Reverse flow valve for fuel injectors

A fuel injector comprising:

• an injector body defining a nozzle outlet and including a barrel in contact with a stop component;
• a reverse flow valve member trapped between the barrel and the stop component, and being movable between a first position and a second position;
• a movable plunger at least partially positioned in the barrel;
• a nozzle supply passage, which includes a fuel pressurization chamber, being defined by the injector body, the plunger and the reverse flow valve member;
• the fuel pressurization chamber being fluidly connected to a lower portion of the nozzle supply passage when the reverse flow valve member is in the second position;
• a compressed spring operably positioned in the injector body to bias the reverse flow valve member toward the first position, in which the fuel pressurization chamber is blocked from the lower portion of the nozzle supply passage;
• the barrel includes a valve seat;
• the reverse flow valve member being in contact with the valve seat when in the first position.