... ROMECD -V3 Direct-Acting Valve Types A direct-acting SPV is used to achieve high levels of response and spill performance.ROM33Solenoid Spill Valve (SPV)Solenoid Spill ValvePlungerPressureChamberCoilto ... direct-acting solenoid valve type. Thedirect-acting solenoid valve type is widely used today. The pumps are classified into the ECD -V3 , ECD -V3 (ROM), and ECD -V3 direct-acting valve types, depending ... solenoid spill valve is no longer energized, the spill valve opens. Then, the high-pressure fuel in thepressure chamber spills into the pump chamber, thus reducing its pressure and ending the injection...