Karrasik says that you have to keep the air to about 1% volume percent, that it is very difficult to keep it to 1%, anymore and you'll start having trouble. Have you not found this to be so? Karrasik says that any more and it starts hurting the pump's hydraulic performance.
Where could I find literature on airbinding (vapor lock is the same thing, right?) of centrifugal pumps? With examples showing piping and pump configurations where it has actually occurred from air (or gas) entrainment or sudden influxes of gas. Also literature with examples of how much air or...
