Reddit reviews Johnson Controls VA-4233-GGC-2 VA-4233 Series Electric Valve Actuator, Automatic Spring Return, Proportional Control, Two Auxiliary Switches
We found 1 Reddit comments about Johnson Controls VA-4233-GGC-2 VA-4233 Series Electric Valve Actuator, Automatic Spring Return, Proportional Control, Two Auxiliary Switches. Here are the top ones, ranked by their Reddit score.
Designed for use in hot water, chilled water, and steam applications, allowing for universal applicationAutomatic spring return returns the valve to the full stem-up position, in the event of a power failureSimple no-linkage mounting with AUTO stroke calibration at installation (VA-4233-GGx models only) reduces installation time and costReversible stroke direction (VA-4233-GGx models only) expands usability by allowing switch-selectable direct or reverse actionOptional auxiliary switches provide adjustable switch points with line voltage capability
It's not really worth trying to add any kind of motor onto a small valve, since you can buy 12v water solenoid valves for ~$10 everywhere in the world. Every clothes washing and dish washing machine uses them. Many countries use water pressure that is ~25PSI so they will usually withstand at least that much pressure.
Most cheaper water solenoid valves are really only made to function as on-off valves. You can apply PWM to them to open them partly--but the way that the valve is made, the flow does not increase in a linear fashion from zero to 100% across the whole movement. It is much cheaper and simpler to just use a cheap water solenoid valve, measure its flow rate when open, and then operate it on-off-on-off to achieve the overall flow rate that you want.
Why do you need a ball valve specifically? If you want a valve with proportional flow control, be aware that electronically-activated valves that can do that are rather expensive. A couple other people posted links to electric ball valves, but it you notice, neither of those examples is made for fully-proportional control. Usually those are wired so that they will automatically run to either end of the range (that is, they only turn totally-on or totally-off).
Here is one that can do proportional control, and it costs $487 .... https://www.amazon.com/Johnson-Controls-VA-4233-GGC-2-Automatic-Proportional/dp/B00EKIWR2W/ref=sr_1_2 ...This may be a gate valve, not a ball valve. It has a manual override, and it has auto-shutoff if it fails electrically. There is cheaper ones that that, but from what I have seen in the past you would be lucky to find any priced less than $300.