The output type doesn't matter if is a digital output. If you use proportional valve you'll certainly have a better response and less error, but for your task on/off valve should do fine.
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Hi Joman, you'll need to implement a pid of some kind, and of course tune the loop for your application.
Have a look here engineering.stackexchange.com/q/23651
The output type doesn't matter if is a digital output. If you use proportional valve you'll certainly have a better response and less error, but for your task on/off valve should do fine.