The G457 Automatic Helicopter Refueling Nozzle was originally developed for military applications. This nozzle is designed to ensure that fuel cannot be accidentally delivered into the engine air intake during hot refueling (fueling with rotors turning).

Proximity (dead man) lever which automatically shuts off fuel delivery on withdrawal of the nozzle spout form the filler neck
High level shut-off by fuel sensor in spout, also equipped with anti-froth device
Manual override for tank filling to absolute maximum capacity
Supplied complete with 100-mesh inlet strainer, dust cap, and grounding wire
Black anodized finish for all-weather protection
Tested for temperatures as low as –30°C
Fuel resistant Buna-N splashguard
High level shut-off maintained down to flow rate of 37.8 liters/min (10 US gal/min)
Flow control mechanism is capable of handling pressures up to 110 psi
Swivel integrated into nozzle
NATO specification

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