MIL-PRF-52308J
the fuel inlet coupling to the fuel outlet coupling (excluding accessory valves), less the pressure
drop across the filter/separator without the element installed.
6.4.3 Clean, dry fuel. As defined by API 1581, Table 1; also as fuel containing not more than
0.26 mg per liter of solid contamination and no free water, or an irreducible minimum amount of
free water, as indicated by the test system fuel quality monitors or devices specified herein.
6.4.4 GPM. Gallons per minute, also gal/min; inch-pound flow rate.
6.4.5 L/min. Liters per minute; metric flow rate.
6.4.6 ppmv. Parts per million by volume; dimensionless, volumetric concentration.
6.4.7 mg/L. Milligrams per liter; metric concentration.
6.4.8 psi. Pounds per square inch; inch-pound pressure.
6.4.9 kPa. Kilopascals; metric pressure.
6.5 Separator stages. Satisfactory performance of filter/separators utilizing the elements cited
in 3.4.1, has been based on the use of water-removing separators that physically strip the
coalesced water droplets from the flowing fuel stream. The vertical filter/separators used by the
military utilize a cylindrical canister (separator) that surrounds each element and contains a 100-
mesh monel (or stainless steel) screen coated with polytetrafluoroethylene, a hydrophobic
material. Drawings 13216E2773 and 13217E6316 are provided for guidance only.
6.6 Subject term (key word) listing.
Contamination
Filtration
Separator
Fuel
6.7 Recovered materials. For the purpose of this requirement, recovered materials are those
materials which have been collected from solid waste and reprocessed to become a source of raw
materials, as distinguished from virgin raw materials. The components, pieces and parts
incorporated in the element may be newly fabricated from recovered materials to the maximum
extent practicable, provided the element produced meets all other requirements of this
specification.
6.8 Solid contaminants The solid contaminants can be obtained from the following suppliers.
a.
Red iron oxide, obtainable from Harcros Pigments Inc., 2001 Lynch Avenue, East St.
Louis, IL 62205, identified as Copperas Red Iron Oxide no. R9998.
b.
A1 Ultrafine Test Dust ISO 12103-1, obtainable from Powder Technology Inc., P.O. Box
1464, Burnsville, MN 55337.
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