20-0535 DSV, 12AN ORB TO 12AN MALE, LOW FILL This long quick fill dynamic safety vent valve shuts off the refueling process early. After the DSV float valve shuts off the vent, pressure will begin to build in the fuel cell. Once the dry break is released, air pressure will bleed out of the fill vent and fuel will quickly fill the empty void in the fuel cell.  This DSV is ideal for smaller fuel cells and/or shorter fill necks.