I'm wondering how the solenoids are supposed to be programmed. For the double solenoid, when you pulse one side, do you keep the solenoid under constant current in order to keep that side of the valve open, or do you only have to momentarily pulse it? And for the single solenoid, does it work like the double solenoid where you simply reverse polarity? And does the current have to be constant and not just a momentary thing to keep the valve open? Any help would be much appreciated.
