WET OR DRY AIR CLEANERS?

In a paper presented to the Society of Automobile Engineers at Seattle in August, H. M. Turner, of the Donaldson Company, Inc. gave a paper on air cleaners, and discussed the choice of wet or dry cleaners, and put the case for a composite type of dry air cleaner. Fig. 1 shows the importance of air filters in the case of rock crushers and earth moving equipment of all types. The rock crusher air cleaner has to handle 1,300 times the dust that the automobile air cleaner does, more than 100 times that of the farm tractor and about 6 times that of the crawler tractor.