This is a 2001 model, retrofitted with the bellows seal kit after 2 seasons, now dripping too much again. VFD drive, 123. No excess purge at all. Very tight, hardly ever lets a fart. Runs like a top other than the seal drip. I just set the cavity pressure barely positive at 60 Hz.
The machine spends most of the time around 45Hz, so the question is, should I set the cavity pressure at that speed or wound up?
Any other ideas about the bellows seal would be appreciated.
Thanks to all...