Nozzles

Cla-Val refueling nozzles and accessories are used in aircraft pressure-fueling systems, pantograph assemblies, refueling vehicles, and bottom-loading installations where controlled engagement with an MS24484 single-point adapter is required, together with limitation of uncontrolled fuel release during connection or disconnection. Selection is based on nozzle type, hose-end configuration, pressure-control requirement, strainer access, dry-break isolation, and defueling capability.

The 341GF/342GF and 347GF are underwing refueling nozzles designed in accordance with SAE AS5877 for connection to MS24484 single-point adapters. Construction is based on aluminum and stainless steel for aviation fuel service. The nozzle interlock prevents opening unless the unit is positively engaged to the adapter and prevents removal until the operating handle has returned to the fully closed position. The 347GF incorporates a six-slot connection head, an integrated swivel joint, and an internal interlock arrangement within the nozzle body.

For aircraft protection against overpressure and surge pressure, the 343GF/348GF are direct-acting hose-end pressure control valves installed between the delivery hose or pantograph and the 341GF or 347GF nozzle. Standard set pressures are 35, 45, 50, and 55 psig. Construction includes an anodized aluminum body and stainless steel piston. A lockout device can be fitted where defueling operation is required.

The 344GF is a dry-break quick disconnect used to separate the nozzle or strainer from the hose or pantograph, with automatic shutoff on disconnection and automatic reopening on reconnection. The 349GF is a quarter-turn full-port strainer ball valve with 40, 60, or 100 mesh strainer options, a side inspection port, and NPT or BSPP end connections in 2 in., 2.5 in., or 3 in. sizes. The ball and strainer arrangement can be reversed for defueling service. Maintenance focus areas include strainer cleanliness, seal and interlock condition, safety-lock function, and leak testing after reassembly.