Ted,

Good points on $$ for splitting NH3 bars. Another deterrent in the past is the chance that one could forget to ENable that valve you just shut off & you might continue for some time only feeding 1/2 (or whatever) the bar.

BUT-would the Insight activate both the valves again after you lift for a turn? Or-would it just keep applying with a reduced portion of the bar until the operator inputted differently?

Also-for the original question. I assume you know that all ball valves are NOT NH3 approved? I don't mean to question what you may know-just hoping that everyone knows.