Can't find circuit example for a solenoid valve 2W025-08
It's hard to find reliable information on this valve but it seems the power of this one is 8VA, which means less than 1A DC. Take it with a huge grain of salt however. A measurement is way better than any wild guess though. If the valve current is confirmed, the TIP120 (datasheet [EN]) is quite fit for the job. The freewheel diode should fit, too.