MIL-DTL-25516F
TABLE XI. Fuels.
Temp °F
Fluids
Specification
Immersion time
(hours)
Aviation gasoline
ASTM D910
160
168
Aviation fuel (grade JP-4)
MIL-DTL-5624
160
168
Oil, lubricating, jet engine
MIL-PRF-6081
160
20
(grade 1010, petroleum base)
Lubricating oil, aircraft
MIL-PRF-7808
160
20
Salt water (95 percent water, 5 percent
chloride)
160
20
Diesel, fuel oil
A-A-52557
160
168
Hydrocarbon fluid
ASTM D471
160
168
Aviation hydraulic fluid, petroleum base
MIL-PRF-5606
160
20
4.7.18 Altitude humidity cycling (see 3.6.17). Connectors shall be mounted on a sealed test vessel and
subjected to alternate vacuum-pressure environment in the presence of test fluid and water vapor at both
high and low temperatures to determine leak integrity and the effects on electrical characteristics.
Figure 4 shows the recommended test vessel.
4.7.18.1 Leak integrity.
a. Hermetically sealed and pressurized connectors shall be installed approximately as shown on the
right side of the pressure-tight vessel as shown on figure 4.
b. The test box shall be filled with test fluid, in accordance with type III of ASTM D471, to a level of at
least 4 inches above the connectors.
c. With the fluid in the test box at room temperature, 6 pounds per square inch pressure (lb/in2) shall
be applied to the box and held for 1 hour while checking for leaks.
d. With the test box at room temperature, pressure shall be slowly increased to 20 lb/in2 and then
relieved. This cycle shall be repeated for a total of 10 times. On the tenth cycle, the pressure
shall be held at 20 lb/in2. A check shall be made for signs of leakage and pressure shall be
relieved.
e. The temperature of the test box shall be decreased to 54°C and pressure of 6 lb/in2 shall be
applied and held for 1 hour while checking for leaks. The temperature shall be held at 54°C and
the pressure slowly increased to 20 lb/in2 and then relieved. This cycle shall be repeated for a
total of 10 times. On the tenth cycle, the pressure shall be held at 20 lb/in2. A check shall be
made for leakage. Pressure shall be relieved.
f. The temperature of the test box shall be allowed to return to room temperature and, with pressure
relieved, the wire in the connector shall be pulled from the inside of the test box with a force of 5
± .5 pounds. (For this test, a mechanical device may be rigged to pull the cable or contact from
the inside without removing the cover.). With the test box still at room temperature, the box shall
be pressurized at 6 lb/in2 pressure and a check made for leaks. The pressure shall be
increased to 20 lb/in2 and a check made for leaks. Upon completion of these tests, the pressure
shall be relieved.
23
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business