TWO-STAGE FUEL TANK ISOLATION VALVE WITH INTEGRATED PRESSURE RELIEF

A fuel tank isolation valve is provided. The valve includes a valve member disposed within a valve chamber defined by a housing. The valve member is mounted on an alignment pin of a moveable plunger of a solenoid assembly. The valve member includes a first stage valve surface and an opposite second stage valve surface. In a closed disposition, the first stage valve surface is seated on a surface of the moveable plunger, and the second stage valve surface is seated on an inner surface of the housing. In a first stage open disposition, the first stage valve surface of the valve member is unseated from the moveable plunger while the second stage valve surface remains seated. In a second stage open disposition, the second stage valve surface is unseated from the inner surface while the first stage valve surface becomes seated on the surface of the moveable plunger.