MIL-PRF-52308J
3.4.3 Contaminant removal. The element in combination with a separator stage (see 6.5)
shall remove solids and up to 3 % water by volume at fuel flow rates up to 100 % of rated flow.
The effluent fuel samples shall contain not more than 15 parts per million by volume (ppmv) of
undissolved water when measured in accordance with ASTM D 3240. The average weight of
solids in the effluent fuel samples shall not exceed 0.26 milligrams per liter (mg/L), and the
weight of solids in any single sample shall not exceed 0.5 mg/L.
3.4.3.1 Solids removal capacity. The element shall remove and retain a quantity of solids at
least equal to 5.4 grams per gal/min of its rated flow capacity. The pressure differential across
the element at rated flow shall not exceed 15 psi (105 kPa) before 50 minutes, nor 45 psi (315
kPa) before 75 minutes at a solids concentration in the influent test fuel of 72 mg/gal (19 mg/l).
3.5 Environmental requirements.
3.5.1 Transit drop. Each packaged element (see 5.1) shall withstand the shock of being
dropped on a flat surface of solid concrete, from a height of 48 inches, by showing no evidence
of cracks or deformation of the end caps or damage to element media.
3.5.2 Temperature resistance. The element shall withstand storage in fuel in temperatures
ranging from -50 degrees Fahrenheit (°F) to +160 °F (-46 degrees Celsius (°C) to + 71 °C) after
which it shall operate as specified.
3.5.3 Fuel and salt water immersion. The element, after being immersed in test fuel for 100
hours near both the high and low operating temperature limits in 3.5.2, and after immersion in
salty water for 72 hours, shall show no evidence of swelling, corrosion, separation of
components, dissolving of adhesives, or deformation which could cause failure during operation.
3.5.4 Post-environmental testing. The element having completed 3.5.3 shall operate as
specified.
3.6 Support and ownership requirements.
3.6.1 Identification marking. Element marking shall include, as a minimum, the following
information permanently marked or stamped on the element (see 6.2):
a.
NSN: (Specify)
b.
Contract or Order No.: (Specify)
c.
Lot: (Specify) (see 6.2e and 6.2f)
d.
Manufacturer's Identification: (Specify)
e.
Date of Manufacture: (Specify)
f.
Class of element: (Specify) (see 6.2b)
3.6.2 Workmanship. The element shall be free from burrs, tears, smudges, or any other
defect that will impair serviceability.
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