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TM 10-4930-247-13&P
1-12. SYSTEM TECHNICAL PRINCIPLES OF OPERATION - cont.
e.
Open Port Nozzle. The open port nozzle is used to refuel aircraft having gravity feed, non-pressurized fuel
systems. The nozzle is inserted into the aircraft fuel tank neck and filled by squeezing the nozzle control lever.
The open port nozzle must be connected to the CCR nozzle for operation. The pressure regulating feature of the
CCR nozzle limits fuel pressure through the open port nozzle to 15 psi.
f.
(Model HTARS100) Single Point Refueling Nozzle (D1). The D1 nozzle is used to refuel pressurized aircraft fuel
systems. Fuel pressure through the D1 nozzle is regulated by the HEMTT tanker. The D1 nozzle is connected to
the aircraft by mating the nozzle adapter against the aircraft adapter and rotating the nozzle handles until the
connection is firmly locked. Setting the control lever to the OPEN position unseats an internal poppet and allows
fuel flow through the nozzle. Mechanical locks prevent the nozzle from being disconnected while the control lever
is set to OPEN. When the nozzle is disconnected, mechanical locks retain the control lever in the CLOSE
position to prevent accidental fuel spills.
g.
(Model HTARS101) Single Point Refueling Nozzle (D1). The D1 nozzle is used to refuel pressurized aircraft fuel
systems. Fuel pressure through the D1 nozzle is controlled by the built-in pressure regulator not to exceed 45 psi
The D1 nozzle is connected to the aircraft by mating the nozzle adapter against the aircraft adapter and rotating
the nozzle handles until the connection is firmly locked. Setting the control lever to the OPEN position unseats an
internal poppet and allows fuel flow through the nozzle. Mechanical locks prevent the nozzle from being
disconnected while the control lever is set to OPEN. When the nozzle is disconnected, mechanical locks retain
the control lever in the CLOSE position to prevent accidental fuel spills. Clamp and pin type connectors are
attached to the nozzle bonding cable.
h.
Recirculation Nozzle. The recirculation nozzle is used to circulate fuel from the system fuel hoses back to the
HEMTT tanker. The nozzle must be connected to the CCR nozzle to operate. Fuel pressure through the
recirculation nozzle is regulated by the CCR nozzle to 15 psi. The recirculation nozzle is connected to the tanker
by mating the nozzle adapter against the tanker adapter and rotating the nozzle handles until the connection is
firmly locked. Setting the control lever to the OPEN position unseats an internal poppet and allows fuel flow
through the nozzle. Mechanical locks prevent the nozzle from being disconnected while the control lever is set to
OPEN. When the nozzle is disconnected, mechanical locks retain the control lever in the CLOSE position to
prevent accidental fuel spills. A ball valve and tube are installed on the nozzle body to allow sampling of the
recirculating fuel.
Change 4 1-9
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