MIL-DTL-87223A (USAF)
3.5.1 Minimum operating acceleration force.
When tested, the minimum acceleration force required to open the valve to permit flow of 0.01
liter per minute shall be between 1.25 and 1.50 Gz (see 4.5.2).
3.5.2 Outlet pressure regulation.
The outlet pressure schedule shall be within the range specified on figure 3 for the acceleration
force being applied when tested (see 4.5.3). The outlet pressure shall not fluctuate more than
±0.1 psi at any test point.
3.5.3 Leakage.
The leakage to the ambient shall not exceed 0.10 liter per minute. There shall be no leakage to
the outlet (see 4.5.4).
3.5.4 Anti-chatter.
The valve shall not chatter (see 4.5.5 and 6.3.2).
3.5.5 Response time.
When the force is being increased, the outlet pressure shall reach the specified range within two
seconds after application of the force. When the force is being decreased, the outlet pressure
shall reach the specified range within five seconds after decreasing the force. During testing,
the tank pressure shall reach the following specified values within the indicated response time
(see 4.5.6).
Force applied from
Tank pressure
Response time (maximum)
As specified on fig 3 for 10 Gz
1.0 sec
1 to 10 Gz
10 to 1 Gz
0
2.7 sec
1 to 6 Gz
As specified on fig 3 for 6 Gz
1.6 sec
6 to 1 Gz
0
2.2 sec
3.5.6 High temperature exposure.
The valve shall operate satisfactorily after completion of the high temperature test at 400 ±5 °F
(see 4.5.7).
3.5.7 Low temperature exposure.
The valve shall operate satisfactorily after completion of the low temperature test at -65 ±5 °F
(see 4.5.8).
3.5.8 Vibration.
The valve shall operate satisfactorily and shall show no evidence of mechanical or material
failure after completion of the vibration tests (see 4.5.9).
3.5.9 Salt fog.
The valve shall show no evidence of corrosion or mechanical failure after completion of the salt
fog test (see 4.5.10).
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