On occasions when I am running 8 or 9 gpm and 3500psi with spikes higher than that when the gun is closed. I am having a big problem finding a two way 3/8â€ carbon steel ball valve that can handle that. I have some ALCO PB3NS-LS 6000psi that I like OK but they are $100/ea and I have to buy two at a time. I use Parker valves for my lower pressure apps with good success. However, their valve with these specs is no good. Do anybody know of anyone else who makes a good 5000-6000psi valve?