trapped downstream fuel. The system shall also
include approved pantograph swivels, emergency dry
breakaway coupling, hose, dry break coupling with 60
mesh screen, hose end pressure limiter, and single
point fueling nozzle with Gammon QD sample
connection.
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Provide valves, meters, piping, discharge manifolds, pantograph, and hose.
Metal in contact with the fuel shall be stainless steel or aluminum alloys
as specified herein. Provide pushbutton station with on-off (green/red)
indicating lights for pump control and hand held deadman for on/off flow
control of fueling control valve. Station shall include but not be limited
to the following components:
2.15.5.1
Fusible Link Shutoff Valves
Fusible link wafer trunnion 150 mm 6 inch valve, with 74 degree C 165
degree F fusible link and a completely enclosed spring operator.
2.15.5.2
Meter
Provide 38 liters per second 600 gpm meter as specified herein.
2.15.5.3
Refueling Valve
Provide as specified herein.
2.15.5.4
Provide as specified herein.
2.15.5.5
Venturi
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NOTE: Venturi is required in aircraft fueling
stations.
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Provide for compensated pressure regulation of each refueling valve. The
venturi shall be sized to compensate for pressure drop of entire pantograph
assembly at minimum design flow rate. The amount of recovery shall be
adjustable and the maximum unrecoverable pressure drop at 38 liters per
second 600 gpm shall be less than 69 kPa 10 psi.
2.15.5.6
Pantograph Assemblies
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NOTE: For fixed wing aircraft direct fueling
station, use 80 mm 3 inch diameter hose and 80 mm 3
inch diameter emergency breakaway coupling.
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NOTE: For helicopter direct fueling station, use 50
mm 2 inch diameter hose and 50 mm 2 inch diameter
emergency breakaway coupling.
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SECTION 15194N
Page 26
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