I just puchased a system from HB. I need a 1/2 high flow regulator my pressure switch is 200psi and everyone says not to blow k3’s continuously @ 200psi. I cant find a regulator cheaper than 200 bucks that can handle 200psi. Its hard to find a 250psi gauge… Any ideas?
Have you tried Grainger or McMaster-Carr?
ours is 3/8" NPT, max 150 PSI, at 45 CFM for $80
McMaster Carr
those are 145psi max… Im sure they have a safety factor but still… I have spent alot of coin on all this sh… Im not gonna cut short now.
4959K303
10-250psi regulating range
300psi max
$59
You must have this ready to copy/paste by now? Ha I wouldn’t blame you! 
Yeah, it’s about once a week LOL.
I don’t mind though.
It is the cheapest / highest flow regulator that I found.