Aircraft Underwing Refueling Valve type 347GF | Cla-Val | Philippopoulos s.a.
Aircraft Underwing Refueling Valve type 347GF | Cla-Val | Philippopoulos s.a.

Aircraft Underwing Refueling Valve type 347GF | Cla-Val

Cla-Val 347GF Aircraft Underwing Refueling Nozzle

The Cla-Val 347GF is an underwing refueling nozzle/valve for single-point pressure refueling of aircraft. It interfaces with aircraft adapters per MS24484 and is designed in accordance with SAE AS5877. The connection head uses a six-slot geometry to mate with three-lug aircraft adapters.

Construction and Materials

Primary construction utilizes aluminum and stainless steel, with seals made from fuel-resistant Nitrile, Acetal, and Polyurethane. Aluminum surfaces are anodized or coated for corrosion mitigation. Copper, zinc, and their alloys are excluded from the wetted parts to prevent galvanic corrosion and fuel contamination.

Safety Interlock Function

The internal interlock prevents nozzle actuation prior to positive engagement with the aircraft single-point adapter. Once connected, the 347GF cannot be rotated or removed until the operating lever is fully closed. The safety lock mechanism reduces risk of incomplete or unsafe engagement with the adapter.

Configuration Options

Component selection is based on refueling vehicle architecture, hose-end pressure control requirements, and disconnection philosophy.

  • HEPCV: 35, 45, 50, or 55 psig; available with swivel or flanged connection
  • Strainer: 40, 60, or 100 mesh
  • Quick disconnect: standard QD or dry break QDV
  • Inlets: D-1, D-2, D-3 male QD, with swivel or flanged connection
  • Threads: 2”, 2.5”, or 3” NPT/BSPP
  • Handles: standard, long, circular, 7° or 15° bend

Applications

  • Hydrant dispensers and airport refueling vehicles
  • Jet A-1 refueling via underwing single-point adapter
  • Military and civil ground fueling operations
  • Installations requiring dry break disconnection or hose-end pressure control

FAQ

When is HEPCV specified?
When local hose-end pressure limitation is required, independent of upstream pressure fluctuations.

When is QDV dry break specified?
Where disconnection with minimal fuel loss and reduced trapped volume at the connection point is required.

Datasheet and documents

Description

The Cla-Val 347GF Nozzle is designed per SAE AS5877 and is constructed entirely of aluminum and stainless steel, with fuel resistant Nitrile, Acetal and Polyurethane seals. All aluminum surfaces are anodized or coated to prevent corrosion. No copper, zinc, or alloys thereof are used in construction. The 347GF Nozzle connects to an aircraft “single point adapter,” conforming to specification MS24484.

The Cla-Val 347GF Nozzle is designed to maximize safe refueling operations. An internal interlock system, fully contained within the nozzle, prevents it from being opened when not connected to an aircraft adapter. In addition, when connected to an aircraft adapter, the 347GF Nozzle cannot be removed until the operating lever is first rotated to the fully closed position.