Check this out. Got one today and it is beyond a doubt the best nozzle I have ever owned. Spoke with the owner and his warranty will include SH usuage. He is ordering special SH resistant O rings and seals just for our use. Half a turn goes from off to full stream, with different patterns in between. He puts the name of your company on them also. They are somewhat pricy, but you will never need a new one. If you buy one, mention Gary from RCIA to ensure you get the warranty and extra O-rings for SH. No more ball valves or spray tips.
http://masterindustriesllc.com/index.html
http://masterindustriesllc.com/index.html