MIL-PRF-9439F
above for 30 minutes on each axis. After approximately 4.5 hours of total vibration, the valve
shall be subjected to the torque and leakage tests specified (see 4.6.4 and 4.6.6).
4.6.12 Overpressure safety device. While being exposed to a constant temperature not
less than 160oF, the valve shall then be subjected to a minimum internal gas pressure of 2,200
psig for 30 seconds. The internal pressure shall then be raised in increments of approximately 50
psig and maintained at each pressure for 30 seconds. The pressure shall be raised in this manner
until the overpressure safety device activates. The activation pressure shall be between 2,700 and
3,000 psig.
4.6.13 Oxygen bomb test.
4.6.13.1 Test setup. The test setup used in performing the bomb tests shall be capable of
delivering a minimum pressure of 2,300 psig. When opened, the test setup shall deliver at least
95% of the total pressure rise in 20 +7 milliseconds at the valve being tested. The pressure shall
be delivered through a 0.188 inch ID steel tube approximately 6 inches long (see 6.10). The test
shall contain an off-line device capable of releasing pressure without removing the valve.
4.6.13.2 Procedure. The valve inlet (0.5 or 1.0 inch ANPT) shall be sealed against a
minimum pressure of 2,300 psig and the outlet shall be installed on the test setup. With the valve
in the open position, the test setup shall be activated (opened) and the valve pressurized to a
minimum pressure of 2,300 psig. This pressure shall be maintained for 30 seconds and then
released. This operation shall be repeated 3 times. There shall be no indication of internal or
external charring or deterioration. The valve shall then be subjected to the torque, flow, and
leakage tests (see 4.6.4, 4.6.5, and 4.6.6).
4.6.14 Salt fog. When specified (see 6.2), the valve shall be subjected to the salt fog test
in ASTM-B117 for 50 hours. There shall be no visible damage to the valve. The valve shall then
be subjected to the torque and leakage test (see 4.6.4 and 4.6.6).
4.6.15 Cap. The cap shall be subjected to a 100 lb pull. The cap shall remain attached to
the tether and the tether shall remain attached to the valve.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as
specified in the contract or order (see 6.2). When packaging of materiel is to be performed by
DoD or in-house contractor personnel, these personnel need to contact the responsible packaging
activity to ascertain packaging requirements. Packaging requirements are maintained by the
Inventory Control Point's packaging activities within the Military Service or Defense Agency, or
within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM
products, or by contacting the responsible packaging activity.
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