MIL-PRF-38201D
3.4.3.1 Valve cap. A cap shall be provided for the outlet end of the valve. The valve shall have
an external gripping surface. The cap shall be attached to the valve housing while allowing
installation and removal of the cap. The attachment shall have a minimum breaking strength of
130 pounds, shall be non-sparking, and shall turn freely to minimize kinking.
3.5
Orientation. The valve shall operate while oriented in any position.
3.6
Interface. The valve shall be as defined by figure 1 and shall conform to the envelope
dimensions shown in figure 2.
3.6.1 Screw threads. Screw threads, if used on the valve, shall conform to MIL-S-7742 or any
other commercially acceptable thread standard. If screw threads are used in assembling the
valve they shall be securely locked by lockwashers, locknuts, or any other low temperature
oxygen compatible means.
3.6.2 Weight. The total weight of the valve assembly shall not exceed three pounds (lbs).
3.6.3 Engagement pins. The valve designs shall incorporate engagement pins similar to those
shown on figure 2. The pins shall interface with the CRU-50/A valve assembly.
3.7
Performance.
3.7.1 Leakage (CRU-59/E valve only). Leakage of the valve shall not exceed 0.05 liters per
minute (lpm) when the valve is disconnected and a gaseous pressure of 50 lbs per square inch
gauge (psig) is applied to the inlet connection.
3.7.2 Leakage (primary connection). Combined leakage of the valves shall not exceed 0.05
lpm when the valve is primarily connected and a gaseous pressure of 50 lbs psig is applied to the
inlet connection.
3.7.3 Leakage (complete connection, liquid). There shall be no visual evidence of leakage
from a completely connected valve when a flow of test liquid is applied to the CRU-59/E valve
inlet under a pressure of 30 psig.
3.7.3.1 Leakage (complete connection, gaseous). Leakage from a completely connected valve
shall not exceed 0.05 lpm when subjected to a gaseous pressure of 50 psig applied to the inlet
connection of the CRU-59/E valve.
3.7.4 Flow rate. Flow rate from the CRU-50/A valve shall be greater than 40 lpm when a
maximum pressure of 3 psig is applied to the inlet of the CRU-59/E valve.
3.7.5 Simulated aircraft-mounted converter filling. There shall be no leakage from a
completely connected valve mounted in a horizontal or vertical position when a flow of test
liquid under a minimum pressure of 30 psig at the valve inlet is passed through both valves.
3.7.6 Connection, disconnection torque. The torque required to make the connection and
disconnection of the CRU-59/E and CRU-50/A valves shall be between 20 and 85 inch pounds.
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