MIL-DTL-62180F(AT)
3.3.4.2 Filter separator assembly liquid, fuel, 300 gallons per minute (gal/min). The
filter/water separator assembly shall consist of a filter/water separator with fuel monitors, an
automatic water drain valve and a differential pressure gage. The filter/water separator shall
provide fuel with no more than 250 parts per million (ppm) impurity. The filter separator shall
include a feature for monitoring the purity of fuel being dispensed by the filter/water separator.
Fuel monitors shall completely shut off the fuel flow if the fuel is contaminated over the purity
level specified above. Jet fuel (JP-4, JP-5, JP-8) and aviation kerosene shall be filtered at flow
rates up to 300 gal/min. Diesel fuel (No. 1 & 2) flowing through the filter/water separator shall
be limited to a minimum flow rate of 100 gal/min. The filter/water separator shall be ASME
code stamped, certifying that the filter/water separator complies with the requirements of
specified code (see 4.5.5).
3.3.4.3 Recirculation assembly aircraft fuel servicing. Aircraft fuel servicing
semitrailers shall consist of an overwing nozzle adapter converter, with a fuel sampling port and
fuel sampling components. The recirculation assembly shall purge the fuel lines of the complete
tanker overwing dispensing unit of the underwing/overwing dispensing assembly, including
hoses. It shall remove condensation and fuel contamination by circulating fuel through the
complete delivery system, for a maximum of one minute, prior to dispensing fuel to the aircraft.
Purging the underwing delivery system shall require recirculation assembly components. The
fuel sampling capability shall provide for the use of components which are compatible with both
the overwing system fuel sampling port and the underwing system fuel sampling port
(see 4.5.6 and 6.6).
3.3.4.4 Vapor recovery system/kit. Fuel vapor recovery system shall be compatible with
the four inch diameter quick-disconnect field vapor recovery system connections used at a
majority of fuel depots (see 4.5.7).
3.3.4.5 Dispensing assembly: fuel, automotive. The dispensing assembly shall consist of
dual automotive refueling systems which are pressurized, to deliver fuel, by a diesel engine and
centrifugal pump combination. Each refueling system shall be composed of a meter, electric
rewind hose reel, 50 feet (ft) of dispensing hose and a dispensing nozzle conforming to
Drawing 12275441. The dispensing assembly shall provide delivery of fuel for vehicles or
containers at flow rates as shown in table II. Dead man and overflow prevention features shall
be provided as part of the dispensing assembly (see 4.5.8).
3.3.4.6 Dispensing assembly fuel, underwing/overwing, aircraft. The dispensing
assembly shall consist of two separate refueling systems; one for overwing and one for
underwing servicing. The underwing system shall consist of a centrifugal pump, diesel engine, a
meter, a 50 ft length of 2-1/2 in. hose, electric rewind hose reel, deadman control, static
grounding reel and a closed-circuit underwing dispensing nozzle. The overwing system shall
consist of a 50-ft length of 1-1/2 in. hose, an overwing dispensing nozzle, and an electric rewind
hose reel. This system shall utilize the same engine, pump, filter/water separator and static
grounding reel as the underwing servicing system. A small, closed-circuit dispensing nozzle
(interchangeable with the overwing nozzle) shall be provided for underwing refueling. The
underwing system of the dispensing assembly shall provide for metered delivery of fuel for
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