@Un4gvn,
That's all well and good but I think a ball valve is driven with a solenoid not a motor or the OP would probably have mentioned that, althought we can't take anything for granted here on the forum. I think it's too early to bring up H-bridges because the OP has not given us any electrical parameters for the device he is driving (I guess that's "Need-to-Know", and we don't).
Let's try not to complicated this any more than necessary.