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Figure 4. Random vibration spectrum |
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|  MIL-V-29592(AS)
FIGURE 4. Random vibration spectrum.
4.7.12 Housing torque. This test shall be completed if required in the
applicable military specifiecation sheet. With the valve installed in a
manifold and lockwired in place, a strap wrench shall be applied to the valve
body and the torque, as specified in the applicable military specification
sheet, shall be applied to the valve, both in a clockwise and a counterclock-
wise direction. There shall be no structural failure, distortion, or
permanent deformation of the housing or end fittings. The valve shall be
subjected to the functional test (4.7.4) and the room temperature proof
pressure test (4.7.3) following the torque application.
4.7.13 Burst pressure. The automatic air vent valve and its environment
shall be maintained at 270 to 275F during this test. The outlet of the
automatic air vent valve shall be capped. Pressure shall be applied to the
inlet port of the valve at a maximum rate of increase of 1,000 psi per minute
until the specified burst pressure of 300 psi is reached. The pressure shall
be held for 5 minutes. The automatic air vent vavle shall have no leakage in
the form of drops, moisture, or wetness on any exterior surface. There shall
be no rupture of internal or external parts.
5. PACKAGING
5.1 Preservations and packaging. Preservation and packaging shall be in
accordance with MIL-STD-2073-1, level A or C as specified (see 6.2).
5.1.1 Level A.
5.1.1.1 Cleaning. Prior to preservation, the automatic air vent valve
shall be cleaned ultrasonically (or by equivalent method) until free from all
metal chips, grip, dirt, and other foreign matter. The cleaning method
utilized shall not have deleterious effects on any material. Care shall be
taken after cleaning to insure that the valve is not contaminated prior to or
during preservation or packaging.
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