MIL-PRF-25370F
3.2
First article. When a first article is specified (see 6.2 and 6.4) it shall be subjected to first
article inspection in accordance with 4.5.
3.3
Age. Unless otherwise specifically approved by the procuring activity, all materials and
component parts used in the inflator valve shall have been manufactured not more than 12 months
prior to the date of delivery to the Government.
3.4
Materials. All materials shall be suitably treated to resist corrosion due to electrolytic
decomposition, fungus, salt spray, and any other atmospheric condition that may be encountered
during operational use or storage.
3.5
Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or
environmentally preferable materials should be used to the maximum extent possible provided that
the materials meet or exceed the operational or maintenance requirements, and promote
economically advantageous life cycle costs.
3.6
Operation. The pneumatic inflator valve shall be capable of being easily operated in
world-wide environmental conditions expected to be encountered by aircrew personnel. The unit
shall function easily by personnel wearing standard flight gear.
3.6.1 Inflator valve housing. The inflator valve shall consist of an actuator that shall be flush
with the inflator valve housing in the unopened position. The actuator shall be secured in the
unopened position. The inflator valve shall consist of a piercing mechanism that will retract
immediately from the opening of the punctured cylinder, and have a seal that shall prevent leakage
of the life preserver cell with the actuator in any position. The inlet of the inflator valve shall be
threaded to accept a carbon dioxide cylinder conforming to MIL-PRF-25369. A locking
mechanism shall be provided to retain the carbon dioxide cylinder in the inlet. An outlet shall be
provided to mount the inflator valve on the life preserver cell valve stem as shown in Figure 2. A
passage shall be provided for conducting gas from the punctured carbon dioxide cylinder to the
outlet when actuated. The outlet shall align with the hole in the side of the stem regardless of
which side of the outlet is toward the base of the stem.
3.6.2 Valve stem cap. A valve stem cap (see figure 2) shall be provided to hold the inflator
valve in place on the valve stem.
3.7
Performance.
3.7.1 Operation test without cylinder. An actuating load of not more than 20 pounds shall
operate the piercing mechanism.
3.7.2 Piercing mechanism. The piercing mechanism shall be capable of puncturing a carbon
dioxide cylinder conforming to MIL-PRF-25369 for the life of the inflator valve. The mechanism
shall be positioned so as not to accidentally puncture the cylinder due to vibrations or other
motion encountered in an operational or storage environment.
3
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