MULTIPLE FILTER APPARATUS

摘要

A multiple filter apparatus interposed in a compressed air system for removing moisture from compressed air supplied by a compressor to a storage reservoir, said apparatus having at least two filter units and control means for effecting periods of alternate purging of moisture from each of said filter units and alternate filtering operation of each of the filter units, such that one filter unit is being purged while the other is filtering, and vice versa, at all times, said control means including timing means for determining a preselected duration of said periods independently of the compressor operating cycles.