... types "K" impeller: Closed non-clogging impellerFor clear water, sewage, fluids containing solids and sludge which do not liberate gas ... impellerFor clear water, fluids containing slight suspension such as treated sewage, screen water, pulp water, suger juices, etc."O" ... and the canned food industry, particularly applicable to the sewage treatment works; meanwhile, some of the impellers are suitable ...