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|  MIL-V-16556E(SH)
4.2.4 Hydrostatic.
The valve shall be subjected to a hydrostatic pressure
of 100 lb/in gauge for strength and porosity. There shall be no visible leakage
through any part of the valve body, the packing gland, or seats with the valve in
either of its operating positions.
4.2.5 Seat tigh tness. Each valve shall be subjected to the leak tests
specified in 4.2.5.1 through 4.2.5.3. Test duration shall be 5 minutes at each
test condition. The valve assembly shall be vented prior to each test to ensure
that no air is present. No leakage shall be observed with the valve seat visible
during the duration of each test.
4.2.5.1 Latched position. The valve shall be tested in the latched
position, inlet port pressurized to 5
and the dump port at 0
4.2.5.2 Dump position.
The valve shall be tested in the dump position,
inlet port pressurized to 5
and the outlet port at O
4.2.5.3 Latched position. The valve shall be tested in the latched
position, dump port pressurized to 15
and the inlet port at 0
4.3 Production inspection.
Each valve offered for delivery shall be
subjected to the examination and test specified in 4.2.1, 4.2.4, and 4.2.5.
4.4 Inspection of packaging. Sample packages and packs, and the inspection
of the preservation-packaging, packing and marking for shipment and storage shall
be in accordance with the requirements of section 5 and the documents specified
therein.
5.
PACKAGING
(The packaging requirements specified herein apply only for direct Govern-
ment acquisition. For the extent of applicability of the packaging requirements
of referenced documents listed in section 2, see 6.5.)
5.1 Presentation. packing and marking. The equipment, accessories,
technical manuals and repair parts shall be preserved and packed by level A, B,
or C and marked as specified (see 6.2.1) in accordance with MIL-E-17555.
5.2 Use of polystyrene (l oose-fill) material.
5.2.1 For domestic shipm ent and early equipment installation and level C
packaging and packing . Unless otherwise specified (see 6.2.1), use of poly-
styrene (loose-fill) material for domestic shipment and early equipment installa-
tion and level C packaging and packing applications such as cushioning, filler
and dunnage is prohibited. When approved, unit packages and containers (interior
and exterior) shall be marked and labeled as follows:
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