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|  MIL-C-21049F
4.7.3.1 Type 1. With the male and female halves connected and the outlet
port capped, a-pressure of 120 psig gaseous oxygen shall be applied to the inlet
port. Mith this pressure maintained, and the locking device disengaged, the
torque required to disconnect and connect the coupling halves shall be measured
for five (5) cycles. One cycle shall consist of a disconnection and connection of
the coupling halves. The torque required to disconnect and connect the coupling
halves shall pass the requirements specified in 3.6.2.1.
4.7.3.2 Type II: The torque required to disconnect and connect the coupling
halves shall be measured for five (5) cycles. One cycle shall consist of a
disconnection and connection of the coupling halves.The torque required to
disconnect and connect the coupling halves shall pass the requirements specified
in 3.6.2.2.
4.7.4 Locking device, type I.
*
4.7.4.1 Without torque applied. With the coupling halves connected and the
locking device engaged, the axial force required to depress the positive locking
device sufficiently to disengage it shall conform to the requirements specified in
3.6.3.1.
4.7.4.2 With torque applied. With the coupling halves connected and the
locking device engaged, a torque of 35 inch pounds shall be applied to the
coupling assembly in the direction of disconnection. The locking device shall
pass the requirements specified in 3.6.3.2.
4.7.5 Leakage, type I.
4.7.5.1 Coupling halves. The inlet end of the male and the outlet end of the
halves shall each be connected to a gaseous oxygen source capable of providing a
pressure up to 120 psig. With the coupling halves disconnected, pressures of 75
and 120 psig shall be applied to each coupling half. Each pressure shall be
applied for a minimum of 3 minutes and leakage measured. The coupling shall pass
the requirements specified in 3.6.4.l.
4.7.5.2 Coupling assembly. With the coupling halves connected, a pressure of
75 and 120 psig shall be applied to the inlet end of the male coupling with the
outlet of the female coupling capped. Each pressure shall be applied for 3
minutes and leakage measured. The coupling shall pass the requirements specified
in 3.6.4.2.
4.7.5.3 Coupling assembly, with side load. The coupling assembly shall be
mounted to a test fixture In the manner shown in figure 1. The coupling assembly
shall be in a vertical position with the male fitting end facing down and firmly
connected to the test fixture. A pressure of 100 + 10 psig shall be applied
through the male fitting end. While maintaining this pressure, a 5 pound side
load shall be applied to the upper edge of the capped outlet of the female coupling
in the location and directions shown in figure 1. The load shall be maintained
for a minimum of 1 minute in each direction and the leakage measured. The
coupling shall pass the requirements specified in 3.6.4.3.
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