Quote Originally Posted by emin-j View Post
Sounds to me like the valve is sticking and suddenly ' letting go ' when the valve is unscrewed to a high flow rate level, I have the mde valve on my bottle and don't consider it a quality item, I open the valve slowly then there is a point where the air will barely start to flow then without unscrewing anymore the airflow will suddenly increase to the point the valve in the gun will 'click', at that point I have to turn the air pressure valve down to restrict the airflow I can then adjust the gauge to give a slow fill.
It reads worse than it actually is, I've got used to the method now.
Have you ever tried to use the bleed screw as a form of safety to help alleviate the problem. I remember reading this fairly recently (post 35 HERE). Might get a bit confusing operating a valve and a bleed at the same time, but maybe something to consider for your scenario? Not appropriate for the OP who appears to have a more problematic valve.