Yeah, if it gets to 100 BAR, then it's not a problem in terms of the pump not generating enough pressure vs a bottle.. you have a seperate issue.

If it's start dumping at around 100 BAR, I'm thinking an o-ring or other seal is failing at this pressure. It's less likely to be the valuve, itself, as valve leaks tend to ne relatively small/slow (well, unless they have physically broken)..