Yes, as long as the dive tank has a din valve, and not "A" clamp.
The 300 bar din fill rig will work in both a 300 bar and a 232 bar dive tank. The difference between the two tanks is the length of thread in the valve, with the 300 having the longer thread.
If you get a 232 bar fill rig, it will not be long enough to fit the 300 bar bottle.