MIL-DTL-27166F
5.
PACKAGING
5.1
Packaging.
For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor
personnel, these personnel need to contact the responsible packaging activity to ascertain
packaging requirements. Packaging requirements are maintained by the Inventory Control
Point's packaging activities within the Military Service or Defense Agency, or within the military
service's system commands. Packaging data retrieval is available from the managing Military
Department's or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
6.
NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is
not mandatory.)
6.1
Intended use.
The air relief valves covered by this specification are intended for use in shipping containers as
a protective device against excessive internal pressure or vacuum resulting from air lift or
extreme temperature changes. Types I and II valves are intended to be used in sets of one of
each type where a separation of the pressure and vacuum relief ports may be desirable. Type
III valves are intended to be used where separation of pressure and vacuum relief ports is not
desirable or required.
6.1.1 Use recommendations.
The relief valves are intended to allow significant container weight reductions by limiting
differential gas pressure loads that the container must support. When a valve-equipped
controlled humidity container is to be in outdoor storage, the difference between pressure and
vacuum reseal pressures should be at least 3 psi (20.7 kPa) to prevent cyclic breathing caused
by daily solar heating and nightly cooling. Under some environmental conditions, breathing-
induced air movement into and out of the container may increase the desiccant depletion rate
unacceptably.
6.2
Acquisition requirements.
Acquisition documents should specify the following.
a. Title, number, and date of this specification.
b. Type and reseal pressures required (see 1.2 and 3.6.2).
c. When first article is required (see 3.1).
d. If required, manufacturer's part number (see 3.2.3).
e. If required, cracking pressure (see 3.6.2).
f.
Flow rate required (see 3.6.3 and 3.6.3.1).
g. Waiver of first article testing (see 4.3.1).
h. Packaging requirements (see 5.1).
6.3
Consideration of data requirements.
The following data requirement should be considered when this document is applied on a
contract. The applicable Data Item Description (DID) should be reviewed in conjunction with the
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