MIL-PRF-25962F
3.2 Recycled, recovered, or environmentally preferable materials. Recycled, recovered,
or environmentally preferable materials should be used to the maximum extent possible,
provided that the material meets or exceeds the operational and maintenance requirements, and
promotes economically advantageous life cycle costs.
3.3 Materials. All materials shall be suitably treated to resist corrosion due to
electrolytic decomposition, salt air, and any other atmospheric condition that may be encountered
during operational use or storage (see 6.4). Materials that come into contact with liquid oxygen
(LOX) shall not contain hydrocarbons, shall be non-impact sensitive and non-degradable, and
shall have a brittle point below -297°F.
3.4 Interface.
3.4.1 Dimensions. The valve shall conform to the dimensions in FIGURE 1 (see 4.5.1).
3.4.2 Threads. All pipe threads shall conform to ASME B1.20.1 (see 4.5.1).
3.4.3 Markings. The word "OUTLET" and an arrow pointing in the direction of the
outlet shall be stamped on the valve body. In addition, the words "OPEN" and "CLOSED" with
an arrow pointing to these directions shall conform to FIGURE 1 (see 4.5.1).
3.4.4 Weight. The weight of the valve shall be not greater than 0.25 pounds (see 4.5.1).
3.5 Performance.
3.5.1 General. The valve shall operate only when the handle is placed in the "OPEN" or
"CLOSED" position, and shall not change operating conditions without handle actuation. In
addition, the valve shall operate in any mounting position (see 4.5.10).
3.5.2 Flow rate. The valve flow shall be not less than 150 liters per minute (L/min)
when subjected to a pressure not greater than 5 psig (see 4.5.2).
3.5.3 Outlet port leakage. The outlet port leakage shall be not greater than 0.02 L/min
when pressurized to 70 psig, 300 psig, and 10 inches of water (see 4.5.3).
3.5.4 High temperature operation. The valve shall withstand a temperature not less than
260°F for not less than 4 hours (see 4.5.4).
3.5.5 Low temperature operation. The valve shall withstand a temperature not greater
than -65ºF for not less than 4 hours (see 4.5.5).
3.5.6 Vibration. The valve shall be subjected to a vibration at double amplitude of 0.02
inches and a frequency changing from 10 to 50 to 10 Hz (see 4.5.6).
3.5.7 Overall leakage. The valve body shall not leak with an internal pressure of not less
than 500 psig (see 4.5.7).
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