MIL-DTL-27166F
4.6.3.4 Vibration.
ASTM D999, Method B shall be used. After completion of the test, the valve shall be tested as
specified in 4.6.1.2 and applicable sub-paragraphs.
4.6.3.5 Sand and dust.
MIL-STD-810, Method 510.4, Procedure I (Blowing Dust), shall be used. The air velocity
through the test chamber shall be 5 ft/s ±1.6 ft/s (1.5 m/s ± 0.5 m/s). The test temperature shall
be 73 °F (23 °C). At least two (2) complete cycles as specified in 4.6.1.1.1 or 4.6.1.1.2 shall be
accomplished each hour during the test. After completing the test, the valve shall be tested as
specified in 4.6.1.2 and applicable sub-paragraphs. Removal of accumulated dust from the test
item by brushing, wiping, shaking, air blast, or vacuum cleaning prior to testing shall not be
permitted.
4.6.3.6 Rough handling.
The valve shall be mounted in a container conforming to figure 1. The container shall be
dropped three (3) times on each of the three (3) mutually perpendicular adjoining faces, for a
total of nine (9) drops, from a height of 3 ft (0.91 m) onto a concrete surface. The valve shall
then be tested as specified in 4.6.1.2 and applicable sub-paragraphs.
4.6.3.7 Salt fog.
MIL-STD-810, Method 509.4, Procedure I shall be used. After completion of the test, the valve
shall be tested as specified in 4.6.1.2 and applicable sub-paragraphs.
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