MOTOR-OPERATED FUEL SHUTOFF VALVE

This type of motor-operated fuel shutoff valve is either a ball-valve style or barrel type and is designed with one or more of the following functions: (1) to cut-off fuel flow into the engine in the event of a fire, (2) to allow fuel cross transfer between left and right wing tanks for in-flight CG control, and (3), and to provide APU isolation. The material and finishes used in the construction of the valve and those of similar, previously qualified, valves are unaffected by several environmental conditions listed in RTCA DO-160 and MIL-STD-810. This elegantly simple design is extremely reliable and several variations of this valve have been produced by Parker for over 30 years.