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3.7. Line Strainers. Line strainers are installed to prevent entry of foreign matter. Strainer location
and size are detailed in MIL-HDBK-1022A. FMF personnel will clean strainers in accordance with
T.O. 37-1-1, Section IV, paragraphs 4-11.o, 4-12.c and 4-13.a. LFM is responsible for providing
gaskets as required.
3.8. Automatic Air Eliminators. The automatic air eliminator has a chamber with a float-operated
valve in the top. Air is continuously discharged through the vent to the atmosphere until the air
eliminator tank is filled with liquid, then the vent valve closes. Air eliminators are piped to a recovery
tank or are within a curbed area to prevent accidental release of fuel.
3.9. Truck and Tank Car Offloading. Facilities for receiving fuel are typically near the installation
fuel storage area.
3.9.1. Major components of offloading facilities include underground, low-profile, or aboveground
tanks, grounding systems, suction hoses, piping, pumps, air-elimination equipment, and electrical
control equipment. For offloading problems, consult the MAJCOM fuels engineer. For required
maintenance frequencies see Chapter 10. For troubleshooting equipment, refer to the manufacturer's
3.9.2. Pumps will be self-priming centrifugal type configured to provide automatic air elimination
for offloading into aboveground storage tanks. Contact your MAJCOM fuels engineer for additional
information since there are many types and configurations of pumps. Underground or low-profile
tanks typically receive fuel by gravity offload.
3.9.3. Offloading hoses should be 101-millimeter, lightweight, reinforced, vacuum-rated hoses. See
MIL-HDBK-1022A for details. Store the hoses away from direct sunlight in a hinged enclosure or
purchase ultraviolet (UV) light-resistant hose.
3.9.4. Design of offloading facilities requires unique knowledge and must be done by engineers that
specialize in aircraft fueling systems.
3.10. Tanker or Barge Offloading. Fuel piers and wharves are used to receive fuel from marine
vessels at air bases and tank farms near navigable waters. The pier or wharf has mooring facilities, hose
connections, derricks or unloading arms, attaching hose, hose storage racks, pipelines, and fire-
protection equipment. A separate pipeline is usually provided for each product. Tankers and barges
have pumps to discharge cargo, and usually offloading hoses as well. When necessary, booster or
transfer pumps are installed in the pipelines on shore to transfer fuel from the tanker to the tank farm.
Pipelines must be protected from corrosion with an emphasis on cathodic protection. . Some locations
will have mono-buoys with either underwater pipelines or retractable floating hoses for offloading
3.11. Fill Stands.
3.11.1. General. Fill stands are used to issue fuel to refueler trucks, tank trucks, or rail tank cars.
220.127.116.11. Provide separate facilities for each type fuel. Couplers must not be interchangeable.