E female liquid oxygen filler valve.

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MIL-PRF-38201D

4.7.3 Leakage (complete connection). The CRU-59/E valve shall be attached to a liquid

oxygen supply source at 30 psig. A CRU-50/A valve (MIL-PRF-25961) shall be fitted to a 300

psig working pressure LOX converter in a simulated aircraft manner. The converter shall be

partially filled and shall be at operating pressure. With the valve completely connected (poppets

unseated) to the CRU-50/A valve. A flow of test liquid under a pressure of 30 psig measured at

the valve inlet shall be passed through the two valves for at least 10 minutes. During this test,

the valves shall be disconnected and reconnected at least three times. Under all conditions of test

liquid flow and disconnections, there shall be no visual evidence of leakage of test liquid from

either the poppet or interior areas, as evidenced by any liquid flow. The CRU-59/E valve shall

then be subjected to the tests of paragraph 4.7.1.

4.7.4 Flow rate. The valve shall be completely connected (poppets unseated) to a CRU-59/A

valve and a flowmeter shall be connected to the outlet of the valve by means of a 3/8 inch tube.

A maximum pressure of 3 psig shall be applied to the inlet of the CRU-59/E valve and flow from

the CRU-59/A valve shall be greater than 40 lpm.

4.7.5 Simulated aircraft-mounted converter filling. The valve shall be connected to a valve

conforming to MIL-PRF-25961 that is mounted in a horizontal position as shown in figure 3. A

flow of test liquid under a minimum pressure of 30 psig at the valve inlet shall be passed through

both valves. There shall be no evidence of test liquid leakage from the valve or from the mating

surfaces. This test shall be repeated with the MIL-PRF-25961 valve mounted in a vertical

position with the inlet of the CRU-59/E valve down. During both of these tests the valves shall

be disconnected and visually inspected for entrapment of liquid between mating surfaces and

leakage.

4.7.6 Connection, disconnection torque. The CRU-59/E valve shall be completely connected

(poppets unseated) to a CRU-59A valve and then completely disconnected. The torque required

to make this connection and disconnection shall not exceed 85 inch-pounds nor be less than 20

inch-pounds.

4.8

Environmental tests.

4.8.1 High temperature exposure. The valve shall be exposed to a temperature of 160 � 5 �F

for a minimum of four hours. While exposed to this temperature, the valve assembly shall be

subjected to and pass the examination and tests of paragraphs 4.7.1, 4.7.2, and 4.7.3. The valve

assembly shall be removed from the chamber and immediately subjected to the test in paragraph

4.7.5.

4.8.2 Low temperature exposure. The valve shall be exposed to a temperature of -65 � 5 �F for

a minimum of four hours. While exposed to this temperature, the valve assembly shall be

subjected to and pass the examination and tests of paragraphs 4.7.1, 4.7.2, and 4.7.3. The valve

assembly shall be removed from the chamber and immediately subjected to the test in paragraph

4.7.5.

4.8.3 Vibration. The valve assembly with cap shall be tested in accordance with

MIL-STD-810, Method 514, test procedure I, category 10. At the conclusion of these tests, the

tests in paragraphs 4.7.1, 4.7.2, 4.7.3, 4.7.4, 4.7.5, and 4.7.6 shall be performed.