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MIL-V-19069B
to design, construction, weight, workmanship, identification of product, con-
formance to applicable drawings and for any visible defects. The manufac-
turer's drawings and the manufacturer's applicable specifications which were
submitted when qualification approval was granted shall be used by the
Inspector, as necessary, to determine that the product submitted under con-
tract is identical to the item as qualified.
4.7.2 Proof pressure.  The proof pressure of 4500 psi shall be applied
in both the free- and reverse-flow directions at least two successive times in
each direction, and held for two minutes for each pressure application.  For
the reverse-flow direction, the poppet shall be mechanically unseated between
applications of the test pressure.  There shall be no evidence of external
leakage, failure or permanent set.
4.7.3 Leakage.  This inspection 0shall be conducted with fluid and
ambient temperatures between 70 and 120 F. This inspection may be performed
with the valve held in any position. The valve shall be inspected for inter-
nal leakage by applying the pressures listed in table III in the reverse-flow
direction for a minimum of five minutes each.  The poppet shall be mechani-
ally unseated between pressure applications. For each pressure, the leakage
measurement period shall consist of the last three minutes of the five-minute
period.  The internal leakage shall not exceed three drops in a three-minute
period.  There shall be no measurable external leakage during this inspection.
4.7.4 Cracking pressure.  An Inspection identical to cracking pressure
specified for qualification (see 4.5.6.2) shall be performed.
4.7.5 Packing and marking.  The inspector snail ascertain that the pack-
ing and marking of the valves conforms to this specification.
PACKAGING
5.
5.1 Packing.  Hydraulic check valves shall be sealed with closures con-
forming to MIL-C-5501. For Navy aircraft, only metal closures conforming to
MIL-C-5501 as required by NAVAIR manual NAVAIR 01-14-17 shall be used.
5.2  Marking.  Interior packages and exterior shipping containers snail
be marked in accordance with MIL-STD-129. In addition, the following shall be
added:
MS Part No.
Manufacturer's Part No.
6.
NOTES
6.1  Intended Use.  The valves covered by this specification are intended
for use in aircraft type II hydraulic systems conforming to specification
MIL-H-5440.
6.2 Ordering data.  Procurement documents shall specify the MS part
number of the valve desired (see 1.2).
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