The Boeing Company
JET PUMP SPOOL VALVE

Abstract:

A jet valve to control flow of a fluid therethrough is disclosed. The jet valve includes a valve body, a juncture operatively coupled to the valve body, the juncture having a first fluid connection fluidly coupled to a header tank and a second connection fluidly coupled to a storage tank, a spool movably disposed within the valve body, the spool having an aperture extending longitudinally therethrough, a spring operatively coupled between the spool and the valve body, and a jet pump fluidly coupled to a fuel pump of the header tank via a bleed line, the jet pump disposed within the aperture, wherein operation of the fuel pump pressurizes the bleed line and moves the spool to a first position to (i) close a first fluid path between the header tank and the storage tank and (ii) provide a second fluid path between the header tank and the storage tank, the second fluid path through the aperture, and depressurization of the bleed line enables the spring to move the spool to a second position to close the second fluid path and open the first fluid path.