Hi

I am getting system overpressure at the end of my run, I am running 1%AcCN/formic acid (0.15) to 100%AcCN over 6 mins. The pressure goes up to 490 psi as the run progresses.

When the run it over, the system when in the purging mode give the "accumulator pressure build up"
I am using an alliance 2795.
Any suggestions please!

thanks