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Determination of defect or failure
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Valve, Fuel Tank Pressurization
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Leakage at proof pressure



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MIL-V-82444A(OS)
4.5.1.2 Sample squibs
a.
Bridge wire resistance, prior to firing
b.
Insulation resistance, prior to firing
c.
Auto-ignition, low temperature
d.
No-fire current
e.
Firing current
4.5.2 Each valve in the lot shall be subjected to the tests detailed
in 4.5.6.1 through 4.5,6.3.
4.5.3 A sample of valves shall be selected using-the plans and pro-
cedures set forth in MIL-STD-105 Inspection Level 11, and subjected to
the additional tests and examination in 4.5.6.4 and 4.5.6.5.  An AQL of
1.0 shall be used.
4.5.4 Test conditions.  Unless otherwise specified, the valve shall
be subjected to the acceptance tests under the following conditions:
a.
Temperature:
Room ambient +32 F to +98 F
Normal ground atmospheric pressure
b.
Altitude:
c.
Vibration:
None
d.
Humidity:
Room ambient
The test equipment setup shall be in
4.5.5 Test equipment and setup.
accordance with Figure 2.
a. Inert gas supply:
O to 4700 psig minimum
b. Pressure gage:
O to 5000 psig, accuracy to 2
percent, full scale
c. Power supply:
(1) Constant current, presettable
pulse amplitude and duration,
2 amperes, 5 0.5 ms pulses .
into loads of 0.6 to 1.2 ohms
(2) Constant current, 0.2 0.02
ampere, pulses 5-minute
minimum into loads-of 0.6 to
1.2 ohms.
d. Megger:
500 5O volts rms, 60 Hz across a
load of 2 megohms minimum
e. Resistance measuring
device:
Accuracy to 3 percent, readout.
resolution 0.1 ohms minimum, current
10 milliamperes maximum.
15

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