Thats the exact valve we use. Good find.
We use our rig for transfering fully carbonated beer. That is the reason we have to have 4 valves. One would take a beer bath early and often if not.
Temp will not matter since you are only transfering flat beer. It only comes into play when carbonated. Although cold is always better. One last thing make sure the destination kegs are fully purged with CO2...Good luck.
CBO "Chief Brewing Officer" / Zymurgist
Bluegrass Brewing Co
636 East Main St