Engine feed shutoff valves are ball valves that are comprised of an aluminum alloy body assembly and ball, PTFE-based ball seats, and a stainless steel drive shaft.  Each are installed with, and are operated by motor actuators that are powered at a nominal 28 VDC. Together, the engine feed shutoff valves and associated motor actuators provide a reliable, commanded capability to cut-off fuel flow to the engines within a few seconds.

Each engine feed shutoff valve is installed in an engine feed fuel line to prevent hazardous quantities of fuel from flowing into designated fire zones in the vacells. A thermal relief valve is incorporated in the design that bridges between the outlet and inlet sides of the ball to prevent excessive pressure build-up due to thermal expansion of the fuel in the fuel lines following an engine shutdown.

APPLICATIONS: Commercial

FEATURES AND ATTRIBUTES:
Parker Aerospace’s engine feed shutoff valve has a corrosion resistant, lightweight construction that weighs only 2.6 lb. The valve shares a design and fielded-service legacy of similar, reliable Parker fuel ball valves that goes back decades, with a guaranteed mean time between failure (MTBF) of 132,900 flight hours minimum.  The Engine Feed Shutoff Valve is certified for conducted current lightning strikes, and use with all standard, available aviation fuels including Jet A, Jet A-1, JP-5, JP-8, and TS-1.  

It can operate between 0 and 60 psig of fuel pressure in the fuel line, at fuel temperatures between -58 degrees F and +160 degrees F, and ambient operating temperatures between -67 degrees F and +185 degrees F.  Its operating time to open or close, when commanded, is between 2.5 and 8.5 seconds, depending on the actuator’s speed.