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|  MIL-V-5527A
(May 1951)
4.5.9 Burst Pressure .- Hydrostatic pressure shall be applied to the pressure port
with all other ports plugged. The pressure shall be applied at a rate not exceeding
25,000 psi per minute until a pressure of 5,250 psi is reached on a Class A valve or 10,250
psi on a Class B or Class AB valve. The valve shall withstand the specified pressure
without rupture. The pressure may be increased above these values after all other Qualifi-
cation tests have been conducted in order to secure data on actual burst pressure.
5. PREPARATION FOR DELIVERY
5.1 Application.- The packaging, packing, and marking requirements specified
herein
apply only to direct purchases by or direct shipments to the Government.
5.2 Preservation, Packaging, and Packing.- The interior surfaces of all parts of
each valve shall be flushed with a rust inhibiting fluid conforming to Specification
MIL-O-6083. The ports shall be sealed by closures conforming to Specificatin MIL-C-5501.
and the valves shall be packaged for delivery in accordance with group I of Specification
MIL-P-6064 in a type I container.
5.3 Marking and Labeling.- Marking shall be in accordance with the requirements of
Specification MIL-P-6064, and as specified herein,
5.3.1 Packages.- Each interior package shall be durably and legibly marked with
the followng iinformation in such a manner that the markings will not become damaged when
the packages are opened:
VALVE; AIRCRAFT HYDRAULIC THERMAL EXPANSION RELIEF
Specification MIL-V-5527A
MS or AN Part No.
Manufacturer's Part No.
Name of Manufacturer
Name of Contractor (if different from manufacturer)
Contract or Order No.
5.4 Shipping Containers.- Each shipping contrainer shall be marked in accordance
with tine requirements applicable to the individual Services, as specified in Specifica-
tion 94-40645 for the Air Force, and the Navy Shipment Harking Handbook for the Navy.
NOTES
6.
6.1 Intended Use.- The thermal relief valves covered by this specificatin are
intended for use in aircraft hydraulic systems as covered by Specification MIL-H-5440
to provide for relief of excessive pressure resulting from volumetric changes, and should
not be used with any hydraulic fluid other than that conforming to Specification MIL-O-5606
unless otherwise specified by the Procuring Service.
6.1.1 Class A valves shall be used only in l,000 and l,5OO psi systems as defined
in Specification MIL-H-5440.
6.1.2 Class B valves shall be used only in 3,000 psi systems.
6.1.3
Class AB valves may be used in either 1,000, 1,500, or 3,000 psi system.
6.2 Superseding Data.- This specification supersedes Specification MIL-V-5527,
which was the number assigned by Cover Sheet to Specification AN-V-28.
6.3 CderinRData.- Requisitions, contracts, and orders shaould state the MS or
AN part number of the-valves desired, and whether overseas packing is desired.
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