I have been out of the vibration analysis business for a little over three years now so I am working with a fading memory here. A simple test to eliminate electrical induced vibration problems is to watch the spectrum during a coast down (if operations will allow a momentary shutdown). An...
I know very little about valve material sellection, but I have years of experience working on salt water disposal pumps (positive displacement plunger pumps). Almost all of them had cast aluminum bronze fluid ends. I never saw a corrosion related failure on any of these pumps.
