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Rapid warmup and high temperature |
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|  MIL-V-24694(SH)
4.7.8.2 Rapid warmup and high temperature. The low temperature shall then
be allowed to warm rapidly to a temperature of 135C. While the temperature 18
being raised and without waiting for the temperature to stabilize throughout the
setup, the pump shall be operated at the same rate as previously operated at room
temperature at temperature increments not to exceed 30C. The pressure values
obtained at these temperature increments and at 135C shall not vary more than
plus or minus 10 percent from those obtained during the room temperature test.
After maintaining the 135C temperature for at least 2 hours, the reseat test of
4.7.3.2 shall be conducted with MIL-H-83282 fluid at 135C with a flow of not less
than 1 liter per minute, The reseat pressure shall be not less than 90 percent of
the minimum reseat pressure required by figure 1.
4.7.9 Burst pressure. Fluid pressure shall be applied to the inlet port
with the outlet port blocked until the burst pressure specified in 3.5.9 or the
applicable specification sheet (see 3.1) is obtained, This pressure shall be
applied for a minimum of 2 minutes. At the end of this period, the valve
shall be examined and any sign of external or internal damage shall be cause
for rejection.
4.8 Inspection of packaging. Sample packages and packs, and the inspec-
tion 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.
PACKAGING
5.
(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 6.4.)
5.1 Preservation and packaging. Preservation and packaging shall be in
accordance with MIL-STD-794, level A, B or C, as specified (see 6.2.1).
5.1.1 Level A.
5.1.1.1 Cleaning. Prior to preservation, the valve shall be cleaned ultra-
sonically (or equivalent method) until free from all metal chips, grit, dirt and
other foreign matter. The cleaning method utilized shall not have deleterious
effects on any material (for example, metals, plastics) elastomers, and so forth).
Care shall be taken after cleaning to ensure that the valve is not contaminated
prior to or during preservation or packaging.
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