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|  MIL-R-24159A(SH)
(Industry association specifications and standards are generally available
for reference from libraries. They are also distributed among technical groups
and using Federal agencies.)
2.3 Order of precedence. In the event of a conflict between the text of
this specification and the references cited herein, the text of this specifica-
tion shall take precedence.
REQUIREMENTS
3.
3.1 First article. When specified (see 6.2.1), a sample shall be subjected
to first article inspection (see 4.3 and 6.3).
3.2 Materials. Materials forming a part of the finished product shall be
for the purpose intended. The materials shall be free from any-defects that
might affect the serviceability or appearance of the finished product. Materials
shall be in conformance with the requirements specified herein. Bolts, nuts,
studs , screws and other such fastenings or fittings as may be used shall be of
a corrosion-resisting material, or of a material treated in a manner to render
it resistant to corrosion. Self-tapping screws with sheet metal threads shall
not be used. Gaskets shall be fabricated of a good commercial gasket material
and shall be a single piece. Screen material shall be 12 by 12 mesh and fabri-
cated of 0.032-inch diameter steel wire and galvanized or zinc coated. Materials
not specified hereinafter shall be selected on the basis of meeting the perform-
ance requirements specified herein.
3.2.1 Recovered materials. Unless otherwise specified herein, all equip-
ment, material, and articles incorporated in the products covered by this
specification shall be new and shall be fabricated using materials produced
from recovered materials to the maximum extent practicable without jeopardizing
the intended use. The term "recovered materials" means materials which have
been collected or recovered from solid waste and reprocessed to become a source
of raw materials, as opposed to virgin raw materials. None of the above shall
be interpreted to mean that the use of used or rebuilt products is allowed
under this specification unless otherwise specifically specified.
3.3 General design. The arrangement and construction of the C02 absorbent
canister receptacle shall be as shown on figure 1. It shall accommodate five
standard lithium hydroxide canisters as specified in MIL-C-21OO4 and shall
incorporate a removable filter assembly. The canisters shall be arranged in a
circular configuration and enclosed in a cylindrical casing. An electric motor
with a fan wheel shall be mounted in the center of the housing and arranged so
that air is drawn through the C02 absorbent canisters and discharged to the
atmosphere
The filter core shall have a by-pass valve arranged in such a
q
manner that the filter will collect any loose particles of lithium hydroxide
when the canisters are being installed or replaced. Spring loaded clamps shall
be provided to hold the canisters securely in place. A gasket shall be provided
between the filter cap and the filter plenum top to prevent air leakage around
the filter. Circular screens shall be provided over each of the five openings
in the casing plenum. One screen shall be removable for access to the plenum.
The receptacle shall be provided with two lifting handles located diametrically
opposite and arranged so as not to project beyond the outside periphery of the
casing. The motor and fan wheel assembly shall be provided with removable cover
3
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