MIL-PRF-15618H (SH)
4.2 Inspections and tests.
4.2.1 Inspections. The filter-separator assembly, containing elements qualified to MIL-PRF-32148 shall be
examined visually and checked dimensionally for conformance to drawings and the applicable requirements of
Section 3 of this specification.
4.2.2 Tests. The filter-separator assembly, containing elements qualified to MIL-PRF-32148, shall be
subjected to the full-scale test method in accordance with API/IP 1581. The test facility shall be in accordance with
API/IP 1581. The test fluid shall be in accordance with API/IP 1581, Category M fuel.
4.2.2.1 Hydrostatic. The filter-separator assembly shall be hydrostatically tested in accordance with API/IP
1581.
4.2.2.2 Full-scale test series. The full-scale test series consists of a media migration test, a 0.01 percent water
coalescence test, a solids addition test, and a water addition-solids contaminated system test. The filter-separator
assembly shall be tested in accordance with the procedures specified in API/IP 1581. The filter-separator shall meet
the requirements for API/IP 1581 Category M, Type S, two stage units except that undissolved water in the effluent
fuel shall meet the effluent fuel requirements specified in MIL-PRF-32148.
4.2.2.3 Water defense system test. Proper operation of the water defense system, consisting of the water-slug
shutoff device and automatic sump drain (when equipped), shall be verified. Test shall be conducted by injecting
water into the test fluid until the water-slug shutoff device and automatic sump drain (when equipped) demonstrate
proper actuation. Testing shall not require removal or disassembly of any pressure boundary components. At the
conclusion of the Water Defense System Test, residual water shall be drained from the unit and the water-slug
shutoff test mechanism equipped on the filter-separator (see 3.5.3) shall be tested for operability.
4.2.2.4 Shock. The filter-separator assembly shall be shock tested while filled with fresh water or test fluid and
with all elements and appurtenances installed. Where the filter-separator unit weight exceeds the capacity of the
medium weight shock machine, critical components (such as elements and mounts) shall be tested utilizing the light
weight shock machine. A cluster of at least four elements and mounts, and a typical section of a mounting plate
shall be used. Test of the filter shall be Shock Grade A, Equipment Class I, Shock Test Type A, Hull Mounting
Location, Base Mounting Plane, and Unrestricted Mounting Orientation. Test of the element and mount cluster shall
be Type B in accordance with MIL-S-901. After shock testing, filter-separator shall be inspected for damage and
then hydrostatically tested in accordance with 4.2.2.1.
4.2.2.5 Vibration. The filter-separator assembly shall be vibration tested in accordance with MIL-STD-167-1,
Type I Environmentally Excited while filled with fresh water or test fluid and with all elements and appurtenances
installed. After vibration testing, filter-separator shall be inspected for damage and then hydrostatically tested in
accordance with 4.2.2.1.
4.2.2.6 Temperature variation. The filter-separator shall be certified to meet the requirements of 3.8.3 as
specified (see 6.2).
4.2.2.7 Materials. The filter-separator shall be certified to meet the requirements of 3.8.4 as specified (see 6.2).
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these
personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging
requirements are maintained by the Inventory Control Point's packaging activities within the Military Service or
Defense Agency, or within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
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