MIL-PRF-83861D
3.4.2 Aging. If filter materials having age limitations are used, an expiration date shall
be added to the marking requirement of 3.8.
3.4.3 Hazardous materials. The use of toxic chemicals, hazardous substances or
ozone depleting chemicals shall be avoided, whenever feasible.
3.5 Interface.
3.5.1 Dimensions. The filter element shall conform to the dimensions for the appropriate
part number (PN) as designated by figures 1, 2, or 3 (see 6.2).
3.5.2 Type. The filter element shall be of the full-flow type. The flow through the filter
element shall be from the outside of the filter to the inside.
3.6 Performance.
3.6.1 Endurance. The filter element shall be capable of withstanding 2,000 hours of
operation in ambient temperature with a 275°F test fluid.
3.6.2 General. Filter element performance requirements are specified in table I.
3.6.3 Filter media. Filter media shall withstand thermal and pressure-flow cycling. In
addition, there shall be no filter media migration during operation.
3.6.4 Bubble point. The initial bubble point of the filter element shall occur at a minimum
of 3 inches of water.
3.6.5 Fluid contamination. Filter material shall not contaminate hydraulic fluid.
3.6.6 Cold start. The filter element shall withstand the differential pressure specified in
table 1 for 10 flow cycles at -65° ± 5°F.
3.7 Interchangeability. All parts having the same manufacturer's part number shall be
functionally and dimensionally interchangeable.
3.8 Item identification. The filter shall be permanently and legibly marked with the
following information:
a.
Manufacturer's name
b.
Manufacturer's CAGE code
c.
Manufacturer's PN
d.
Manufacturer's lot number
e.
M83861/X-XX
f.
Expiration date of life-limited material if required by 3.4.2
The markings shall not affect the sealing or performance of the filter element.
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