corrosion-resisting
type or shall be adequately protected to resist corrosion during the normal service life
of the valve. The use of dissimilar metals, especially brass, copper, or steel, in metal
to metal contact with aluminum or aluminum alloy, shall be avoided wherever practicable.
3.1.2 Plastic Parts.- The use of plastic parts shall be subject to the approval
of the Services for the specific application involved.
3.1.3 Selection of Materials.- Specifications and standards for all materiaals, parts,
and Government certification and approval of processes and equipment which are not
specifically designated herein and which are necessary for the execution of this specifica-
tion, shall be selected in accordance with ANA Bulletin No. 143, except as provided in
the following paragraph.
3.1.3.1 AN or JAN Standard parts. - AN or JAN Standard parts shall be used whereever
they are suitable for the purpose, and shall be identified on the drawing by their part
numbers. Commercial utility parts such as screws, bolts, nuts, cotter pins, etc., may be
used, provided they possess suitable properties and are replaceable by the AN or JAN
Standard parts without alteration} and provided the corresponding AN or JAN part numbers
are referenced in the parts list and, if practicable on the contractor's drawings. In
the event there is no suitable corresponding AN or JAN Standard part in effect on date of
invitation for bids, commercial parts may be used provided they conform to all requirements
of this specification.
Design and Construction.-
3.2
General. - The configuration, dimensions, and other details of design shall
3.2.1
Conform to the requirements of the applicable drawings.
3.2.2 Temperature Range.- The 0 valves0 shall be designed to operate satisfactorily
throughout a temperature range of -54 to +71 C (-65 to +160F).
3.2.3 Plugs.- All plugs, except permanently installed plugs which will not have to
be removed during the life of the valve, shall conform to Drawing AN814 and shall be sealed
3
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