BREAKAWAY VALVE

Proven lifesavers, Stratoflex breakaway valves separate under high loads on fluid lines exceeding a predetermined value. Upon separation, the valves automatically seal the fluids in the lines to effectively prevent spills. Breakaway valves are typically used on fuel lines, main fuel tanks, extended range aircraft auxiliary fuel tanks, air-to-air refueling systems, and fall-away external tanks. Tank vent lines often use the single valve versions.
The basic design incorporates a butterfly valve mounted to a cam shaft loaded by a coil spring. This design allows for a small envelope, lightweight, and minimum pressure drop across the coupling. The mechanism consists of two valve plates andor a single plate and detent post. These are held against each other by spring action until the fuse section separates to allow valve closure.
An internal sealing sleeve is installed in between the interface joint of the two valve bodies and seals the fluid leakage from internal to external before valve bodies are totally separated. This construction permits a clean valve passage, minimizing ice formation and contamination. No parts are released to interfere with the valve operation during closure.