the Fluid Sealing Association (fsa.org i think) is excellent. also check out mcnallyinstitute.com . try to stay away from indivual manufacturers due to their bias.
for a barrier fluid check out royal purple barrier fluid. reccommend keeping clear of gas seals unless it is last option. check out circo-flex, manufactured in georgia i believe.
CD4MCU is the superior material. the solution is to eliminate the cavitation! there are basically 4 types (or sources) of cavitation. a cooling tower could have any or all of them. 1)classic cavitation npsha lower than npshr 2) discharge recirculation - the pump is being operated far to the left...
