Of course buy a new one at a DeLonghi supplier. The old one normally has a metal body, the new one plastic. That provokes some problems. You also need raccords for directions in- and out. The outgoing one is double, but there may be differences. In the photo they are already assembled.
Attention! The valve has a direction. The sense of the flew is towards the black point. The double raccord must be there!
This guide helped me tremendously with the repair of my Delonghi Magnifica which is very similar. In particular, the explanation of the difference between the old and new solenoids, and the need for new raccords (a new word to me!) was helpful, although I’ve yet to figure out where to get the raccords from.
I fitted a new pump, flow meter, and will be fitting a new solenoid when I get the relevant parts.