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|  MIL-V-5527A
(Hay 1951)
3.9 Special Tools .- The design shall be such that specifal or unusual tools will
not be required for normal maintenance and inspection of the valves.
Marking of Ports .- Pressure and return ports shall be clearly and permanently
3.10
marked.
Identification of Product.-
3.11
3*11*1 Nameplate.- Each valve shall be clearly and permanently identified by stamp-
ing or by a securely attached nameplate, with the following information:
VALVE, AIRCRAFT HYDRAULIC THERMAL EXPANSION RELIEF
MS or AN Part s No.
Manufacturer Part No.
Manufacturer's Serial No.
Manufacturers Name or Trade-Mark
Pressure Range
Decalcomanias are not considered permanent marking for this purpose
3.11.2 Use of AN or MIL Designations.- AN or MIL designations shall not be applied
to a product, except for Qualification test samples, nor referred to in correspondence or
sales matter, until notification has been received from the Qualifying Service that the
product has been approved for aeronautical use.
3.12 Workmanship.- Workmanship shall be of a sufficeiently high grade to insure
proper operation and service life.
4.
.
SAMPLING, INSPECTION, AND TEST PROCEDURES
4.1 Classification of Tests.-
The inspection and testing of valves shall be classi-
fied as follows:
(a) Qualification tests: Qualification tests are those
tests accomplished on samples submitted for qualifi-
cation as satisfactory products.
(b) Inspection tests: Inspection tests are those tests
accomplished on valves-manufactured and submitted for
acceptance under contract.
4.2 Qualification Tests.-
Sampling Instructions.-
4.2.1
4.2.1.1 The Qualification test sample shall consist of two valves of each part
number upon which qualification is desired.
4.2.1.2 One of these valves shall be assembled of selected parts such that the
clearance, with regard to linear, diametral, and concentric tolerances, between the moving
members, conducive to malfunction at extreme temperatures, will be within 10 percent of
the minimm clearance permitted by the manufacturers drawings, except that "O" ring grooves
which are fabricated in accordance with Specification MIL-P-5514 shall be within the
drawing tolerances. This sample shall be marked No. 1.
4.2.1.3 The second sample shall be assembled of selected parts such that the clear-
ances, with regard to linear, diametral, and concentric tolerances between moving members,
conducive to malfunction at extreme tempratures, will be within 10 percent of the maximum
s
permitted by the manufacturer drawings, except that "O" ring grooves which are fabricated
in accordance with Specification MIL-P-5514 shall be within the drawing tolerances. This
sample shall be marked No. 2.
5
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