MIL --- DTL --- 51222E(EA)
AIR --- CONDITIONING AND REFRIGERATION INSTITUTE (ARI)
ARI STANDARD 700 --- Standard for Specifications for Fluorocarbons and other
Refrigerants
(Copies are available from ARI, 4100 N. Fairfax Dr., Suite 200, Arlington, VA 22203
https://www.ari.org).
2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of
a conflict between the text of this document and the references cited herein, the text of this doc-
ument takes precedence. Nothing in this document, however, supersedes applicable laws and
regulations unless a specific exemption has been obtained.
3. REQUIREMENTS
3.1 Materials and components. All materials and components cited on Drawing 5 --- 19 --- 2298
and subsidiary drawings shall conform to the specifications listed thereon or to the specific char-
acteristics set forth on the drawings. No visible growth of mildew shall be evident when tested
in accordance with method 5750 of FED --- STD --- 191. Cotton cloth shall be water repellent and
have a minimum spray rating of 50.0 when tested in accordance with method 5526 of FED ---
STD --- 191.
3.2 Assembly. The assembly of the gas filter shall be consistent with Drawing 5 --- 19 --- 2298
(see 6.3).
3.3 First article. When specified (see 6.2), a sample shall be subjected to the first article
inspection in accordance with 4.2.
3.4 Air flow resistance. The air flow resistance of the filter shall not exceed 4.5 inches (114.3
mm) of water gage (iwg) at a 150 standard cubic feet per minute (scfm) air flow rate with an air
stream temperature of 70_F (21_C) and a barometric pressure of one atmosphere (760 mm Hg)
when tested as specified in 4.4.1.
3.5 Filter Leakage. The filter shall not leak when a concentration of 1000 parts per million
(ppm) of R --- 134a (1,1,1,2 Tetrafluoroethane) refrigerant is introduced at the inlet of the filter
at a flow rate of 30 scfm when tested in accordance with 4.4.2. The refrigerant (R --- 134a) shall
conform to the characteristics of ARI STANDARD 700. A filter leak shall be defined as the
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